DOCSLIB.ORG

New York Academy of Sciences

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
New York Academy of Sciences TRANSACTIONS OF TIIE NEW YORK ACADEMYOF SCIENCES, October 1st. 1894. The meeting was called to order by President Rees, fourteen persons being present. The minutes of the last meeting were read and approved. The Secretary presented the following nominations for resi- dent membership : Mr. John Jacob Astor, Mr. J. C. Pfister, and on motion they were referred to the Council. The Secretary presented the name of Prof. Bohuslav Brauner, Ph. D., of Prague, Bohemia, as a corresponding member, and on motion the nomination was referred to the Council. The following paper, which had been transmitted to the Academy through Dr. H. Carrington Bolton, was then read. ON FLUOPLUMBATES. BY BOHUSLAVRRAUNER, PH. D., PROFESSOROF CHEMISTRY IN THE BOHEMIANUNIVERSITY, PRAGUE. I beg to lay before the Academy a short account of a new series of salts of tetratomic lead, a work which was begun in the Owens College, Manchester, in 1881, and which at intervals has occupied my attention several years. TRANSACTIONSN. Y. ACAD.Scr., Vol. XIV., Sig. 1, Nov. 20,1694. 2 TRANSACTIONS OF THE [OCT. 1, The first member of the series of$uopZunibates, deriratives of fluoplumbic acid, is the potassium salt described below ; it has been obtained by the following methods : I. By treating the freshly precipitated oxide Pb,0,,3€120 which was first described by me in 1885 (Royal Society of Bohemia 295-299),as the intermediate compound between Pb,O, and Pb,O,, with hgdrofluoric acid and potassium hydrogen fluoride. A mixture of lead fluoride and the crystalline fluo- plumbate is obtained, the latter being separated from the former by recrystallization from hydrofluoric acid. 2. By substituting fluorine for oxygen in Fremy’s potassium plumbate, the crude salt containing potassium and lead dioxide in the proportion of 3K,O : PbO, is dissolved in hydrofluoric acid, and from the filtered liquid crystals separate out, which, if necessary, may be purified by recrystallization from hydrofluoric acid. 3. By dissolving lead tetra-acetate Pb(C,H,O,), in hydroflu- oriu acid containing acid potassium fluoride. On spontaneous evaporation of the solution, needle shaped crystals of the fluo- plumbate are obtained. The salt has the composition : 3KF.HF.PbF4, being tripotas- sium-monohydrogen orthofluoplnmbate, as proved by the fol- lowing analytical data. Calculated for 3KF.HF.PbF4. Found. f--- f--- (------ 7 1. 11. 111. IV. V. 3K. .. .111.42 24.60 24-57 - 24.53 - - Pb:. .206.9 43.35 43.41 43.36 43.35 - - 8F. .152*0 31.84 - 31.23 - 31.65 - H. .. 1.0 0.21 - c - - 0.22 ~- 417.32 100.00 The analysis shows that the substance contains no oxygen. The crystallographic examination of the salt was, in so far of theoretical interest, as Marignac has described a perfectly anal- ogous compound of quadrivalent tin, namely 3KF.HF.SnF,, for it shows that both salts are Bomorphous. The cryatals were examined by Prof. Ch. Tirba of our University, but unfortun- ately their faces are uneven and corroded, ao that no absolutely exact crystallographic and optical examination could be made. Assuming the monoclinic symmetry as has been assumed by. Marignac for the fluostannate, the elements are approximately : 1894.1 NEW YORK ACADEMY OF SCIENCES. 3 a : b : c =Z 0.6223 : 1 : 0.4818 and P = 86O 41’. The forms observed are: m (110) 0oP; b (010) mPA; p (111) - P; (11 1) P ; the same forms have been observed by Marignac and in addition to them c (001) OPwas found by him. The angles calculated from the above axial relations for the normals of the planes are given below together with the inclinations observed and Rlarignac’s values of the analogous fluostannate are ap- pended for comparison : Marignac for Calculated. Found. 3 KP. HF. Sn F,. m (110): mr (110) 63” 42/ 63O 39’ 64O Sf b (010) - *58 9 57 54 p (111) - *46 7 - p (111): pf (111) - 40 3‘1 40 49 : b (010) 69 41 69 45 - pi): (111) 42 45 41 15 43 12 : b (010) 68 37 69 31 - The salt is stable in dry air but turns brown in moist air, being decomposed by water in the fo1:owing manner: 3KF. HF. PbF,+nH ,O=PbO.H,O+3KF.HF+HF+(n-3)H,O. The reaction is reversible, for the hydrated dioxide separated first is dissolved by hydrofluoric acid and acid potassium flyor- ide, and consequently complete decomposition takes place only in presence of a large quantity of water. The above reaction was used only for the analysis of the salt. It was also proved that on decomposition with water, 5 mols. HF are set free, for 100 pts. of the salt yielded in this way 20.’iy pts. HF. instead of the calculated quantity of 20.95 pts. HF. The weight of the salt remains absolutely constant even when heated at 100-looo for many hours. At 