Agent Name

Chlorendic anhydride

CAS Number

115-27-5

Formula

C9-H2-Cl6-O3

Major Category

Plastics & Rubber

Synonyms

1,4,5,6,7,7-Hexachloro-endo-5-norbornene-2,3-dicarboxylic; anhydride; 1,4,5,6,7,7-Hexachloro-endo-bicyclo(2.2.1)hept-5-ene-2,3-dicarboxylic anhydride; 1,4,5,6,7,7-Hexachlorobicyclo(2.2.1)-5-heptene-2,3- dicarboxylic acid anhydride; 4,7-Methanoisobenzofuran-1,3-dione, 4,5,6,7,8,8-hexachloro-3a,4,7,7a-tetrahydro-; 5-Norbornene-2,3-dicarboxylic anhydride, 1,4,5,6,7,7-hexachloro-; Chloran 542; HET anhydride; Hexachloro-5-norbornene-2,3-dicarboxylic anhydride; Hexachloroendomethylene tetrahydrophthalic anhydride; [ChemIDplus]

Category

Acid Anhydrides, Cyclic

Description

White crystals; [Hawley]

Sources/Uses

Used as a hardener in epoxy resins and a flame retardant in polyester resins; Used in the production of chlorendic acid and polymers for coatings and building materials; [HSDB]

Comments

Occupational asthma reported in a mechanic due to welding fumes of a polyester paint containing chlorendic anhydride; [Malo] May cause skin sensitization after repeated or prolonged skin contact; [ICSC] See "ACID ANHYDRIDES."

Reference Link

INCHEM EHC: Chlorendic acid and anhydride - 1996

Exposure Assessment
Lethal Concentration

LC50 (rat) = >1,000 mg/m3;

Explanatory Notes

mp = 233 degrees C; [ChemIDplus]

Reference Link

Chlorendic anhydride allergy.

Adverse Effects
Skin Sensitizer

Yes

Asthma

Yes

Links to Other NLM Databases
Health Studies

Human Health Effects from Hazardous Substances Data Bank:

Toxicity Information

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Chemical Information

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Related Information in HazMap
Diseases

Occupational diseases associated with exposure to this agent:

Processes

Industrial Processes with risk of exposure: