Heptenophos

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Heptenophos

中文通用名

庚烯磷

IUPAC

7-chlorobicyclo[3.2.0]hepta-2,6-dien-6-yl dimethyl phosphate

CAS

7-chlorobicyclo[3.2.0]hepta-2,6-dien-6-yl dimethyl phosphate

CAS No.

23560-59-0

Molecular Formula

C₉H₁₂ClO₄P

Molecular Structure

General Product Information

Category

Insecticides > Organophosphorus insecticides
Acaricides / Miticides > Organophosphorus acaricides

Activity

Insecticide

Physical & Safety Data

Physical Properties

Molecular weight:250.6g/mol; Physical form:Light brown liquid, with odour typical of a phosphate ester. Density:1.28 (20℃); Composition:Tech. grade is >93% pure. Flash point:165 ℃ (Cleveland, open); 152℃ (Pensky-Martens, closed); Vapour pressure:65 mPa (15 ℃); 170 mPa (25℃); Henry constant:5.73 × 10-5 (20℃); 2.33 × 10-4 (25℃) (both in Pa m3 mol-1); Partition coefficient(n-octanol and water):logP = 2.32 ( OECD 117); Solubility:In water 2.2 g tech./l (20℃). Readily miscible with most organic solvents, e.g. in acetone, methanol, xylene >1, hexane 0.13 (all in kg/l, 25 ℃).Stability:Hydrolysed in acidic and alkaline media.

Toxicology

Oral:Acute oral LD₅₀ for rats 96-121, dogs 500-1000 mg/ kg b.w. daily. Percutaneous:Acute percutaneous LD₅₀ for rats >2000 mg/kg. Mild eye irritant. Inhalation: LC₅₀ (4 h) for rats 0.95 mg/l air. Phytotoxicity:Non-phytotoxic when used as directed, except to some varieties of apple, sweet cherry, and rose. ADI:( JMPR) 0.0001 mg/ kg b.w. ( PTDI) [1994].

Environmental Profile

Ecotoxicology:
Algae: EC₅₀ (72 h) 20 mg/l.Bees:Toxic to bees.Birds:Acute oral LD₅₀ for Japanese quail 17-55 mg/ kg (depending on carrier and sex) for pure a.i.Daphnia: LC₅₀ (48 h) 2.2 μg/l. Fish: LC₅₀ (96 h) for trout 0.056, carp 24 mg/l.Worms: LC₅₀ (14 d) for Eisenia foetida 98 mg/ kg dry, artificial soil.Other beneficial spp.:Harmless to Chrysopa larvae.

Environmental fate:
Animals:In rats, following oral administration, 90% is excreted in the urine and 6% in the faeces in metabolised form within 6 days.Soil:In soil, rapidly degraded by micro-organisms, DT₅₀ (field) 1.4 d, DT₉₀ (field) 4.6 d, depending on temperature and soil type; no accumulation. In lab. (aerobic), DT₅₀ <4 h Plant:Four days after application to lettuce, the compound is completely metabolised to polar, water-soluble compounds without accumulation of any intermediate.

Transport Information

Signal Word:WARNING; Hazard Class:Ib(Highly hazardous)