200° hydrogen fluor- ide begins to escape, the loss amounting to 1.72 p. c. At 850° the loss was 5.43 p. c., showing that 1.24 p. c. of the total of 7.96 p. c. of the available quantity of “active” fluoride has been given off. In order to study the behaviour of the salt at a higher tem- perature some of the salt was placed in a small platimm tube closed at one end and dried for several hours at 230-250.O The closed end of the tube was heated then with a Bunsen flame. ‘ Long before the tube became red ~ota gas began to be evolved having the characteristic odour of fluorine and liberating iodine in crystals from potassium iodide paper held at the exit of the gas. Fumes of hydro0uoric acid issued from the nose after 4 TRANSACTIONS OF THE [OCT. 1, inhaling and eshaling the gas. Some small crystals of silicon were placed in the open end of the tube, and when the closed encl of the tube was heated the silicon burnt with vivid incandes- cence and even with explosive violence (Moissan’s test for fluor- ine). The residue is white or slightly yellow but care must be taken to exclude-moisture, for when water vapour comes into contact with the heated salt, hardly any fiuorine is given off, and a brown cleliqnescent residue is left. This esperiment has been repeated sereral times, and it con- firms the accuracy of the results obtained by me 13 years ago, viz.: that fluorine may be obtaincd on heating some higher fluorides. Although Moissan has since then obtained free fluorine by a physical method. we have here the first triist- worthy chemical process of obtaining this gas. If potassinni fluoplumbate loses its hydrogen fluoricle at about 230° without losing more than traces of fluorine, one gram of the salt should yield on heating 47 c. c. of fluorine which could be freed from any hydrogen fluoride present by passing it over potassium flnoride, according to Moissxn. Qualitative esperiments have shown that a whole series of jluoplztmbates exist, the metals forming them being the same as those in Marignac’s series of flnostannates, but unfortun- ately the work is connected with great experimental difficulties, for some of the salts we clecomposecl by moisture as soon as they are taken out of the mother liquor. FLUOPLUMBIC ACID AND LEAD TETRAFLUORIDE. Fluoplumhic acid is obtained either on dissolving some forms of hydrated lead dioxide in hydroflnoric acid or on dissolving lead tetra-acetate in strong hydroflnoric acid, acetic acid being liberated in this case, for on adding soluble fluorides to this solution it gives the corresponding fluoplumhates. This solu- tion, however, cannot be evaporated to dryness, even at the ordinary temperature, a crust of the brown lead dioxide being deposited. In order to prepare anhydrous lead tetraJluoride potassium fluoplumbate was reduced to a fine powder in a platinum basin, using a small platinum crucible as a pestle; a dry‘agate mortar cannot be used, for in contact with silica the salt gives silicdn tetrafloride, water being formed which- at once decomposes the salt. The powdered salt (0.874 grm.) was then thrown on the surface of cold, concentrated sulphuric acid (5 cc.). Hydrogen fluoride at once escapes and a pale yellow solution is obtained, having the same characteristic color as that of lead tetrachlo- 1894.1 NEW PORK ACADEMY OF SCIENCES. 5 ri(le, which mas isolated by Friedrich in this laboratory. Dense f'uines soon begin to come otf, having an extremely pungent smell which resembles that of free fluorine. They seem to contain some gaseous lead tetrafluoride. After the salt has completely dissolved in the acid : 3KF.HF.PbF4t 3H2S0,= 4HFt3KHS04+PbF4, the clear yellow liquid begins to get turbid, and after half an hour or so it is converted into a thick lemon-yellow jelly. From this emulsion, which probably con- tains the colloclial modification of lead tetrafluoride, the latter cannot be separated at the ordiiiary temperature. On heating the mass to loo0, some hydrotlooric acid escapes, and n heavy, lemon-yellow powder is deposited on the bottom of the crucible, this probably being another modification of lead tetrafluoride. The sulphuric acid could be easily poured off from the yellow precipitate, and it mas found that the acid contains no lead in solution. The yellow powder could be washed with sulphuric acid by decantation, and no apparent change took place on heating the m(xture to looo. But as soon as it was heated to 115O, complete decomposition took place and white lead sulphate was left at the bottom of crucible : PbF4+H,S04=PbS04S2HFS F 2 m. I have not yet been able to isolate lead tetrafluoride, in spite of numerous attempts, as no liquid could be found which would displace the sulphuric acid without at the same time decompos- ing the tetrafluoride.
