| Name | CYANOPHOS |
| Synonyms | CYAP CYANOX CYANOPHOS BAY 34727 CYANOX(R) ai3-25675 4-(dimethoxyphosphinothioyloxy)benzonitrile (o-p-cyanophenyl-o,o-dimethylphosphorothioate) |
| CAS | 2636-26-2 |
| EINECS | 220-130-3 |
| Molecular Formula | C9H10NO3PS |
| Molar Mass | 243.22 |
| Density | 1.255-1.265 g/cm3(Temp: 25 °C) |
| Melting Point | 14-15° |
| Boling Point | bp0.09 119-120° (dec) |
| Flash Point | >100 °C |
| Water Solubility | 46 mg l-1 (30 °C) |
| Vapor Presure | 1.05 x 10-1 Pa (20 °C) |
| Refractive Index | nD32.5 1.5404 |
| Physical and Chemical Properties | Chemical properties The appearance is yellow transparent oily liquid. Pure product m.p.14 ~ 15 ℃, relative density 1.260(25 ℃), refractive index n25D1.5413. At 30 ℃, the solubility in water is 46mg/L, which is soluble in benzene, chloroform, acetone, methanol, ethanol, cyclohexanol and other organic solvents, and can be mixed with most pesticides. The stability to alkaline hydrolysis is twice that of methyl parathion, and it decomposes after 106min in 40% lye. |
| Use | Uses for the control of Chilo suppressalis, Chilo suppressalis, rice leaf roller, Rice bract, leaf cicada, thrips, cabbage and other pests |
| Risk Codes | R21/22 - Harmful in contact with skin and if swallowed. R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S36/37 - Wear suitable protective clothing and gloves. 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. |
| UN IDs | 3018 |
| Vapor pressure | 1.05 x 10-1 Pa (20 °C) |
| refractive index | nD32.5 1.5404 |
| flash point | >100 °C |
| storage conditions | 0-6°C |
| water solubility | 46 mg l-1 (30 °C) |
| morphology | liquid |
| Specific gravity | 1.255~1.265 |
| Merck | 13,2283 |
| BRN | 2695901 |
| EPA chemical information | Cyanophos (2636-26-2) |
Toxicity
acute oral LD50 was 610mg/kg (565mg/kg) for rats, 860mg/kg for rats, 800mg/kg for rats, 5mg/L (48h) for carp LC50, 6mg/L (LC50) for goldfish, 24h without death.
use
1. It is used to control Chilo suppressalis, Chilo suppressalis, leaf roller, rice bracts, rice leafhoppers, rice thrips, armyworms, aphids, yellow striped beetles, spider mites, etc., and can also control fruit trees, Vegetables and ornamental plants on the scale wing pests, flies, mosquitoes and other sanitary pests. Make poison bait and sprinkle it on the soil to prevent cutworms. Use 25~50g active ingredient/100kg water.
2. It is used to control lepidopteran pests on fruit trees, vegetables and ornamental plants, as well as sanitary pests such as cockroaches, flies and mosquitoes.
production method
1. It is obtained by the reaction of O,O-dimethylchlorosulfur phosphate ester and cyano phenol. The content of the original drug is about 93%, and each ton of product consumes 530kg of 4-cyanophenol, 620kg of anhydrous potassium carbonate, and 720kg of O,O-dimethyl sulfide phosphoryl chloride, of which 4-cyanophenol is prepared by reacting p-hydroxybenzoic acid with urea and phosphorus pentasulfide at 50-300 ℃.
2, O,O-dimethyl thiophosphoryl chloride synthesis see the preparation method of fenitrothion. In the presence of anhydrous potassium carbonate, O,O-dimethylthiophosphoryl chloride is prepared by reacting with p-hydroxy nitrile. P-hydroxybenzonitrile is prepared by the reaction of 4-hydroxybenzoic acid with urea and phosphorus pentasulfide.
category
Pesticides
toxicity classification
High toxicity
acute toxicity
oral-rat LD50: 215 mg/kg; oral-mouse LD50: 860 mg/kg
flammability hazard characteristics
Thermal decomposition of toxic phosphorus oxide, sulfur oxide, nitrogen oxide gas
storage and transportation features
The warehouse is ventilated and dry at low temperature; stored and transported separately from food raw materials
fire extinguishing agent
Sand, dry powder, foam
occupational standards
STEL 0.3 mg/m3
| WGK Germany | 3 |
| RTECS number | TF7600000 |
| HazardClass | 6.1( B ) |
| PackingGroup | III |
| customs code | 29269090 |
| toxic substance data | 2636-26-2(Hazardous Substances Data) |
| Toxicity | LD50 in mice (mg/kg): 1000 orally; 880 I .p. (Yamamoto) |