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Multigram Chromatography-Free Synthesis of Octa (Ethylene Glycol) P
ORGANIC CHEMISTRY FRONTIERS View Article Online METHOD View Journal | View Issue Multigram chromatography-free synthesis of octa(ethylene glycol) p-toluenesulfonate† Cite this: Org. Chem. Front., 2016, 3, 1524 Adam M. Wawro,a Takahiro Muraoka,b,c Maho Katob and Kazushi Kinbara*b Here we report a detailed synthetic procedure for monodisperse octa(ethylene glycol) p-toluenesulfonate, Received 27th July 2016, a member of the heterobifunctional oligo(ethylene glycol) derivatives family. The method offers Accepted 3rd September 2016 completely chromatography-free workup and purification, resulting in higher yields and a lower cost than DOI: 10.1039/c6qo00398b any of the alternative strategies. We also introduce several upgrades, simplifying the method even more, rsc.li/frontiers-organic and discuss the chromatography-free design limitations. Introduction building blocks of functional compounds. Although tradition- ally PEGs have been produced by polymerization, yielding stat- Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Poly(ethylene glycol)s (PEGs) are frequently used in chemistry, istically distributed mixtures of individual polymer molecules, most notably for protein cross-linking and modification, the recent demand for more uniform PEGs has stimulated surface functionalization, and as flexible and hydrophilic studies on well-defined, single-molecule polymers. These PEGs, known as ‘discrete’, ‘unimolecular’ or ‘monodisperse’, consist of a single chemical species with a specific molecular a Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, weight. Monodisperse PEGs are obtained by classical step- 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan bSchool of Life Science and Technology, Tokyo Institute of Technology, by-step chemical synthesis, usually from inexpensive short 4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8501, Japan. -
Volumetric Labware Volumetric Labware
Volumetric Labware Volumetric Labware Volumetric Glassware NABL Certificate Please see list of Accreditation Bodies Worldwide from Page 148-151 38 Volumetric Labware In ASTM standards cylinders are now calibrated "to deliver" (TD), which has been recently introduce in Cylinder section. 39 Volumetric Labware BATCH CERTIFICATE Volumetric flasks comes with a batch certificate in which mean value, standard deviation is incorporated along with batch number like which signifies the month 01 and 10 is the year 01.10 This comes in a pack of 1 and comes along with the flask in the box you can also download it from www.glasscolabs.com and by scanning the QR Code from the label of the box. QR CODES ! Scan For Certicates Now On Cartons Of All Glassco Wares! Use your Smartphone to scan the QR Code on the box labels … Just select the Certicate you wish to see… Conformity… Calibration … (Individual or Batch) INDIVIDUAL CERTIFICATE These flasks comes with a certificate on which individual serial number, mean value, standard deviation and measured uncertainty is given along with the batch number and serial number like 01.10 (Month and year of manufacturing) 505 (serial number) 01.10 5 0 5 This comes in a pack of one and each flask is having a certificate with it in the box you can also download it from www.glasscolabs.com and by scanning the QR Code from the label of the box. USP Glassware All the volumetric glassware or measuring instruments to be used in laboratories which are under surveillance of US authorities such as Food and Drug Administration (FDA), have a mandatory requirement to use products which adhere to standards set by US PHARMACOPEIA. -
Reducible Sulfur in Paper and Paperboard (Revision of T 406 Om-08) (No Changes from Draft 2)
NOTICE: This is a DRAFT of a TAPPI Standard in ballot. Although available for public viewing, it is still under TAPPI’s copyright and may not be reproduced or distributed without permission of TAPPI. This draft is NOT a currently published TAPPI Standard. WI 120802.02 T 406 DRAFT NO. 3 DATE April 30, 2013 WORKING GROUP CHAIRMAN James C. Abbott SUBJECT CATEGORY Chemical Properties RELATED METHODS See “Additional Information” CAUTION: This Test Method may include safety precautions which are believed to be appropriate at the time of publication of the method. The intent of these is to alert the user of the method to safety issues related to such use. The user is responsible for determining that the safety precautions are complete and are appropriate to their use of the method, and for ensuring that suitable safety practices have not changed since publication of the method. This method may require the use, disposal, or both, of chemicals which may present serious health hazards to humans. Procedures for the handling of such substances are set forth on Material Safety Data Sheets which must be developed by all manufacturers and importers of potentially hazardous chemicals and maintained by all distributors of potentially hazardous chemicals. Prior to the use of this method, the user must determine whether any of the chemicals to be used or disposed of are potentially hazardous and, if so, must follow strictly the procedures specified by both the manufacturer, as well as local, state, and federal authorities for safe use and disposal of these chemicals. Reducible sulfur in paper and paperboard (Revision of T 406 om-08) (no changes from Draft 2) 1. -