Load more

Recommended publications
  • American Chemical Society
    VOL. XLI. No. IO. THE JOURNAL OF THE American Chemical Society with which has been incorporated the American Chemical Journal (Founded by Ira Reinsen) [CONTRIBUTIONPROM THE CHEMICALLABORATORY OF VANDERBILT UNIVERSITY.] A CRITICAL STUDY OF THE POTASSIUM AND SODIUM DOUBLE SALTS OF LEAD TETRAFLUORIDE AS SOURCES OF FLU0RINE.l BY GEORGEL. CLARK. Received April 9, 1919. The only strictly chemical method for the preparation of free fluorine which has shown satisfactory possibilities up to the present time is the decomposition of the double salt tripotassium lead hydrogen octafluoride 3KF.HF.PbF4, by heat. This compound was prepared in pure con- dition and studied for the first time by Brauner,2 who showed that the molecule of hydrogen fluoride could be completely removed at tem- peratures below 250', and that fluorine is evolved above 250'. In recent years doubts have been expressed by some chemists that such a discovery was really in accordance with the facts. By using this method, however, it has been found possible in the researches to be described 1 Published by permission of the Director of the Chemical Warfare Service. The general problem of the preparation and use of tripotassium hydrogen lead octafluoride was suggested by Captain A. B. Ray, and the investigations begun under his supervision and with the assistance of Messrs. I. M. Colbeth and J. H. Card, at the American University Experiment Station, Washington, D. C. The intensive solubility measurements, and all of the work on disodium lead hexafluoride were subsequently carried on by the author independently. J. Chenz. Soc., 65, 393 (1894). I478 GEORGE I,.
    [Show full text]
  • Pp-03-25-New Dots.Qxd 10/23/02 2:38 PM Page 464
    pp-03-25-new dots.qxd 10/23/02 2:38 PM Page 464 464 LEAD CARBONATE, BASIC / LEAD CHROMATE LEAD CARBONATE, BASIC [1319-46-6] Formula: Pb(OH)2•2PbCO3; MW 775.60; phase rule study indicates the exis- tence of basic lead carbonates of other compositions: 3PbO•5PbCO3; PbO•PbCO3; 2PbO•PbCO3 Synonyms: white lead; basic carbonate Uses White lead, in the basic carbonate form, was used extensively as white pig- ment in paint until its toxic properties became known. At present, most of its pigment applications are as red-reflecting pigment in plastic sheets; in UV light-reflecting paints; in ceramic glaze; and in many temperature-sensitive inks that cause color change. Other applications include use as a catalyst in terephthalic acid reactions with diols; as a heat-sensitive stabilizer for poly vinyl chloride polymers; in lubricating grease, and as a curing agent to improve polyethylene wire insulation. Preparation Many commercial processes have been developed for manufacturing basic lead carbonate. These include: Thomson-Stewart process, Carter process, and Dutch process. The method of preparation involves treating lead with acetic acid vapors in the presence of carbon dioxide at 60°C. In the Thomson-Stewart process, finely divided lead monoxide or lead metal is mixed with water to give aqueous slurry, which is then mixed with acetic acid in the presence of air and carbon dioxide. All these processes are slow, taking weeks to obtain products of desired composition. Basic lead carbonate also is precipitated by dissolving lead monoxide in lead(II) acetate solution, and treating the solution with carbon dioxide.
