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Chapter 3.3 Special Provisions Applicable to Certain Articles Or Substances
Chapter 3.3 Special provisions applicable to certain articles or substances 3.3.1 When Column (6) of Table A of Chapter 3.2 indicates that a special provision is relevant to a substance or article, the meaning and requirements of that special provision are as set forth below. 16 Samples of new or existing explosive substances or articles may be carried as directed by the competent authorities (see 2.2.1.1.3) for purposes including: testing, classification, research and development, qual- ity control, or as a commercial sample. Explosive samples which are not wetted or desensitized shall be limited to 10 kg in small packages as specified by the competent authorities. Explosive samples which are wetted or desensitized shall be limited to 25 kg. 23 Even though this substance has a flammability hazard, it only exhibits such hazard under extreme fire conditions in confined areas. 32 This substance is not subject to the requirements of RID when in any other form. 37 This substance is not subject to the requirements of RID when coated. 38 This substance is not subject to the requirements of RID when it contains not more than 0.1% calcium carbide. 39 This substance is not subject to the requirements of RID when it contains less than 30% or not less than 90% silicon. 43 When offered for carriage as pesticides, these substances shall be carried under the relevant pesticide entry and in accordance with the relevant pesticide provisions (see 2.2.61.1.10 to 2.2.61.1.11.2). 45 Antimony sulphides and oxides which contain not more than 0.5% of arsenic calculated on the total mass are not subject to the requirements of RID. -
Indiana State University ISU Laboratory Safety Guideline
ISU Laboratory Safety Guideline Working with Organic Peroxides and Storage Guidelines Date: December 2012 Indiana State University Organic peroxide is a compound containing the -O-O- structure and is considered a structural derivative of hydrogen peroxide. Organic peroxides are one of the most hazardous materials handled in the laboratory. These peroxides are low powered explosives that are sensitive to shock, sparks or other accidental ignition due to the weak –O-O bond. Organic compounds such as ethers can react with oxygen to form unstable peroxides. Peroxide formation can also occur under normal storage conditions when compounds become concentrated by evaporation or when mixed with other compounds. Types of Compounds known to form peroxides : Ethers containing primary and secondary alkyl groups (never distill an ether before it has been shown to be free of peroxide) Compounds containing benzylic hydrogens Compounds containing allylic hydrogens (C=C-CH) Compounds containing a tertiary C-H group (e.g., decalin and 2,5-dimethlyhexane) Compounds containing conjugated, polyunsaturated alkenes and alkynes (e.g., 1,3-butadiene, vinyl acetylene) Compounds containing secondary or tertiary C-H groups adjacent to an amide (e.g., 1-methyl-2- pyrrolidinone Prudent Practices in the Laboratory: Handling and Management of Chemical Hazards, Updated Version General Procedures for working with Peroxide-forming chemicals: • Be aware of the use of peroxide-forming chemicals when designing or conducting a new experiment. • If possible, purchase material containing an inhibitor such as butylated hydroxytoluene (BHT). • Date the container when received, opened and tested. • Consult Prudent Practices or other resources for storage shelf-life and testing procedures. -
Peroxide-Forming Chemicals
Peroxide-Forming Chemicals 4 Ways to stop explosions, injuries, and added expenses: 1) Track shelf life A) label when tested and when to retest B) date when received 2) Handle with proper personal protective equipment A) gloves B) googles/safety glasses C) flame-resistant lab coat D) training E) Ask [the Dept. of Chemistry and Dept. of Environmental Health & Safety] for help 3) Store properly A) flammable storage cabinet if applicable B) avoid i) heat (keep in a cool place) ii) impact iii) friction iv) light (keep in a dark place) 4) Buy the right amount A) based on what will be used B) reduce the disposal of any un-used material (Dubiel). The Department of Chemistry wants you to learn from our experiences. Amides, Dioxane, Ethers, secondary alcohols, and Tetrahydrofuran (as well as other cyclic ethers) must be checked for peroxides. The University of Pittsburgh Department of Environmental Health and Safety (EH&S) recommends that all peroxide-forming chemicals should be tested every six months for peroxide content, and any chemicals that test positive should either be purified before use to remove the peroxide or discarded as chemical waste and replaced with fresh material. (http://www.ehs.pitt.edu/assets/docs/peroxide-forming.pdf). Ken Migliorese, a previous staff member, emailed the Department of Chemistry to remind us of the importance of doing peroxide testing on a regular basis. The need to test for peroxides was made clear to us by a series of unfortunate explosions which occurred in the undergraduate organic teaching labs in 2008. We had multiple defective layers of protection that caused failures of safety measures and three catastrophic errors (Reason). -
