Chemical Compatibility Classification

Chemical Compatibility Classification — The U.S. Coast Guard defines 43 cargo groups listed in Navigation and Vessel Inspection Circular No. 4-75, "Guide to Compatibility of Chemicals."... 

The Chemical Data Summary Sheet (CDSS) is a part of a larger INEEL Chemical Management System (ICMS) — a computerized tracking system for chemical products, chemicals, or hazardous agents (CPCHA). INEEL developed the CDSS as a tool to aid in hazard identification. Chemical safety experts evaluated every CPCHA at INEEL and developed a CDSS for each. Information on the CDSS includes the National Fire Protection Association (NFPA) diamond a listing of all hazards and a compatibility classification, time-sensitive classification, and building code classification for the identified CPCHA. While the CDSS is not a replacement for an MSDS, it does contain site-specific safety information that cannot be found in an MSDS and that information is presented in a standardized format... 

Safety Manual , AMCR 385-100 (April 1970), 11-1 to 11-34, 17-1 to 17-35, 18-1 to 18-13 19-1 to 19-36 (Storage and handling of chemical agents and munitions quantity-distance tables storage of expls ammo quantity-distance classification and storage compatibility)... 

Explosive chemicals tend to be governed by separate legislation, e.g., in the UK, The Classification and Labelling of Explosives Regulations 1983. These require the HSE to classify any explosive before it may be supplied. Under the scheme, explosives are labelled according to a classification based on hazard division (Table 12.7), and on compatibility (Table 12.8), which takes into account their sensitivity, explosivity and chemical nature. Labels are diamond shaped the top half is reserved for the pictograph and division number, the bottom half shows the hazard code and the classification number. Figure 12.1 shows the label for Class 1, Division 1.1, 1.2 or 1.3 explosive. 

Explosives, See also Explosive chemicals Transportation carriage, 447, 460, 594 compatibility groups, 456 hazard classification, 447, 455 Exposure limits. See Hygiene standards Eye protection, 435... 

An INTERNET compatible database for solvent extraction of metal ions (SEDATA), developed by H. Watarai et al., contains about 9,600 equilibrium constants, including distribution constants, extraction constants, and adduct formation constants, for more than 1,400 ligands and 82 metal ions.50 Raw data points of extraction curves are also incorporated to be reconstructed as a figure. However, SEDATA contains no fields for 2D chemical structures of extractants and allows one to perform a search using only eight fields (classification, metal, valence, reagent, solvent, title of the paper, author, and year). 

Previous sections have presented technical and historical information on radiation and chemical risk assessment and on classification of radioactive and hazardous chemical wastes. This information provides important perspectives for establishing the foundations of a new hazardous waste classification system. Before establishing these foundations, it is useful to specify the attributes that an ideal waste classification system should possess. The following sections identify the desirable attributes of a waste classification system including that the system should be risk-based, it should allow for exemption of waste, and it should be comprehensive, consistent, intrinsic, comprehensible, quantitative, compatible with existing systems, and flexible. These attributes should be recognized as goals that are not all likely to be fully realized in a practical waste classification system. 

An ideal system for classifying hazardous wastes should be risk-based, applicable to all wastes that contain radionuclides or hazardous chemicals, internally consistent, based on intrinsic waste properties, comprehensible, quantitative, and compatible with existing or feasible data and methods. To the extent that these attributes are lacking in a waste classification system, undesirable consequences are likely to result. 

Benzenoid (chemical) isomers are, in a strict sense, the benzenoid systems compatible with a formula C H, = (n s). The cardinality of C HS, viz. C HS = n, s is the number of isomers pertaining to the particular formula. The generation of benzenoid isomers (aufbau) is treated and some fundamental principles are formulated in this connection. Several propositions are proved for special classes of benzenoids defined in relation to the place of their formulas in the Dias periodic table (for benzenoid hydrocarbons). Constant-isomer series for benzenoids are treated in particular. They are represented by certain C HS formulas for which n s = In Sjl = n2 52 =. .., where (nk sk) pertains to the k times circumscribed C HS isomers. General formulations for the constant-isomer series are reported in two schemes referred to as the Harary-Harborth picture and the Balaban picture. It is demonstrated how the cardinality n s for a constant-isomer series can be split into two parts, and explicit mathematical formulas are given for one of these parts. Computational results are reported for many benzenoid isomers, especially for the constant-isomer series, both collected from literature and original supplements. Most of the new results account for the classifications according to the symmetry groups of the benzenoids and their A values (color excess). 

Chemicals to be transported must be packaged by the compatibility group and must comply with packaging and transportation requirements (LIR 405-10-01.0, Packaging and Transportation ). Containers that have explosives in them must comply with the requirements contained in the DOE Explosives Safety Manual and the packaging and transportation LIR. Federal DOT regulations in 49 CFR Parts 171-178 provide the guidance for transport, classification, and inspections of cylinders. 

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