    [Show full text]
  • THE FLUORIDES of PLATINUM and R E L a T E D Compounds by DEREK HARRY LOHMANN B.Sc, University of London, 1953 M.Sc, Queen's Univ
    THE FLUORIDES OF PLATINUM and related compounds by DEREK HARRY LOHMANN B.Sc, University of London, 1953 M.Sc, Queen's University, Ontario, 1959 A THESIS SUBMITTED IN PARTIAL FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in the Department of CHEMISTRY We accept this thesis as conforming to the required standard. THE UNIVERSITY OF BRITISH COLUMBIA October 1961, In presenting this thesis in partial fulfilment of the requirements for an advanced degree at the University of British Columbia, I agree that the Library shall make it freely available for reference and study. I further agree that- permission for extensive copying of this thesis for scholarly purposes may be granted by the Head of my Department or by his representatives. It is understood that copying or publication of this thesis for financial gain shall not be allowed without my written permission. Department of CHEMISTRY The University of British Columbia, Vancouver 8, Canada. Date 31st October 1961. %\\t Pntesttg of ^irtttslj Columbia FACULTY OF GRADUATE STUDIES PROGRAMME OF THE FINAL ORAL EXAMINATION FOR THE DEGREE OF DOCTOR OF PHILOSOPHY PUBLICATIONS oi . I. "Polar effects in Hydrogen abstraction reactions," M. P. Godsay, DEREK HARRY LOHMANN D. H. Lohmann and K. E. Russell, Chem. and Ind., 1959, 1603. B.Sc, University of London, 1953 M.Sc, Queen's University, Ontario, 1959 2. "Two new fluorides of Platinum," N. Bartlett and D. H. Lohmann, Proc. Chem. Soc, 1960, 14. TUESDAY, NOVEMBER 28th, 1961, AT 1:00 P.M. 3. "The reaction of 2,2-Diphenyl-l-Picrylhydrazyl with 9,10-Dihy- droanthracene and 1,4-Dihydronaphthalene," I.
    [Show full text]
  • D I C I O N Á R I O De Q U Í M I Ca
    7 2 8 2 53 2 5 6 6 18 18 d I 7 c i o N á r i O Iodo Nitrogênio Oxigênio 126.90447 14.0067 126.90447 de 92 2 11 2 8 8 18 8 32 2 21 9 Q U 2 í m i Ca Urânio Cálcio 238.02891 40.078 Inglês - Português Fernando José Luna DICIONÁRIO DE QUÍMICA INGLÊS - PORTUGUÊS 0 8 Fernando José Luna 0 8 Seropédica 2019 Reitor Ricardo Luiz Louro Berbara Vice-Reitor Luiz Carlos de Oliveira Lima Pró-Reitor de Pesquisa e Pós-Graduação Alexandre Fortes Pró-Reitora Adjunta de Pesquisa e Pós-Graduação Lucia Helena Cunha dos Anjos Conselho Consultivo: Adriana T. M. Lessa Lúcia Valadares Sartório Ana Maria Marques dos Santos Luiz Alberto de Lima Leandro Ana Paula Perrota Franco Manlio Silvestre Fernandes Biancca Scarpeline de Castro Márcio Rufino Silva Carmen Andriolli Maria Gracinda Carvalho Teixeira Christian Dutilleux Marta Cioccari Cláudia Mazza Rebeca Gontijo Teixeira Clézio dos Santos Simone Batista Danilo Bilate Tania Mikaela Garcia Roberto Débora Lerrer Vladimyr Lombardo Jorge Janaína Machado Simões Yllan de Mattos Oliveira Lígia Fátima Lima Calixto EDUR Editora da Universidade Federal Rural do Rio de Janeiro Br 465, Km. 7, Seropédica – RJ - CEP: 23.897-000 Telefone: (21) 2681-4711 Site: www.editora.ufrrj.br E-mail: [email protected] Relação das abreviações usadas neste dicionário: abr., abrev. abreviação adj. adjetivo LALQ alquimia amer. inglês americano BIO biologia BIOTEC biotecnologia CATAL catálise cf. confira CG cromatografia a gás CROMAT cromatografia DH Dicionário Houaiss ENG.QUÍM engenharia química FÍS física FOTQ fotoquímica G.QUÍM guerra química GEOQUÍM geoquímica ing.
