Methylpirimiphos
Pirimiphos-methyl
CAS: 29232-93-7
Molecular Formula: C11H20N3O3PS
Methylpirimiphos - Names and Identifiers
Methylpirimiphos - Physico-chemical Properties
| Molecular Formula | C11H20N3O3PS |
| Molar Mass | 305.33 |
| Density | d30 1.157 |
| Melting Point | 15°C |
| Boling Point | 386.5±52.0 °C(Predicted) |
| Flash Point | -18°C |
| Water Solubility | 9.9 mg l-1 (30 °C, pH 5.2) |
| Vapor Presure | 1.5×10-2 Pa (30°C) |
| Appearance | Liquid |
| Merck | 13,7580 |
| BRN | 755726 |
| pKa | 3.71 |
| Storage Condition | APPROX 4°C |
| Refractive Index | nD25 1.527 |
| Physical and Chemical Properties | Melting Point: 15 |
| Use | Organophosphorus pesticides, can be widely used in storage, household health, crop and other pest control |
Methylpirimiphos - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R67 - Vapors may cause drowsiness and dizziness R65 - Harmful: May cause lung damage if swallowed R38 - Irritating to the skin R11 - Highly Flammable |
| Safety Description | S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S62 - If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. |
| UN IDs | UN3082 9/PG 3 |
| WGK Germany | 3 |
| RTECS | TF1410000 |
| Toxicity | 雌性大鼠急性经口LD50为2050mg/kg，雄小鼠为1180mg/kg，雄兔为1150～2300mg/kg，雌豚鼠为1000～2000mg/kg；兔急性经皮LD50>2000mg/kg。对皮肤和眼睛无刺激作用。 大鼠90d喂饲试验无作用剂量为8mg/kg饲料,相当于每天0.4mg/kg。动物试验未见致癌、致畸、致突变作用。三代繁殖试验未见异常。 鲤鱼LC50为1.6mg/L (24h)、1.4mg/L (48h)。 |
Methylpirimiphos - Upstream Downstream Industry
Methylpirimiphos - Reference Information
| toxicity | Acute oral LD50 of female rats is 2050mg/kg, male mice is 1180mg/kg, male rabbits were 1150 ~ 2300mg/kg, female guinea pigs were 1000 ~ 2000mg/kg; Rabbit acute percutaneous LD50>2000mg/kg. No irritation to the skin and eyes. Rats 90 days feeding Test No effect dose of 8 mg/kg feed, equivalent to 0.4mg/kg per day. No carcinogenic, teratogenic and mutagenic effects were found in animal experiments. The third generation reproductive test showed no abnormality. Carp LC50 1.6mg/L (24h), 1.4mg/L (48h). |
| Chemical properties | The original drug was yellow liquid, M.P. 15~17 ℃. The relative density of the pure product is 1.157 (30 ° C.), the refractive index n25D1.527, and the vapor pressure 1.333 × 10-2Pa (30 ° C.). Soluble in most organic solvents, solubility in water about 5mg/L. It is easy to hydrolyze in strong acid and alkaline medium, unstable to light, and the Half-Life in soil is about 3d. |
| Use | with wide insecticidal spectrum, rapid action and strong penetration, it has the effects of killing, stomach poisoning and fumigation. Mainly used for storage of pests and health pests. Such as at room temperature 30 degrees Celsius, relative humidity 50% conditions, the efficacy of up to 45~70 weeks. In Southeast Asia, 2% powder 200g per ton of grain is applied, which can keep free of insects for 6 months. The bag is sprayed with medicine, and the grain in the bag will not be attacked by Saw Valley steal, Rice elephant, Valley gall bladder, powder spot Borer, etc. within a few months; If the bag is treated by dipping method, the period of validity will be longer. Can be used as a high toxic organophosphorus pesticide alternative varieties. organophosphorus insecticides can be widely used for pest control in storage, household hygiene, crops, etc. Quick-acting, broad-spectrum insecticides and acaricides. For the stored-grain beetle, Weevil, moths and mites have good efficacy. It can also control warehouse pests, domestic and public health pests. |
| production method | preparation of diethylguanidine nitrate diethylamine was added in a molar ratio, about of the mother liquor was added, and then the mixture was cooled in a cold water bath, 65% concentrated nitric acid (nitric acid/diethylamine = 1.2 molar ratio) was added dropwise at 10~20 ℃, then 0.5mol of lime nitrogen was added, and the temperature was gradually raised to 70 ℃, then the reaction is maintained for 0.5~2h, then 0.5mol CO2 gas is introduced, and the ventilation time is about 0.5h, then the temperature is raised to 90 ℃ and the filter is filtered while hot, the filter cake is discarded, and the filtrate is cooled to precipitate needle-like crystals, it was filtered and dried, and the mother liquor was used for the next batch experiment. Preparation of 2-diethylamino-6-methyl-4-hydroxypyrimidine 0.1mol of diethylguanidine nitrate was added, and then 120ml of toluene was added, and stirring was started, after adding potassium carbonate according to the ratio, the mixture is heated to a slight reflux, and then ethyl acetoacetate is slowly added dropwise at a time of 1.5~2H. After dropping, reflux is completed and low boiling substance is distilled out, and the Reflux reaction is 0.5~2H, the temperature was lowered, 120ml of water was added, and the solution was adjusted to weakly acidic (about pH 6) with hydrochloric acid under sufficient stirring, and then the solvent toluene was removed (recovered and used) to obtain a pale yellow granular solid. Synthesis of methyl pyrimidine 0.10mol was added, then 70ml of ethyl acetate solvent was added, stirred, and then anhydrous K2CO3 was added according to the ratio, and refluxed for 1H, drop a certain ratio of methyl chloride, Dropwise temperature rise to reflux temperature, Reflux reaction 6~10h, temperature filtration, discard filter cake, the mother liquor is desolved (recycled and reused) to obtain yellow methyl pyrimidine crude oil. |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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Raw Materials for Methylpirimiphos