Chlorendic anhydride

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 #1

Biomedical References

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

Explanatory Notes

mp = 233 degrees C; [ChemIDplus]

Reference Link #2

Yes

Yes

Diseases

Occupational diseases associated with exposure to this agent:

• Asthma, occupational
• Contact dermatitis, allergic

Processes

Industrial Processes with risk of exposure:

• Plastic Composites Manufacturing