    [Show full text]
  • 進工業グリーン調達ガイドライン 規程文書番号： M3028025-03 改定日： 2015 年 8 月 8 日
    進工業グリーン調達ガイドライン 規程文書番号： M3028025-03 改定日： 2015 年 8 月 8 日 1. 目的 このグリーン調達ガイドライン（以下「ガイドライン」という）は、進工業株式会社（以 下「進工業」という）の製品を構成する部品・デバイス等に含有される環境管理物質につ いて、使用を禁止する物質、全廃をめざす物質を明確にすることにより、材料供給者から 一般消費者までのサプライチェーンの中で、進工業製品への環境負荷物質の混入を防ぎ、 顧客への環境管理物質の出荷を防止し、法的遵守、地球環境保全および生態系に対する影 響を軽減することを目的とする。 2. 適用範囲 2.1 部品・材料への適用範囲 進工業が設計・製造及び製造委託したものが調達する部品、材料、その他の物品を対象 とする。これらは、このガイドラインに定める基準を満たすことを必要とする。 対象部品・材料など ・ 原材料（直接製品を構成する材料、外注加工を含む） ・ 副材料（製品を製造する上で主要構成材料ではないが完成時に残存が予想される 材料、外注加工を含む） ・ 半製品（進工業が委託した半製品基板など） ・ 部品 （コンデンサ、FPC、コネクター、ねじ等、進工業の製品に使用される部品） ・ 梱包材料（ダンボール、袋類、結束用紐、粘着テープ、その他包装材） 注）輸送業者または納入業者の管理下にあって、進工業から排出されることな く、回収・再使用される通箱等の包装材を除く 2.2 製品への適用範囲 （1）進工業が設計・製造し、販売、貸与または頒布する製品 （2）進工業が第三者に設計・製造を委託し、進工業の商標を付して販売、貸与または 頒布する製品 （3）進工業が第三者より購入し販売する製品 （ただし、顧客から指定された部品・材料は除く） 尚、このガイドラインにおいて規定されていない物質あるいはその用途であっても、各 国または地域の法令により使用が禁止または制限されているものについては、それらの法 令に従わなければならない。 3. 用語の定義 この「ガイドライン」では、以下のように用語を定義する。 （1）環境管理物質 国内 VT62474（Validation Team(検証チーム））にて定義される地球環境と人体に 著しい環境影響を持つとされる材料 及び、進工業が環境影響が大きいと判断した 材料。 4. 環境管理物質の管理基準 環境管理物質一覧表（Ｍ３０２８０３５） 参照 5. 供給者への要求事項 （１）この「ガイドライン」で規定された環境管理物質については、納入者において適 切な方法により含有量が把握され管理されなければならない。法規制等を遵守す るために特にきびしい管理を指定される対象物質について、進工業が要求する場 合は、許容含有量をクリアしていることが証明されなければならない。 （２）尚、証明する手段が測定データの場合は、毎年更新し進工業から要求があった場 合は遅滞なく提示しなければならない。 測定データには以下の内容を必ず記載のこと。 ①分析機関に関する情報 ・分析機関の名称、住所 ・分析担当者名、責任者 ・分析実施日（可能な場合には資料受領日も） ②分析依頼元に関する情報 ・依頼者（会社名・所属等） ③分析対象に関する情報 ・資料の種別と分析部位（金属、樹脂、クロメート、皮膜等の素材名及び分析 部位） ・部品等の型方（可能な場合は Lot No.） ・試料の種別ごとの分析対象物質 ④分析方法、装置等に関する情報 ・分析方法（準用規格がある場合は規格番号） ・分析限界値 ・測定フローチャート ⑤分析前処理に関する情報 ・推奨する分析方法での「個別報告事項」として記載された事項 ⑥濃度に関する情報
    [Show full text]
  • Hazardous Waste Management Guidebook
    Hazardous Waste Management Guidebook FOR UNIVERSTIY AT BUFFALO CAMPUS LABORATORIES Prepared By Environment, Health & Safety Services 220 Winspear Avenue Buffalo, NY 14215 Phone: 716-829-3301 Web: www.ehs.buffalo.edu UB EH&S Hazardous Waste Management Guidebook Table of Contents 1.0 PURPOSE ........................................................................................... 3 2.0 SCOPE ............................................................................................... 4 3.0 DEFINITIONS ...................................................................................... 4 4.0 RESPONSIBILITIES ............................................................................... 5 4.1 EH&S ................................................................................................... 5 4.2 Faculty, Staff, and Students ............................................................. 5 5.0 PROCEDURES ....................................................................................... 6 5.1 Hazardous Waste Determination ................................................... 6 5.1.1 Characteristic Hazardous Wastes .......................................... 7 5.1.2 Listed Hazardous Wastes ........................................................ 9 5.2 Satellite Accumulation of Hazardous Waste ............................ 9 5.2.1 Accumulation Areas ............................................................. 10 5.2.2 Requirements for Hazardous Waste Containers ................ 10 5.2.3 Segregation of Hazardous Wastes .....................................
    [Show full text]
