Methamidophos
Methamidophos E.C.
CAS: 10265-92-6
Molecular Formula: C2H8NO2PS
Methamidophos - Names and Identifiers
| Name | Methamidophos E.C. |
| Synonyms | GIANT JIAANLIN bay71628 Methaphos bayer5546 BAY 71628 Bayer 5546 BAYER 71628 chevron9006 CEKUMIDOFOS Chevron 9006 Metamidophos Acephate-met Methamidophos Methamidophos E.C. Chevron ortho 9006 O,S-dimethyl phosphoramidothioate |
| CAS | 10265-92-6 |
| EINECS | 233-606-0 |
| InChI | InChI=1/C2H8NO2PS/c1-5-6(3,4)7-2/h1-2H3,(H2,3,4) |
Methamidophos - Physico-chemical Properties
| Molecular Formula | C2H8NO2PS |
| Molar Mass | 141.13 |
| Density | d44.5 1.31 |
| Melting Point | 44.5°C |
| Boling Point | 208.7±23.0 °C(Predicted) |
| Flash Point | 212°C |
| Water Solubility | >200 g l-1 (20°C) |
| Vapor Presure | 2.3×10-3Pa (25°C) |
| Appearance | solid |
| pKa | -0.58±0.70(Predicted) |
| Storage Condition | 0-6°C |
| Stability | Stable. Incompatible with strong oxidizing agents, copper, copper alloys. |
| Refractive Index | nD40 1.5092 |
| Physical and Chemical Properties | White needle-like crystals. The melting point was 44.5 °c and the vapor pressure was 0.4 (30 °c). Soluble in water, alcohol, soluble in chloroform, benzene, ether, toluene, xylene in the solubility of not more than 10%. In weak acid, weak base medium hydrolysis is not fast, in strong alkaline solution is easy to hydrolysis. Above 100 deg C, with the increase of temperature and accelerate the decomposition, above 150 deg C all decomposition. |
| Use | Organophosphorus insecticides for the control of aphids, dust, Rice planthopper, Rice thrips, armyworm, rice leaf roller, Rice bract and other pests |
Methamidophos - Risk and Safety
| Risk Codes | R24 - Toxic in contact with skin R26/28 - Very toxic by inhalation and if swallowed. R50 - Very Toxic to aquatic organisms R36 - Irritating to the eyes R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R11 - Highly Flammable |
| Safety Description | S1/2 - Keep locked up and out of the reach of children. S28 - After contact with skin, wash immediately with plenty of soap-suds. S36/37 - Wear suitable protective clothing and gloves. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| UN IDs | 2783 |
| RTECS | TB4970000 |
| Hazard Class | 6.1(a) |
| Packing Group | II |
| Toxicity | LD50 in adult male, female rats (mg/kg): 25, 27 orally (Gaines, Linder) |
Methamidophos - Upstream Downstream Industry
| Raw Materials | Ammonium hydroxide White phosphorus Methamidophos E.C. Toluene Methyl alcohol Sulfur(α) Dimethyl sulfate Octoxinol Phosphorus trichloride thiophosphoryl chloride Sodium hydroxide |
Methamidophos - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | methamidophos is a high-efficiency organophosphorus killer with a wide range of insecticides. it has good control effects on various pests that harm crops such as grain, cotton, fruit trees, such as aphids, rice planthopper, thrips, armyworm, rice leaf curl, rice bract, Spodoptera litura, etc., and has better control effects against resistant aphids and mites. Organophosphorus insecticides, used to control aphids, floats, rice planthoppers, rice thrips, armyworms, rice leaf roller, rice bracts and other pests Synthetic pesticides methamidophos and acephate Raw materials It is an organophosphorus insecticide with gastric toxicity, quick-acting contact killing and systemic absorption. It has a good control effect on various pests of crops such as grain, cotton, and fruit trees Methamidophos is a kind of high-efficiency organophosphorus Killer, the insecticidal range is wide, and it has good control effects on a variety of pests that harm crops such as grain, cotton, fruit trees, such as rice planthoppers, armyworms, rice leaf curls, rice bracts, Spodoptera litura, etc., and control resistance Aphids and mites have better efficacy. Calibration instruments and devices; evaluation methods; working standards; quality assurance/quality control; other. |
| production method | the main raw materials for methamidophos production are trichothion, methanol, liquid ammonia, dimethyl sulfate and triethylamine, which can be prepared by two processes: isomerization or dissimilation. According to GB 3724-83, methamidophos crude oil is a light yellow transparent liquid with active ingredient content ≥ 70.0%. Raw material consumption quota: 2400kg/t of thion trichloride, 2000kg/t of methanol, 1700kg/t of liquid alkali (converted into 100%), 500kg/t of ammonia water (converted into 100%) and 80kg/t of dimethyl sulfate. |
| category | pesticide |
| toxicity classification | highly toxic |
| acute toxicity | oral-rat LD50: 7.5 mg/kg; Oral-mouse LD50: 14 mg/kg |
| flammability hazard characteristics | open flame is combustible; heating emits toxic nitrogen oxide, sulfur oxide, and phosphorus oxide gases |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; separate from food raw materials storage and transportation |
| fire extinguishing agent | sand, dry powder, foam |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 21:01:54
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