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Chemical Identification
Common Name
Vernolate
中文通用名
灭草敌
IUPAC
S-propyl dipropyl(thiocarbamate)
CAS
S-propyl dipropylcarbamothioate
CAS No.
1929-77-7
Molecular Formula
C10H21NOS
Molecular Structure
Physical Properties
Molecular weight:203.3g/mol; Physical form:Clear liquid, with slight aromatic odour; (tech is a clear yellow liquid). Density:0.952 g/ml (20℃); Composition:Tech. material is 95% pure. Flash point:121℃; Vapour pressure:1.39 Pa (25℃); Partition coefficient(n-octanol and water):logP = 3.84 (20℃); Solubility:In water 90 mg/l (20℃). Miscible with common organic solvents, e.g. xylene, methyl isobutyl ketone, kerosene, acetone, ethanol.; Stability:Stable in neutral media, and relatively stable in acidic and alkaline media; at pH7, 50% loss occurs in 13 d at 40℃. Stable up to 200℃. Decomposed by sunlight.
Toxicology
Oral Acute oral LD50 for male rats 1500, female rats 1550 mg/kg.Skin and eye Acute percutaneous LD50 for rabbits >5000 mg/kg. Non-irritating to eyes and skin (rabbits). Not a skin sensitiser (guinea pigs).Inhalation LC50(4 h) for rats
Environmental Profile

Ecotoxicology
Bees:Non-toxic to bees at 0.011 mg/bee.Birds:Dietary LC50 (7 d) for bobwhite quail 12000 mg/kg.Fish:LC50 (96 h) for rainbow trout 4.6, bluegill sunfish 8.4 mg/l.
Environmental fate:
Soil:In soil, microbial decomposition to mercaptan, amine, isopropanol and CO2 DT50 (27) 8-16 d; (4) >64 d.Plant:Readily metabolised by plants to CO2 and naturally-occurring plant constituents.

Transport Information
Hazard Class:II(Moderately hazardous)

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