Peroxide Forming Chemicals
What are organic peroxides? Organic peroxides are a class of compounds that have unusual stability problems that make them among the most hazardous substances found in the laboratory. The lack of stability is due to the presence of an oxidation and reduction center within the same molecule. R-O-O-R R = organic side chains O-O = Peroxo bridge As a class, organic peroxides are considered to be powerful explosives and are sensitive to heat, friction, impact, light, as well as to strong oxidizing and reducing agents. Peroxide formers react with oxygen even at low concentrations to form peroxy compounds. Autoxidation of organic material proceeds by a free-radical chain mechanism and commonly affects organic solvents. R-H R- R-O-O R-O-O-R (In the presence of oxygen) The instability of the molecule (R-O-O-R) can cause auto-decomposition simply by bumping or jarring the container, addition of heat, light, or opening the cap. The risk associated with the peroxide increases if the peroxide crystallizes or becomes concentrated by evaporation or distillation. Peroxide crystals may form on the container plug or the threads of the cap and detonate as a result of twisting the lid. Classes of Peroxide Formers Aldehydes Ethers - especially cyclic ethers and those containing primary and secondary alcohol groups Compounds containing benzylic hydrogen atoms (particularly if the hydrogens are on tertiary carbon atoms) Compounds containing the allylic structure, including most alkenes. Vinyl and vinylidene compounds. Preventing Formation of Organic Peroxides No single method of inhibition of peroxide formation is suitable for all peroxide formers. -
Hazardous Material Inventory Statement
City of Brooklyn Park FIRE DEPARTMENT 5200 - 85th Avenue North Brooklyn Park MN 55443 Phone: (763)493-8020 Fax: (763) 493-8391 Hazardous Materials Inventory Statement Users Guide A separate inventory statement shall be provided for each building. An amended inventory statement shall be provided within 30 days of the storage of any hazardous materials or plastics that changes or adds a hazard class or which is sufficient in quantity to cause an increase in the quantity which exceeds 5 percent for any hazard class. The hazardous materials inventory statement shall list by hazard class categories. Each grouping shall provide the following information for each hazardous material listed for that group including a total quantity for each group of hazard class. 1. Hazard class. (See attached Hazardous Materials Categories Listing) 2. Common or trade name. 3. Chemical Abstract Service Number (CAS number) found in 29 Code of Federal Regulations (C.F.R.). 4. Whether the material is pure or a mixture, and whether the material is a solid, liquid or gas 5. Maximum aggregate quantity stored at any one time. 6. Maximum aggregate quantity In-Use (Open to atmosphere) at any one time. 7. Maximum aggregate quantity In-Use (Closed to atmosphere) at any one time. 8. Storage conditions related to the storage type, high-pile, encapsulated, non-encapsulated. Attached is a listing of categories that all materials need to be organized to. Definitions of these categories are also attached for your use. At the end of this packet are blank forms for completing this project. For questions regarding Hazardous Materials Inventory Statement contact the Fire Department at 763-493-8020. -
Organic Peroxide and OH Formation in Aerosol and Cloud Water
Discussion Paper | Discussion Paper | Discussion Paper | Discussion Paper | Atmos. Chem. Phys. Discuss., 15, 17367–17396, 2015 www.atmos-chem-phys-discuss.net/15/17367/2015/ doi:10.5194/acpd-15-17367-2015 ACPD © Author(s) 2015. CC Attribution 3.0 License. 15, 17367–17396, 2015 This discussion paper is/has been under review for the journal Atmospheric Chemistry Organic peroxide and and Physics (ACP). Please refer to the corresponding final paper in ACP if available. OH formation in aerosol and cloud Organic peroxide and OH formation in water aerosol and cloud water: laboratory Y. B. Lim and B. J. Turpin evidence for this aqueous chemistry Title Page Y. B. Lim and B. J. Turpin Abstract Introduction Department of Environmental Sciences, Rutgers University, New Brunswick, NJ 08901, USA Conclusions References Received: 29 May 2015 – Accepted: 01 June 2015 – Published: 25 June 2015 Tables Figures Correspondence to: Y. B. Lim ([email protected]) J I Published by Copernicus Publications on behalf of the European Geosciences Union. J I Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion 17367 Discussion Paper | Discussion Paper | Discussion Paper | Discussion Paper | Abstract ACPD Aqueous chemistry in atmospheric waters (e.g., cloud droplets or wet aerosols) is well 15, 17367–17396, 2015 accepted as an atmospheric pathway to produce secondary organic aerosol (SOAaq). Water-soluble organic compounds with small carbon numbers (C2-C3) are precursors 5 for SOAaq and products include organic acids, organic sulfates, and high molecular Organic peroxide and weight compounds/oligomers. Fenton reactions and the uptake of gas-phase OH rad- OH formation in icals are considered to be the major oxidant sources for aqueous organic chemistry. -
