Heptenophos

Synonyms

5-(O,O-Dimethylphosphoryl)-6-chlorobicyclo(3.2.0)hepta-1,5-dien; 7-Chlorobicyclo(3.2.0)hepta-2,6-dien-6-yl dimethyl phosphate; HOE 2982 OJ; Heptenophos; Hostaquick; Hostavik [Russian]; O,O-Dimethyl-O-(6-chlorobicyclo(3.2.0)heptadiene-1,5-yl)phosphate; Phosphonic acid, 7-chlorobicyclo(3.2.0)hepta-2,6-dien-6-yl dimethyl ester; Ragadan; XOE 2982 [Russian]; [ChemIDplus] UN3018

Category

Organophosphate Insecticides

Description

Pale amber liquid; [Merck Index] Brown liquid; [MSDSonline]

Sources/Uses

Used as systemic and contact insecticide (agriculture, horticulture, and ornamentals) and veterinary ectoparasiticide; [HSDB]

Comments

May cause irritation; A cholinesterase inhibitor; [MSDSonline] “The average of two baseline respective cholinesterase activity determinations three days apart, with no exposures to enzyme inhibiting pesticides for at least 30 days, is recommended for each worker prior to exposure to cholinesterase inhibitors because of large inter-individual differences in published baseline values. To be established at least once a year. Removal from workplace exposures is recommended until the cholinesterase activity returns to within 20% of baseline.” [TLVs and BEIs]

No longer registered as a pesticide for use in the US; [HSDB]

Biomedical References

Acetylcholinesterase activity in red blood cells = 70% of individual's baseline; Butylcholinesterase activity in serum or plasma = 60% of individual's baseline; Sample at end of shift; [TLVs and BEIs]

0.00075 mm Hg

LC50 (rat) = 400 mg/m3/4h

Explanatory Notes

The Guide in the Emergency Response Guidebook is for "Organophosphorus pesticide, liquid, toxic."

Other Poison

Organophosphate

Diseases

Occupational diseases associated with exposure to this agent:

• Organophosphates & carbamates, acute poisoning

Processes

Industrial Processes with risk of exposure:

• Farming (Pesticides)