Sulfur Dioxide
Corn Sugar (crude & refined) Analysis F-54-1 SULFUR DIOXIDE PRINCIPLE Sulfur dioxide is released by boiling an acidic sample solution, and it is removed by sweeping with a stream of nitrogen. The gas stream is passed through dilute hydrogen peroxide solution where sulfur dioxide is oxidized to sulfuric acid. The acid is titrated with standard alkali. (Note 1) SCOPE The method applies to crude and refined sugars (Note 2) and, with minor modification, to most liquid and solid samples even in the presence of other volatile compounds. SPECIAL APPARATUS 1. The FDA modified "Monier-Williams" apparatus (Figure 1) is available from Fisher Scientific, 91/92 Cat. No. K513800 (Kontes 513800), Pittsburgh, PA, and affiliates worldwide. It or some of its parts are also available from other laboratory supply houses. (Note 3) 2. Heating mantle, for a 1000 mL boiling flask, controlled by a variable transformer. 3. Flow controlling valve, with flow indicator, capable of controlling nitrogen gas flow to 200 mL/min. 4. Refrigerated, circulating bath capable of maintaining flow through condenser at 5-10 °C (Note 4) 5. Vortex mixer 6. Buret, class A, 10 mL 7. Pipet bulb Analytical Methods of the Member Companies of the Corn Refiners Association, Inc. Accepted 11-13-61 Revised 4-9-91 Corn Sugar (crude & refined) Analysis F-54-2 SULFUR DIOXIDE ⎯ continued REAGENTS 1. Hydrogen Peroxide Solution, 3%: Dilute 10 mL of C.P. neutral 30% hydrogen peroxide (H2O2) with purified water to 100 mL. Prepare daily. 2. Sodium Hydroxide Solution, 0.01 N: Dilute 10 mL of 0.100 N NaOH solution to 100 mL. -
Azoniaspiro Salts: Towards Bridging the Gap Between Room-Temperature Ionic Liquids and Molten Salts
Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics. This journal is © the Owner Societies 2016 Azoniaspiro salts: towards bridging the gap between room-temperature ionic liquids and molten salts Matthew T. Clough,a,b Karolin Geyer,c Patricia A. Hunt,*a Alastair J. S. McIntosh,a Rebecca Rowe,a Tom Welton*a and Andrew J. P. Whitea a Department of Chemistry, Imperial College London, London, UK, SW7 2AZ, United Kingdom b Max-Planck-Institut für Kohlenforschung, 45470 Mülheim-an-der-Ruhr, Germany c BASF SE, Ludwigshafen, Germany * Corresponding Authors: [email protected] [email protected] Electronic Supplementary Information 1. General laboratory procedures 2 2. Synthesis of ionic compounds 2 3. TGA procedures 8 4. TGA-MS procedures 9 5. TGA-GCMS procedures 9 6. X-Ray Crystallography procedures and data 10 7. Computational methods 12 8. Ion pair conformers and transition state structures 13 1 1. General laboratory procedures All reactions requiring an inert atmosphere were performed under a blanket of nitrogen gas, which was dried through a column of phosphorus pentoxide. All commercially acquired chemicals were obtained from Sigma- Aldrich or Tokyo Chemical Industry, and were used without further purification unless otherwise stated. Anhydrous solvents were dried through an HPLC column on an Innovative Technology Inc. solvent purification system. NMR spectra were recorded on Bruker Avance-400 (1H NMR (400 MHz), 13C (100 MHz), 19F (376 MHz)) NMR spectrometers. Chemical shifts are reported in ppm (relative to the DMSO-d6 residual peak). IR spectra were recorded on a Perkin Elmer spectrum 100 FTIR using an ATR inset with a diamond crystal. -
Chemistry Lab Course
Chemistry Lab Course Kantonsschule Zürich Nord Tilmann Geldbach 2015/2016 Chemistry Lab 2 Preface The aim of this lab course is that you learn how to conduct simple chemical experiments and how to document these experiments. You should learn to carefully observe and – based on these observations – come up with explanations and hypotheses about what you have seen. During the course you will learn basic lab techniques, the proper use of standard equipment as well as how to handle harmful chemicals. Organisation It is expected that you have studied the lab instructions of the current experiment before the lesson has started. Remaining questions can be clarified before the lab session starts. In most cases you will be working in pairs. You should always take notes on what you are doing and on what can be observed. There is a work sheet for most of the experiments. You should return this work sheet at the end of the lab session or unasked in the next theory lesson at the latest. These work sheets will be graded with bonus points. The lab should be fun! Therefore make an effort to create an atmosphere that is pleasant both to you and your classmates. You should help each other both during the experiments and during clean-up. Not all substances that are used in the lab are harmless. Pay attention to the safety instructions below and on the sheets of the respective experiment. Safety There are essentially three ways in which a chemical substance may enter your body: by oral uptake, by inhalation or by absorption through the skin. -