Peroxides and Peroxide- Forming Compounds
FEATURE Peroxides and peroxide- forming compounds By Donald E. Clark Bretherick5 included a discussion of nated. However, concentrated hydro- organic peroxide5 in a chapter on gen peroxide (Ͼ30%), in contact with norganic and organic peroxides, highly reactive and unstable com- ordinary combustible materials (e.g., because of their exceptional reac- pounds and used “oxygen balance” to fabric, oil, wood, or some resins) Itivity and oxidative potential are predict the stability of individual com- poses significant fire or explosion haz- widely used in research laboratories. pounds and to assess the hazard po- ards. Peroxides of alkali metals are not This review is intended to serve as a tential of an oxidative reaction. Jack- particularly shock sensitive, but can 6 guide to the hazards and safety issues son et al. addressed the use of decompose slowly in the presence of associated with the laboratory use, peroxidizable chemicals in the re- moisture and may react violently with handling, and storage of inorganic and search laboratory and published rec- a variety of substances, including wa- organic peroxy-compounds and per- ommendations for maximum storage ter. Thus, the standard iodide test for oxide-forming compounds. time for common peroxide-forming peroxides must not be used with these The relatively weak oxygen-oxygen laboratory solvents. Several solvents, water-reactive compounds.1 linkage (bond-dissociation energy of (e.g., diethyl ether) commonly used in Inorganic peroxides are used as ox- 20 to 50 kcal moleϪ1) is the character- the laboratory can form explosive re- idizing agents for digestion of organic istic structure of organic and inor- action products through a relatively samples and in the synthesis of or- ganic peroxide molecules, and is the slow oxidation process in the pres- ganic peroxides. -
United States
Patented Sept. 7, 1937 2,092,322 UNITED STATES PATENT of FICE 2,092,322 PROCESS FOR THE PRODUCTION OF OR GANC PEROXDES Franz Rudolf Moser, Amsterdam, Netherlands, assignor to Shell Development Company, San Francisco, Calif., a corporation of Delaware No Drawing. Application March 18, 1935, Serial No. 11,667. In the Netherlands September 14, 1934 12 Claims. (C. 260-16) This invention relates to processes of manu the latter "wetted' whereby its explosiveness is facturing organic peroxides and deals, particu greatly reduced. larly, with a novel, simplified method for eco My invention may be practiced with any suit nomically producing peroxides from ketones, able organic compound which forms peroxides 5 aldehydes, and the like. It is also concerned with by reaction with hydrogen peroxide. Suitable the production of new compositions of matter organic compounds which may be used as start comprising organic peroxides suitably 'wetted' ing material are, for example: aliphatic ketones, to reduce their explosiveness and make them of which acetone, methyl ethyl ketone, diethyl capable of safe handling, transportation and ketone, methyl isopropyl ketone, methyl second storage. ary butyl ketone, methyl tertiary butyl ketone 10 O The preparation of organic peroxides by the are typical: aromatic ketones such as aceto reaction of hydrogen peroxide upon ketones, phenone, benzo-phenone, benzyl-ethyl ketone, aldehydes, dialkyl sulfates, acid anhydrides, acid benzylnaphthyl ketone, and homologues and chlorides and the like is well known. Particu analogues thereof; aliphatic aldehydes, such as 5 larly with ketones and aldehydes, the reaction has formaldehyde, acetaldehyde, propionaldehyde, 15 been carried out in the presence of strong acids, isobutylaldehyde, methyl ethyl acetaldehyde, such as hydrochloric and sulfuric acids, while trimethyl acetaldehyde, and the like; aromatic maintaining a low temperature. -
Effects of Organic Peroxides on the Curing Behavior of EVA Encapsulant Resin*
Open Journal of Polymer Chemistry, 2012, 2, 77-85 http://dx.doi.org/10.4236/ojpchem.2012.22010 Published Online May 2012 (http://www.SciRP.org/journal/ojpchem) Effects of Organic Peroxides on the Curing Behavior of EVA Encapsulant Resin* Kanthamas Thaworn, Piyapong Buahom, Surat Areerat School of Chemical Engineering, Faculty of Engineering, King Mongkut’s Institute of Technology Ladkrabang, Bangkok, Thailand Email: [email protected] Received November 8, 2011; revised March 27, 2012; accepted April 15, 2012 ABSTRACT Compounds of poly(ethylene-co-vinyl acetate) (EVA with vinyl acetate content 33%) with three different organic per- oxides, namely, dialkyl peroxide, peroxyester peroxide, and peroxyketal peroxide, were prepared with a twin screws extruder and a two-roll mixing mill. The cure behavior of the EVA compounds was analyzed from rheographs, which were obtained by a moving die rheometer (MDR) at various curing temperatures between 150˚C to 170˚C. The effects of organic peroxides on cure behavior were examined. The dynamic curing obtained by the torque rheometer provided sufficient experimental data to show that dialkyl peroxide is not suitable because it has a high half-life temperature and its by-products can discolor the final product. Peroxyester peroxide is good for curing at temperatures in the range of 150˚C to 160˚C, which accomplished an ultimate cure within 5 to 8 minutes. Also, the peroxyketal peroxide has higher performance, which decreased the optimum cure time to 3 minutes. The thermal decomposition mechanism of organic peroxide was applied to explain how the cure behavior is affected by generated free radicals. -