  • Lead: Properties, History, and Applications Mikhail Boldyrev¹*, Et Al
    WikiJournal of Science, 2018, 1(2):7 doi: 10.15347/wjs/2018.007 Encyclopedic Review Article Lead: properties, history, and applications Mikhail Boldyrev¹*, et al. Abstract Lead is a chemical element with the atomic number 82 and the symbol Pb (from the Latin plumbum). It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and has a relatively low melting point. When freshly cut, lead is silvery with a hint of blue; it tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Lead is a relatively unreactive post-transition metal. Its weak metallic character is illustrated by its amphoteric nature; lead and its oxides react with acids and bases, and it tends to form covalent bonds. Compounds of lead are usually found in the +2 oxidation state rather than the +4 state common with lighter members of the carbon group. Exceptions are mostly limited to organolead compounds. Like the lighter members of the group, lead tends to bond with itself; it can form chains, rings and polyhedral structures. Lead is easily extracted from its ores; prehistoric people in Western Asia knew of it. Galena, a principal ore of lead, often bears silver, interest in which helped initiate widespread extraction and use of lead in ancient Rome. Lead production declined after the fall of Rome and did not reach comparable levels until the Industrial Revolution. In 2014, annual global production of lead was about ten million tonnes, over half of which was from recycling.
    [Show full text]
  • XXXVI.-Fl?Ioiplzsmbate.S Und Free Fluorine
    View Article Online / Journal Homepage / Table of Contents for this issue BZAUNER : FLUORPLUXBATES AhW FREE FLUORINE. 393 XXXVI.-Fl?ioiplzsmbatE.s und Free Fluorine. By BOHCSLAVBRAUSER, Ph.D., late Berkeley Fellow of Owens College, Professor of Chemistry in the Bohemian Unirersity, Prague. TWELVEyears ago (Trans., 1882,41, SS), the compounds CeF,H,O and 3KF,2CeF4,2H,0 were described by me, and it was shown that, when carefully heated, they lose their water, and then, if heated more strongly, they evolve fluorine, that is, a gas which smells of hypo- chlorous acid and decomposes potassium iodide with liberation of iodine.” About the same time (1882, Abstr., S), it was stated by me that similar compounds of quadrivalent lead had been prepared, but that I was unable to obtain them in a pure state. In the year lW5, Nikoljukin (Journ. Russ. Chem. SOC.,1885) announced the existence of a double salt of ammonium chloride with lead in w-hi2h the lead is present as tetrachloride. This salt was subsequently investigated (1887) in this laboratory by Friedrich, and lead tetrachloride mas obtained from it (1890, Abstr., 699). The salt has the formula 2NH,CI,PbC14 (Friedrich : Abstr., 1893, ii, 415 ; compare Classen and Zahorski, Abstr., 1893, ii, 464, and Wells, ibid., ii, 523). Another interesting compound of quadrivalent lead, the tetracetate, has been studied recently by Published on 01 January 1894. Downloaded by University of California - Santa Cruz 29/10/2014 23:32:19. Hutchinson and Pollard (Tra.ns., 1893, 63,1136).t The work on the fluorides of quadrivalent lead referred to above was taken up from time to time, but my laboratory not being arranged for this kind of work, the deleterious effects of hFdrofluoric acid often compelled me to postpone it.