PIRANHA SOLUTION CLEANING Rev
Section 4: Laboratory SOPs – Procedure Form Title: PIRANHA SOLUTION CLEANING Rev. Date: 08/06/18 Prepared By: P.I.: Prior Approval: This procedure is considered hazardous enough that prior approval is needed from the Principal Investigator: Y N Involves Use of Particularly Hazardous Substance (PHS)? Y N Carcinogen Reproductive Toxin High Acute Toxicity Does this procedure require medical surveillance? Y N Does this require use of a fit-tested respirator? Y N A Piranha solution is a mix of concentrated sulfuric acid with hydrogen peroxide, and generally used to Bremoverief Description organic residues of Procedure from substrates. (100 wordsSee prep or below: less): 1. Transfer sulfuric acid to a large, clean Pyrex glass beaker. (NO PLASTIC CONTAINERS) 2. Slowly add 1 part 30% hydrogen peroxide to 3 parts concentrated sulfuric acid inside a chemical fume hood using PPE described below. Use a dropping funnel to add hydrogen peroxide to sulfuric acid with continuous stirring. (use a Teflon coated stir bar) 3. Slowly place clean microscope slides and coverslips into the solution for 1 hour using long tongs to avoid skin exposure. 4. Remove slides/coverslips with tongs and sonicate in milliQ water for 10 minutes. 5. Allow piranha solution to cool to room temperature in an open container. 6. Transfer cooled solution to a clean and dry vented waste container for disposal. Safety Notes: All piranha manipulations shall be conducted inside a properly functional chemical fume hood. Keep all containers in secondary containment at all times. Prepare solution immediately before use. Avoid all contact between piranha solution and organic materials. -
United States Patent Office Patented Jan
3,297,633 United States Patent Office Patented Jan. 10, 1967 1. 2 maximum of seventy weight percent of 4,4'-bis(hydroxy 3,297,633 phenyl)-methane. PREPARATION OF POYESTERS WITH LOW MET The diacid halides of aromatic dicarboxylic acids which WISCOSITY FROM A. MIXTURE OF BISPHENOL can be used in the polycondensation according to the in RaymondSOMERS R. Hindersian, Lewiston, N.Y., and Andrée Jan vention can be obtained by the reaction of aromatic di Conix, Hove-Antwerp, Belgium; said Hindersinn as carboxylic acids with thionyl chloride. Suitable aromatic signor to Hooker Chemical Corporation, Niagara Falls, dicarboxylic acids are among others: N.Y., a corporation of New York, and Said Consix as terephthalic acid signorgium, a to Belgian Gevaert company Photo-Producten N.V., Mortsel, Bel isophthalic acid No Drawing. Filed July 25, 1962, Ser. No. 212,457 O phthalic acid 5 Claims. (C. 260-47) bis(4-carboxy)-diphenyl bis(4-carboxyphenyl)-ether It is known to prepare linear polyesters by polycondens bis(4-carboxyphenyl)-sulphone ing a metal diphenate of a bisphenol of the formula: bis(4-carboxyphenyl)-carbonyl HO-Ar-R-Ar-OH bis(4-carboxphenyl)-methane with a diacid halide of an aromatic dicarboxylic acid of bis(4-carboxyphenyl)-dichloromethane 1,2- and 1,1-bis(4-carboxyphenyl)-ethane the formula: 1,1- and 2,2-bis(4-carboxyphenyl)-propane HOOC-Ar-R-Ar-COOH 1,1- and 2,2-bis(3-carboxyphenyl)-propane wherein each of Ar and Ar' represents a p-phenylene 20 2,2-bis(4-carboxyphenyl)-1,1-dimethyl-propane radical, a m-phenylene radical, one of R and R -
Electronic Supplementary Material (ESI) for Inorganic Chemistry Frontiers. This Journal Is © the Partner Organisations 2020
Electronic Supplementary Material (ESI) for Inorganic Chemistry Frontiers. This journal is © the Partner Organisations 2020 Supplementary material Triple-pyridyl iron complexes for in vivo photoacoustic imaging Pan Xiang, ‡ab Yu Shen, ‡c JieShen,c Zhihui Feng,c Min Sun,a* Qiong Zhang,c Shengli Li,c Dandan Li,c Guilong Zhang,e Zhengyan Wu,e YupengTian,c Zhongping Zhang,bd Xiaohe Tianab* aSchool of Life Science, Anhui University, Hefei 230601, P. R. China. bInstitute of Physical Science and Information Technology, Anhui University, Hefeii 230601, P. R. China. cDepartment of Chemistry, Anhui Province Key Laboratory of Chemistry for Inorganic/Organic. Hybrid Functionalized Materials, Anhui University, Hefei 230601, P. R. China. dCAS Center for Excellence in Nanoscience, Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230000, P. R. China. eKey Laboratory of High Magnetic Field and Ion Beam Physical Biology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P.R. China, [email protected] E-mail address: [email protected], [email protected] ‡These authors contributed equally to this work and should be considered co-first authors. 1 Table of Content Materials and apparatus......................................................................................................................3 Synthetic procedures ..........................................................................................................................3 Computational details ........................................................................................................................6 -
