TCPA

Tetrachlorphthalic Anhydride and Tetrachlorphthalic Acid. Tetrachlorphthalic anhydride [117-08-8] (TCPA) is manufactured by the ferric chloride catalyzed chlorination of phthalic anhydride. The relatively low chlorine content and the lower flame retardant efficiency of the aromatic chlorides limit use to unsaturated polyester resin formulations that do not requite a high degree of flame retardancy. 

TCPA.C Nomenclature of Inorganic Chemist, 2nd ed., Butterworths, London, 1971. 

The New Jersey Department of Environmental Protection uses the TXDS method of consequence analysis to estimate potentially catastrophic quantities of toxic substances, as required by the New Jersey Toxic Catastrophe Prevention Act (TCPA). An acute toxic concentration (ATC) is defined as the concentration of a gas or vapor of a toxic substance that will result in acute health effects in the affected population and 1 fatality out of 20 or less (5% or more) during a 1-hr exposure. ATC values, as proposed by the New Jersey Department of Environmental Protection, are estimated for 103 extraordinarily hazardous substances and are based on the lowest value of one of the following (1) the lowest reported lethal concentration (LCLO) value for animal test data, (2) the median lethal concentration (LC50) value from animal test data multiplied by 0.1, or (3) the IDLH value. 

The EPA RMP regulation and the European Community s Seveso II directive both exempt covered processes from some regulatory provisions, if the facility documents the absence of catastrophic damage from process accidents under reasonable worst case conditions. The State of New Jersey is also considering similar action in its proposed revisions of the Toxic Catastrophe Prevention Act (TCPA) regulations. 

State of New Jersey is also considering similar action in its proposed revisions of the Toxic Catastrophe Prevention Act (TCPA) regulations. 

OSHA relied on several established lists-including the New Jersey Toxic Catastrophe Prevention Act (TCPA), the Delaware Extremely Hazardous Substances Risk Management Act, the European Communities Seveso Directive (82/501/EEC), and NFPA Hazardous Chemicals Data (NFPA 49)-to develop its list of highly hazardous chemicals. OSHA chose to list the chemicals classified as reactive category 3 or 4 in NFPA 49 (1975 edition). 

Two states have successfully implemented or are considering a list-based approach to address coverage of reactive hazards that affect the public. Delaware uses the same overpressurization criterion as OSHA for determining the quantity of a listed substance that is covered New Jersey is expected to include the criterion in its revision of the Toxic Catastrophe Prevention Act (TCPA). 

The New Jersey Department of Environmental Protection and Energy is presently considering amendment of its TCPA to establish coverage of reactive hazards that might affect the public. The State has asked for stakeholder input on the following proposition (paraphrased) ... 

Processes having a reactive hazard with a heat of reaction of 100 calories per gram will be regulated under the NJ TCPA when the quantity of reactive hazard contained in the process equals or exceeds the threshold quantity calculated to result in a 2.3 psi overpressure wave endpoint at a distance of 100 meters or a lesser distance to the source boundary. 

Synonyms AI3-015101 BRN 0744602 CCRIS 3742 Desmodur T80 2,4-Diisocyanato-l-methylbenzene Diisocyanatoluene 2,4-Diisocyanotoluene Hylene T Hylene TCPA Hylene TLC Hylene TM Hylene TM-65 Hylene TRF Isocyanic acid, methylphenylene ester Isocyanic acid, 4-methyl-/ 3-phenylene ester 4-Methylphenylene diisocyanate 4-Methylphenylene isocyanate Mondur TD Mondur TD-80 Mondur TDS Nacconate 100 NCI-C50533 Niax TDI Niax TDI-P NSC 4791 NSC 56759 RCRA waste number U223 Rubinate TDI 80/20 TDI 2,4-TDI TDI-80 Toluene 2,4-diisocyanate Tolyene-2,4-diisocyanate Tolylene-2,4-diisocyanate 2,4-Tolylene diiso-cyanate /n-Tolylene diisocyanate UN 2078. 

TCNB = tetracyanobenzene, TCPA = tetrachlorophtha1ic anhydride, DCNQ. = d i ch 1 orod i cyanoqu i none, HMB = hexamethyl benzene,... 

Phimister, J. et al., Near-Miss Incident Management in the Chemical Process Industry, Risk Analysis, Vol. 23, No. 3,2003 Toxic Catastrophe Prevention Act (TCPA) N.J.S.A. I3 IK-I9 et seq. 

Thus, irradiation of XVIII in the presence of chloranil or tetra-chlorophthalIic anhydride (TCPA) in acetonitrile under dry, oxygen-free conditions yielded rapid precipitation of crossiinked polymer. The irradiation of XIX in the presence of N,N-dimethyI-aniline in dimethyIformamide under exclusion of air and moisture produced a very slight indication of crosslinking occurring. 

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