    [Show full text]
  • Acetic Acid Toxic
    Chemical Waste Name or Mixtures: Listed Characteristic Additional Info Disposal Notes (-)-B- bromodiisopropinocampheyl (-)-DIP-Bromide Non Hazardous None liquid: sanitary sewer/ solid: trash borane (-)-B- chlorodiisopropinocampheylb (-)-DIP-Chloride Non Hazardous None liquid: sanitary sewer/ solid: trash orane [(-)-2-(2,4,55,7-tetranitro-9- fluorenyodeneaminooxy)pro (-)-TAPA Non Hazardous None liquid: sanitary sewer/ solid: trash pionic acid] (+)-B- bromodiisopropinocampheyl (+)-DIP-Bromide Non Hazardous None liquid: sanitary sewer/ solid: trash borane (+)-B- chlorodiisopropinocampheylb (+)-DIP-Chloride Non Hazardous None liquid: sanitary sewer/ solid: trash orane [(+)-2-(2,4,55,7-tetranitro-9- fluorenylideneaminooxy)prop (+)-TAPA Non Hazardous None liquid: sanitary sewer/ solid: trash ionic acid] (2,4,5-Trichlorophenoxy) Acetic Acid Toxic None EHS NA (2,4-Dichlorophenoxy) Acetic Acid Toxic None EHS NA trans-8,trans-10-dodecadien- (E,E)-8,10-DDDA Non Hazardous None liquid: sanitary sewer/ solid: trash 1-ol trans-8,trans-10-dodecadien- (E,E)-8,10-DDDOL Non Hazardous None liquid: sanitary sewer/ solid: trash 1-yl acetate trans-7,cis-9-dodecadien-yl (E,Z)-7,9-DDDA Non Hazardous None liquid: sanitary sewer/ solid: trash acetate (Hydroxypropyl)methyl Cellulose Non Hazardous None liquid: sanitary sewer/ solid: trash NA ammonium phosphate (NH4)2HPO4 Non Hazardous None liquid: sanitary sewer/ solid: trash (dibasic) (NH4)2SO4 Non Hazardous None liquid: sanitary sewer/ solid: trash ammonium sulfate ammonium phosphate (NH4)3PO4 Non Hazardous None
    [Show full text]
  • New Methods of Preparing Tripotassium Lead Hydrogen Octafluoride
    TRIPOTASSIUM LEAD HYDROGEN OGTAFLUOKIDB. 1309 NEW METHODS OF PREPARING TRIPOTASSIUM LEAD HYDROGEN OCTAFLUORIDE. BY FRANKC. MATEERS. Received February 20, 1920. Introduction. These experiments were made in connection with the problem of pre- paring free fluorine. Tripotassium lead hydrogen octafluoride evolves fluorine when heated above 300°, but the preparation of the octafluoride by the known methods was found to be slow and the yields were low. Therefore, new methods of preparing the salt were sought. The excellent paper by Clark1 gives complete working details of per- haps the best of the known methods. Potassium plumbate is first formed by heating a mixture of lead peroxide, potassium hydroxide and water. The residue is added to strong hydrofluoric acid and the pure salt, tri- potassium lead hydrogen. octafluoride, is obtained by crystallization of the filtrate. The review omitted the method2 of treating lead tetra- acetate with hydrofluoric acid and potassium hydrogen fluoride. This, however, is a slow and expensive method. Ruffa states that both the ammonium and the potassium double salts can he easily made but no de- tails of the method are given. Experimental. Action ob Anhydrous Hydrofluoric Acid upon Peroxides of Lead.--l,ead peroxide and red lead (Pb304)are apparently unactrd upon by the ordinary eonc. hydrofluoric acid (50%). However, the nearly anhydrous acid (960j00) acts readily upon the red lead or freshly prepared lead peroxide with formation of good yields of lead tetrafluoride in each case. The re- action with the red lead is very vigorous. The lead peroxide which is split off from the red lead dissolves very quickly in the anhydrous hydro- fluoric acid but the waste of the anhydrous acid in the formation of the lead difluoride is objectionable.
