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Chemical Identification
Common Name
Dimepiperate
中文通用名
哌草丹
IUPAC
S-1-methyl-1-phenylethyl piperidine-1-carbothioate
CAS
S-(1-methyl-1-phenylethyl) 1-piperidinecarbothioate
CAS No.
61432-55-1
Molecular Formula
C15H21NOS
Molecular Structure
Category
Activity
Herbicide
Premix
Bensulfuron-methyl+dimepiperate
Physical Properties
Molecular weight:263.4. Physical form:Wax-like solid. Density:1.08 (25 °C); Melting point:38.8-39.3 °C; Vapour pressure:0.53 mPa (30 °C); Partition coefficient(n-octanol and water):logP = 4.02; Solubility:In water 20 mg/l (25 °C). In acetone 6.2, chloroform 5.8, cyclohexanone 4.9, ethanol 4.1, hexane 2.0 (all in kg/l, 25 °C). Stability:Stable >1 y (30 °C), and in light when dry. Aqueous solutions are stable at pH 1 and pH 14.
Toxicology
Oral:Acute oral LD50 for male rats 946, female rats 959, male mice 4677, female mice 4519 mg/kg. Percutaneous:Acute percutaneous LD50 for rats >5000 mg/kg. Non-irritating to eyes and skin (rabbits). Non-sensitising to skin (guinea pigs). Inhalation: LC50 (4 h) for rats >1.66 mg/l.
Environmental Profile
Ecotoxicology: 
Birds:Acute oral LD50 for male Japanese quail >2000, hens >5000 mg/kg. Daphnia: LC50 (3 h) 40 mg/l.Fish: LC50 (48 h) for carp 5.8, rainbow trout 5.7 mg/l. 
Environmental fate: 
Soil:Rapidly degraded in paddy fields, DT50 <7 d.Plant:Both absorption and translocation are greater in cockspur than in rice.
Transport Information
Hazard Class:III (Slightly hazardous).

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