Laboratory Glassware — Separating Funnels and Dropping Funnels
BRITISH STANDARD BS ISO 4800:1998 Laboratory glassware— Separating funnels and dropping funnels ICS 71.040.20 BSISO4800:1998 National foreword This BritishStandard reproduces verbatim ISO4800:1998 and implements it as the UK national standard. It supersedes BS2021:1980 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee LBI/36, Laboratory glassware and related apparatus, to Subcommittee LBI/36/2, General laboratory glass and plastics ware, which has the responsibility to: — aid enquirers to understand the text; — present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; — monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The BritishStandards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO title page, pagesii to iv, pages1 to6, an inside back cover and abackcover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. -
Corrosives- Strong Acids
1 Corrosives – Strong Acids Chemical Class Standard Operating Procedure Corrosives- Strong Acids H290 H314 H315 H316 H318 H319 H320 This SOP is not a substitute for hands-on training. Print a copy and insert into your laboratory SOP binder. Department: Chemistry Date SOP was written: Thursday, July 1, 2021 Date SOP was approved by PI/lab supervisor: Thursday, July 1, 2021 Name: F. Fischer Principal Investigator: Signature: ______________________________ Name: Matthew Rollings Internal Lab Safety Coordinator or Lab Manager: Lab Phone: 510.301.1058 Office Phone: 510.643.7205 Name: Felix Fischer Emergency Contact: Phone Number: 510.643.7205 Tan Hall 674, 675, 676, 679, 680, 683, 684 Location(s) covered by this SOP: Hildebrand Hall: D61, D32 1. Purpose This SOP covers the precautions and safe handling procedures for the use of Corrosives - Strong Acids. For a list of Corrosives - Strong Acids covered by this SOP and their use(s), see the “List of Chemicals”. Procedures described in Section 12 apply to all materials covered in this SOP. A change to the “List of Chemicals” does not constitute a change in the SOP requiring review or retraining. If you have questions concerning the applicability of any recommendation or requirement listed in this procedure, contact the Principal Investigator/Laboratory Supervisor or the campus Chemical Hygiene Officer at [email protected]. 2. Physical & Chemical Properties/Definition of Chemical Group A strong acid is one that completely ionizes (dissociates) in an aqueous solution. (See Appendix for a complete list of Strong Acids.) Rev. Date: 2021-06-29 2 Corrosives – Strong Acids Chemical Class Standard Operating Procedure 3. -
A-Ag185e.Pdf
FI:DP/CPR/88/077 Field Document 9 December 1990 PEOPLE'S REPUBLIC OF CHINA EQUIPMENT REQUIREMENTS Report prepared for the project Fisheries development in Qinghai Province People's Republic of China by C.J. Smith Consultant FOOD AND AGRICULTURE ORGANIZATION OF THE UNITED NATIONS Rome, 1990 TABLE OF CONTENTS Page 1 INTRODUCTION AND TERMS OF REFERENCE 1 2 CURRENT STATUS OF EQUIPMENT 1 3 CURRENT STATUS OF PERSONNEL 1 Appendix I EQUIPMENT CURRENTLY AT THE INSTITUTE OF AQUATIC 3 PRODUCTS Appendix II: SPECIFICATIONS - LOTS 1-11 4 1. INTRODUCTION AND TERMS OF REFERENCE The project aims to assist development of fish production in Qinghai Province in two ways: by producing a management plan for the important naked carp fishery on Qinghai Lake and by demonstration of the technology of rainbow trout culture. This report identifies the equipment and monitoring requirements of the project by the assessment of: – the current equipment status of the laboratory of the Institute of Aquatic Products, Xining City, Qinghai Province, People's Republic of China – the equipment requirements of the project to enable a basic limnological investigtion to be undertaken in line with the objectives of the project. As part of the project operations, FAO assigned Mr C.J. Smith as consultant from 6 September to 25 October 1989. After consul-tations with project Chief Technical Adviser, Mr David Edwards and with FAO HQ staff in Rome the consultant's terms of reference were modified to take account of the above requirements. 2. CURRENT STATUS OF EQUIPMENT The laboratory at the Institute of Aquatic Products is in a dilapidated condition; however, there are number of old but functional pieces of equipment (listed in Appendix ]).