    [Show full text]
  • A Office 3,049,554 Paiented Aug
    --a Office 3,049,554 Paiented Aug. 14, 1962 2 3,049,554 above. The preferred compounds of our invention are 9,1-D HALOGENG-320-D2 KETOPRESNANES AND the 9c, 11,3-difluoropregnenes and pregnadienes. The di PRO CESSES FOR THER EAANUEFACTURE flucro compounds of the general formula having a 17 c.21 David H. Gould, Leonia, and Hans Reinana, Siocrified, dihydroxy function and in particular a A1-bond are highly N.J., assignors to Sciering Corporation, Soon fied, potent agents useful in the treatment of inflammations, N.J., a corporation of New Jersey burns and atopic dermatoses. No Drawing. Filled Juae i, 1959, Ser. No. 837,843 in olir co-pending application Serial No. 743,492, filed 9 (Ciaias. (C. 269-397.3) ine 20, 1958, now U.S. Patent No. 2,894,963, of which this application is a continuation-in-part, we described This invention relates to a novel class of halogenated 0. 9,11-dihalcgeno-4-pregnene-170,21-diol-3,20-diones and steroids which are therapeutically useful. More specifi the corresponding 1,4-pregnadienes wherein the more elec cally, our invention relates to a particular group of 9,11 tronegative atom appeared at C-11 in the case wherein dihalogenated pregnanes wherein the halogen atom at C-9 the 9- and 11-substituent were different. Due to the limi is at least as electronegative as the halogen substituent at tations of the process described in said application, com C-11. By the term pregnane series we mean pregnanes polinds containing fluorine at C-9, or in the case of a containing the A-3,20-diketo and A.-3,20 diketo systems.
    [Show full text]
  • Material Safety Data Sheet
    Material Safety Data Sheet Lead Tetrafluoride, 99% ACC# 46500 Section 1 - Chemical Product and Company Identification MSDS Name: Lead Tetrafluoride, 99% Catalog Numbers: AC278570000, AC278575000 Synonyms: PbF4; Lead Tetrafluoride. Company Identification: Acros Organics N.V. One Reagent Lane Fair Lawn, NJ 07410 For information in North America, call: 800-ACROS-01 For emergencies in the US, call CHEMTREC: 800-424-9300 Section 2 - Composition, Information on Ingredients CAS# Chemical Name Percent EINECS/ELINCS 7783-59-7 Lead Tetrafluoride 99 232-012-9 Section 3 - Hazards Identification EMERGENCY OVERVIEW Appearance: white crystals. Danger! Long-term exposure may cause bone and joint changes. Causes eye and skin irritation. May cause respiratory and digestive tract irritation. Danger of cumulative effects. Moisture sensitive. This product contains lead, a chemical known to the state of California to cause developmental effects. This product contains lead, a chemical known to the state of California to cause cancer. Target Organs: Central nervous system, none, skeletal structures. Potential Health Effects Eye: May cause eye irritation. May cause visual disturbances. Skin: Causes skin irritation. Ingestion: May cause gastrointestinal irritation with nausea, vomiting and diarrhea. Inorganic fluorides can be harmful. Acute exposure to fluorine compounds can lead to digestive tract burns, and abdominal pain. Exposure to fluoride compounds can result in systemic toxic effects on the heart, liver, and kidneys. It may also deplete calcium levels in the body leading to hypocalcemia and death. Fluoride can reduce calcium levels leading to fatal hypocalcemia. Ingestion of lead compounds can cause toxic effects in the blood-forming organs, kidneys and central nervous system.
    [Show full text]