nav Searchuser
Chemical Identification
Common Name
Pirimiphos-methyl
中文通用名
甲基嘧啶磷
IUPAC
O-2-diethylamino-6-methylpyrimidin-4-yl O,O-dimethyl phosphorothioate
CAS
O-[2-(diethylamino)-6-methyl-4-pyrimidinyl] O,O-dimethyl phosphorothioate
CAS No.
29232-93-7
Molecular Formula
C11H20N3O3PS
Molecular Structure
Physical Properties
Molecular weight:305.3; Physical form:Straw-coloured liquid. Density:1.17 (20 °C); 1.157 (30 °C); Composition:Tech. material is 88% pure. Melting point:15-18 °C ( tech.); Flash point:>46 °C; Vapour pressure:2 mPa (20 °C); 6.9 mPa (30 °C); 22 mPa (40 °C); Henry constant:6 × 10-2 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 4.2 (20 °C, unionised); pKa:4.30; Solubility:In water 11 ( pH 5), 10 ( pH 7), 9.7 ( pH 9) (all in mg/l, 20 °C). Miscible with most organic solvents, e.g. alcohols, ketones, halogenated hydrocarbons.; Stability:Hydrolysed by concentrated acids and alkalis; DT50 2-117 d ( pH range 4-9, most stable at pH 7). In sunlight, aqueous solution had DT50 <1 h.
Toxicology
Oral:Acute oral LD50 for rats 1414, mice 1180 mg/ kg. Percutaneous:Acute percutaneous LD50 for rats >2000 mg/kg. Slight eye and mild skin irritation (rabbits). Mild skin sensitiser (guinea pigs). Inhalation: LC50 (4 h) for rats >5.04 mg/l. ADI:( JMPR) 0.02 mg/ kg b.w. [1982].
Environmental Profile
Ecotoxicology: 
Algae: EC50 1.0 mg/l.Bees:Toxic to bees.Birds:Acute oral LD50 for bobwhite quail 40, Japanese quail 140, mallard ducks 1695 mg/ kg.Daphnia: EC50 (48 h) 0.21µg/l; (21 d) 0.08µg/l.Fish: LC50 (96 h) for rainbow trout 0.64 mg/l; (48 h) for mirror carp 1.4 mg/l.Worms: LC50 (14 d) 419 mg/ kg. 

Environmental fate: 
Animals:In mammals, the P-O bond is cleaved extensively and N-dealkylation and/or conjugation is a further step in the metabolism of the pyrimidine leaving group.Soil:Soil DT50 (aerobic and anaerobic) is typically 3.5-25 d.Plant:Rapidly evaporates. After 2-3 days, <10% remains on plants, including the degradation product O-2-ethylamino-6-methylpyrimidin-4-yl O,O-dimethyl phosphorothioate. WATER SOLUBILITY: Approx. 5 ppm at 30°C
Transport Information
Signal Word:WARNING; Hazard Class:II(Moderately hazardous)

Porduct NewsMore

Australia - Crown rot fight can now begin with Syngenta's Vibrance

Difenoconazole Metalaxyl-M Sedaxane

Swiss ban fungicide chlorothalonil

Chlorothalonil

Mississippi farm controls pigweedst with Enlist One® herbicide

2,4-D Choline

EU told not to 'punish' farmers as 'vital' substances set to expire

Benfluralin Dimoxystrobin Fluazinam Flutolanil Mancozeb Mecoprop-P Metiram Oxamyl Pyraclostrobin

Bayer reaches agreement to postpone more glyphosate lawsuits for settlement talks

Glyphosate

Ourofino recommends preventive action for coffee rust

Flutriafol

France bans sulfoxaflor products, citing risk to bees

Sulfoxaflor

Brazil: Rio Grande do Sul suspends application of 2,4-D until end of year

2,4-D

Gowan Company announces acquisition of fenamidone and pencycuron from Bayer

Fenamidone Pencycuron

Production process of Zhongshan Chemical’s pinoxaden intermediate passes provincial certification

Pinoxaden

Related CompaniesMore

Nanjing GoodAgro Co., Ltd.

Country:  China

Imidacloprid Pendimethalin Paraquat Pyrazosulfuron-ethyl+pretilachlor Pyraclostrobin+metiram Pirimiphos-methyl Lambda-cyhalothrin Glufosinate-ammonium Propanil Bispyribac-sodium Pyriproxyfen Trifluralin

Yifan Biotechnology Group Co., Ltd.

Country:  China

Fipronil Difenoconazole Metalaxyl Picoxystrobin Oxyfluorfen Clethodim Clodinafop-propargyl Metalaxyl-M Flumioxazin Prothioconazole

Shanghai Profirst Co., Ltd.

Country:  China

Copper hydroxide Brassinolide Azoxystrobin Brodifacoum Metaldehyde Prohexadione-calcium Adjuvant: Super-spreader Organosilicone PASS Adjuvant: Penetrant-Spreader Pro-MSO Plus Super Absorbent Polymer for Agriculture Pro-SAP Adjuvant: Water Conditioner Pro-Buffer L2

Hunan Haili Chemical Industry Co., Ltd.

Country:  China

Carbofuran Carbosulfan Propoxur Fenobucarb Isoprocarb Carbaryl Methomyl Dimethoate Pirimiphos-methyl Thiodicarb Thiophanate-methyl

Online Impex Limited

Country:  Bangladesh