Name | Edifenphos |
Synonyms | sra7847 Blastoff bay78418 BAY 78418 Edifenphos bayer78418 BAYER 78418 Edifenphos 0.2 o-Ethyl S,S-diphenyl phosphorodithioate |
CAS | 17109-49-8 |
EINECS | 241-178-1 |
InChI | InChI=1/C14H15O2PS2/c1-2-16-17(15,18-13-9-5-3-6-10-13)19-14-11-7-4-8-12-14/h3-12H,2H2,1H3 |
Molecular Formula | C14H15O2PS2 |
Molar Mass | 310.37 |
Density | d420 1.23 |
Melting Point | 25°C |
Boling Point | bp0.01 154° |
Flash Point | 214°C |
Water Solubility | 56 mg l-1 (20 °C) |
Vapor Presure | 1.3 x 10-2Pa (20 °C) |
Appearance | liquid |
Merck | 13,3547 |
BRN | 1988797 |
Storage Condition | 0-6°C |
Refractive Index | nD22 1.61 |
Physical and Chemical Properties | Industrial products for yellow to light brown transparent liquid, with a bad smell. B. p.154 °c/1.33, relative density 1.23 (20 °c), refractive index n22d1.61. Soluble in methanol, ether, chloroform, acetone, benzene, xylene and other organic solvents, difficult to dissolve in water. 25 C when the half-life of 1.135H (pH = 7), 49H (pH = 9). Acidic conditions are more stable, in alkaline conditions, especially at higher temperatures, prone to hydrolysis or ester exchange reaction. |
Risk Codes | R21 - Harmful in contact with skin R23/25 - Toxic by inhalation and if swallowed. R43 - May cause sensitization by skin contact R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R24/25 - R23 - Toxic by inhalation |
Safety Description | 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.) 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 | UN 2810 |
WGK Germany | 3 |
RTECS | TE3850000 |
Hazard Class | 6.1(b) |
Packing Group | III |
Toxicity | LD50 in female, male rats (mg/kg): 25.5, 66.5 i.p. (Chen) |
NIST chemical information | Information provided by: webbook.nist.gov (external link) |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
toxicity | pure product has acute oral LD50312mg/kg to rats and 214 mg/kg to mice. Acute percutaneous LD501230mg/kg(4h) in rats; LD50 injected subcutaneously into mice was 163 mg/kg. It has no mutagenic effect on skin and eyes. There was no abnormality in the three-generation reproduction test and neurotoxicity test. Carp LC50:50% EC is 1.3mg/L (active ingredient);2% powder is 0.9mg active ingredient/l. Low toxicity to birds and bees. |
use | broad-spectrum organophosphorus fungicide has systemic effect, protective and therapeutic effect. It is mainly used to control rice blast and has good control effect on rice leaf blast, ear neck blast and seedling blast. For example, the control of leaf blast is sprayed with 40% emulsifiable concentrate 7.5~10.5mL/100m2 to water before the disease. When reissued, spray with 11.3~15mL/100m2 every 10~14 days; The same dose can prevent and control ear neck blast. Seed treatment can prevent and control seedling blast. In addition, it can also be used to control wheat scab, rice sclerotinia sclerotiorum, rice sheath blight, corn large spot and small spot, flax leaf spot, rice leafhopper, planthopper, rice borer, etc. This agent has obvious effect before pathogenic bacteria invade. This product is an organophosphorus fungicide, which is mainly used to control rice blast. It can also control rice flax leaf spot, rice micrere sclerotia, sheath blight, etc., and also has the effect of controlling rice planthoppers and leafhoppers. The oral LD50 of mice was 214mg/kg. It is mainly used to prevent and control rice blast, and can also treat rice flax leaf spot, rice small-grain sclerotium disease, sheath blight, etc. The phosphorus-flavored organic phosphorus fungicide is mainly used to prevent and control rice blast. It can also prevent rice flax leaf spot, rice small-grain sclerotium disease, sheath blight, etc., and also has the effect of preventing rice planthopper and leafhopper. The oral LD50 of mice was 214mg/kg. Calibration instruments and devices; evaluation methods; working standards; quality assurance/quality control; other. |
Production method | It is obtained by the reaction of thiophenol sodium salt and ethyl dichlorophosphate. Preparation of O-ethylphosphoryl dichloride Phosphorus oxychloride reacts with anhydrous ethanol, and the anhydrous ethanol is slightly excessive to produce O-ethylphosphoryl dichloride. Preparation of sodium thiophenol Benzene Chlorosulfonate is prepared to obtain benzenesulfonyl chloride, which is then converted into thiophenol in the presence of sulfuric acid and zinc powder (or iron powder), and neutralized to obtain the corresponding sodium phenol. Diphemp synthesizes O-ethylphosphoryl dichloride and sodium thiophenol to synthesize diphemp. |
category | pesticide |
toxicity classification | highly toxic |
acute toxicity | oral-rat LD50: 100 mg/kg; Oral-mouse LD50: 143 mg/kg |
flammability hazard characteristics | open flame is combustible; thermal decomposition of toxic phosphorus oxide, sulfur oxide, nitrogen oxide gas |
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) |