Thiodiphosphoric acid tetraethyl ester
Sulfotep
CAS: 3689-24-5
Molecular Formula: C8H20O5P2S2
Thiodiphosphoric acid tetraethyl ester - Names and Identifiers
| Name | Sulfotep |
| Synonyms | THIOTEP Sulfotep SULFOTEP SULFOTEPP THIOTEPP(R) Sulfotep E.C.() plantfume103smokegenerator TETRAETHYLDITHIO PYROPHOSPHATE O,O,O,O-tetraethyl dithiodiphosphate Thiodiphosphoric acid tetraethyl ester Pyrophosphoric acid, tetraethyldithio- O,O,O',O'-TETRAETHYLDITHIOPYRO PHOSPHATE BIS-O,O-DIETHYLPHOSPHOROTHIONIC ANHYDRID |
| CAS | 3689-24-5 |
| EINECS | 222-995-2 |
| InChI | InChI=1/C8H20O6P2S/c1-5-11-15(9,12-6-2)14-16(10,13-7-3)17-8-4/h5-8H2,1-4H3 |
Thiodiphosphoric acid tetraethyl ester - Physico-chemical Properties
| Molecular Formula | C8H20O5P2S2 |
| Molar Mass | 322.31 |
| Density | 1.2175 g/cm3 (20℃) |
| Melting Point | <25℃ |
| Boling Point | bp2 136-139° |
| Flash Point | -18°C |
| Water Solubility | 30 mg/L at 20 °C (Worthing and Hance, 1991) |
| Solubility | Miscible with methyl chloride and most organic solvents (Worthing and Hance, 1991) |
| Vapor Presure | 1.7 x 10-4 at 20 °C (Windholz et al., 1983) |
| Appearance | Liquid |
| Color | Clear colorless |
| Exposure Limit | NIOSH REL: TWA 0.2 mg/m3, IDLH 10 mg/m3; ACGIH TLV: TWA0.2 mg/m3. |
| Merck | 13,9056 |
| BRN | 1714019 |
| Storage Condition | APPROX 4°C |
| Refractive Index | 1.5000 (589.3 nm 20℃ |
| Physical and Chemical Properties | Light yellow liquid. Boiling point 136-139 ℃(0.267kPa),110-113 ℃(27Pa), relative density 1.196(25/4 ℃), refractive index 1.4753(25 ℃), vapor pressure (20 ℃) 2.27 × 10-2Pa. It is miscible with most organic solvents and has a solubility of 670ppm in water. It is not easy to hydrolyze and is corrosive to iron. |
| Use | Is a non-systemic insecticide, mainly used for the control of rice, cotton pests |
Thiodiphosphoric acid tetraethyl ester - Risk and Safety
| Risk Codes | R27/28 - 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 | S23 - Do not breathe vapour. 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.) 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 | 1704 |
| WGK Germany | 3 |
| RTECS | XN4375000 |
| HS Code | 29209090 |
| Hazard Class | 6.1(a) |
| Packing Group | II |
| Toxicity | LD50 s.c. in mice: 8 mg/kg (Holmstedt) |
Thiodiphosphoric acid tetraethyl ester - Upstream Downstream Industry
| Raw Materials | Sodium carbonate o-Xylene Methamidophos E.C. Methyl alcohol Sulfuric acid Chlorine Octoxinol Trimethylamine Sodium hydroxide Phosphorus pentasulfide Phosphorus pentoxide Ethyl Alcohol |
Thiodiphosphoric acid tetraethyl ester - Reference Information
| Henry's Law Constant | 2.88 at 20 °C (approximate - calculated from water solubility and vapor pressure) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | this product is an organophosphorus insecticide, which is mainly used to control rice and cotton pests, such as rice borers, rice leafhoppers, planthoppers, cotton red spiders, cotton aphids, etc., and can also control rapeseed aphids, bean aphids, eggplant red spiders, weevils, millet borers, mesoculls, etc. It has a good killing effect on Oncomelania snails and leeches, and can also be used for greenhouse fumigation to kill insects and mites. It is a non-systemic insecticide, mainly used to control rice, cotton pests, etc. |
| Production method | It is prepared by hydrolysis and condensation of O,O-diethyl thiophosphoryl chloride in the presence of deacidification agent pyridine. |
| category | compressed gas and liquefied gas |
| toxicity classification | highly toxic |
| acute toxicity | oral-rat LD50: 5 mg/kg; Oral-mouse LD50: 22 mg/kg |
| flammability hazard characteristics | combustion products contain toxic sulfide and phosphide gas |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; separate from oxidant |
| fire extinguishing agent | water cooling fire cylinder |
| occupational standard | TWA 0.2 mg/m3; STEL 0.6 mg/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-threatening and health concentration | 10 mg/m3 |
Last Update：2024-04-09 02:00:08
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