A Sheffield Hallam University Thesis
Hydroboration of some organometallic systems. TOWERS, Christopher John. Available from the Sheffield Hallam University Research Archive (SHURA) at: http://shura.shu.ac.uk/20447/ A Sheffield Hallam University thesis This thesis is protected by copyright which belongs to the author. The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the author. When referring to this work, full bibliographic details including the author, title, awarding institution and date of the thesis must be given. Please visit http://shura.shu.ac.uk/20447/ and http://shura.shu.ac.uk/information.html for further details about copyright and re-use permissions. Z S 2 S Z 0 8 0 Sheffield City Polytechnic Library REFERENCE ONLY R6297 ProQuest Number: 10701093 All rights reserved INFORMATION TO ALL USERS The quality of this reproduction is dependent upon the quality of the copy submitted. In the unlikely event that the author did not send a com plete manuscript and there are missing pages, these will be noted. Also, if material had to be removed, a note will indicate the deletion. uest ProQuest 10701093 Published by ProQuest LLC(2017). Copyright of the Dissertation is held by the Author. All rights reserved. This work is protected against unauthorized copying under Title 17, United States C ode Microform Edition © ProQuest LLC. ProQuest LLC. 789 East Eisenhower Parkway P.O. Box 1346 Ann Arbor, Ml 48106- 1346 HYDROBORATION OF SOME ORGANOMETALLIC SYSTEMS CHRISTOPHER JOHN TOWERS A thesis submitted to the Council for National Academic Awards in partial fulfilment of the requirement for Ph.D. -
Organic Peroxides
Organic Peroxides 1. Process a. Working with and synthesizing organic peroxides. 2. Describe process, hazardous chemical, or hazard class a. An organic peroxide is a carbon-based compound containing a “peroxy” group (two oxygen atoms joined together -O-O-). All organic peroxides will burn vigorously, and once ignited will be difficult to extinguish. Some organic peroxides decompose very rapidly or explosively when exposed to heat, friction, mechanical shock, or contamination with incompatible materials. b. The Globally Harmonized System (GHS) of classification and labeling of chemicals has seven categories for organic peroxides, which are described below. i. Type A – An organic peroxide that can detonate or deflagrate rapidly; ii. Type B – An organic peroxide that does not detonate or deflagrate rapidly but is capable of undergoing a thermal explosion; iii. Type C – An organic peroxide that possesses explosive properties but will not detonate, deflagrate or thermally explode; and iv. Types D through F – Organic peroxides that have shown hazards such as partial detonation, etc., when tested in a laboratory but do not possess these hazards under normal conditions. 3. Potential Hazards a. Organic peroxides are strong oxidizing agents. b. Can be explosive in the presence of heat or metal salts. c. Can spontaneously explode in high concentrations or upon agitation (shaking or stirring). 4. Personal Protective Equipment a. Wear shatter resistant safety goggles. b. Wear a 100% cotton laboratory coat. c. Wear gloves when handling organic peroxides. Check compatibility with the specific chemical and the glove type you are using. Nitrile will often work, but it is not compatible with some organic peroxides. -
An Investigation Into the Synthesis and Characterisation of Metal
An Investigation into the Synthesis and Characterisation of Metal Borohydrides for Hydrogen Storage by Daniel Thomas Reed A thesis submitted to the University of Birmingham For the degree of Doctor of Philosophy School of Metallurgy and Materials College of Engineering and Physical Sciences University of Birmingham October 2009 University of Birmingham Research Archive e-theses repository This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder. SYNOPSIS With relatively high gravimetric and volumetric hydrogen storage capacities, borohydride compounds are being investigated for their potential use as hydrogen storage media. A study has been made into the mechanical milling of metal chlorides with sodium borohydride to try to form homoleptic borohydrides. Various characterisation techniques have been used to characterise the composition and microstructure of the samples, and to monitor in-situ the thermal decomposition processes. It was found that rather than homoleptic borohydrides (such as Zn(BH4)2 or Mg(BH4)2), complex borohydrides of the form AM2(BH4)5 and AM(BH4)3 (where A = Li or Na and M = Zn, Mg or Ca) tend to form. Mechanical milling of zinc chloride with sodium borohydride resulted in the formation of a covalent complex NaZn2(BH4)5.