English 
搜索
Chemical Identification
Common Name
Parathion
中文通用名
对硫磷
IUPAC
O,O-diethyl O-4-nitrophenyl phosphorothioate
CAS
O,O-diethyl O-(4-nitrophenyl) phosphorothioate
CAS No.
56-38-2
Molecular Formula
C10H14NO5PS
Molecular Structure
Category
Activity
Insecticide, acaricide
Premix
Parathion-methyl+trichlorfon
Parathion-methyl+phoxim
Parathion+trichlorfon
Methamidophos+parathion-methyl
Endosulfan+parathion-methyl
Cyhalothrin+parathion-methyl+isocarbophos
Dusts, emulsion concentrates, granules, ULV liquid, wettable powders.
 Premix Parters: primisulfuron-methyl;
Physical Properties
Pale yellow liquid. Melting point 6.1°C. Hydrolyzes slowly at pH 7 or below. Specific gravity 1.26. Incompatible with alkaline materials. Readily soluble in dichloromethane, 2-propanol, toluene. Soluble in n-hexane.Molecular weight:291.3; Physical form:Pale yellow liquid, with a phenol-like odour. Density:1.2694; Composition:Tech. grade is 96-98%. Melting point:6.1 °C; Flash point:174 °C ( tech.); Vapour pressure:0.89 mPa (20 °C); Henry constant:0.0302 Pa m3 mol-1; Partition coefficient(n-octanol and water):logP = 3.83; Solubility:In water 11 mg/l (20 °C). Completely miscible with most organic solvents, e.g. dichloromethane >200, isopropanol, toluene, hexane 50-100 (all in g/l, 20 °C).; Stability:Hydrolysed very slowly in acidic media ( pH 1-6), more rapidly in alkaline media; DT50 (22 °C) 272 d ( pH 4), 260 d ( pH 7), 130 d ( pH 9). Isomerises on heating ab.
Toxicology
Oral:Acute oral LD50 for rats c. 2, mice c. 12, guinea pigs c. 10 mg/ kg. Percutaneous:Acute percutaneous LD50 for male rats 71, female rats 76 mg/kg. Not irritating to skin and eyes (rabbits). Not a skin sensitiser. Inhalation: LC50 (4 h) for male and female rats 0.03 mg/l (aerosol). Phytotoxicity:Non-phytotoxic, except to some ornamentals, cucurbits, sorghum, and some varieties of apple, pear, and tomato.
Environmental Profile
Ecotoxicology:
 Algae: ErC50 for Scenedesmus subspicatus 0.5 mg/l.Bees:Toxic to bees.Daphnia: LC50 (48 h) 0.0025 mg/l.Fish: LC50 (96 h) for rainbow trout 1.5, golden orfe 0.58 mg/l.Worms: LC50 for Eisenia foetida 267 mg/ kg dry soil. 

Environmental fate: 
Animals:In rats, following oral administration, 4-nitrophenol and paraoxon were the principal metabolites excreted (M. P. Carver, Pestic. Biochem. Physiol., 1990, 38, 254; L. G. Sultatos & C. L. Gagliardi, Biochem. Pharmacol., 1Soil:Based on Koc values and leaching studies, parathion can be classified as a compound with low mobility. In biologically-active soils, parathion is rapidly degraded under laboratory conditions as well as in the field. The degradaPlant:The major metabolites are paraoxon, diethylphosphate, 4-nitrophenol and photometabolites S-ethyl parathion and S-phenyl parathion. WATER SOLUBILITY: 12.4 mg/l at 25°C
Transport Information
Signal Word:DANGER; Hazard Class:Ib(Highly hazardous)

Porduct NewsMore

Colombia’s Constitutional Court bans chlorpyrifos

Chlorpyrifos

ADAMA Canada moves forward with lambda-cyhalothrin sales for 2023

Lambda-cyhalothrin

Copper formulations' market still underestimated: Chinese self-developed Thiazoles is tapping potential of global market

Copper fungicides

Mexico: Import of glyphosate drops from 16,500 tons to 8,200 tons

Glyphosate

Glyphosate to gain temporarily one year approval in EU without support of qualified majority of Member States

Glyphosate

Glyphosate prices drop 30% in Argentina

Glyphosate

One year extension of EU glyphosate approval failed to pass in the latest meeting

Glyphosate

Palmer amaranth in two southern U.S. states now resistant to S-metolachlor

S-metolachlor

FMC introduces Altacor EVO insect control, new management solution for lepidopteran pests

Chlorantraniliprole

Paraquat prices rise, pyridine base industry analysis

Paraquat

Related CompaniesMore