thiophosphoryl
thiophosphoryl - Names and Identifiers
thiophosphoryl - Physico-chemical Properties
| Molecular Formula | Cl3PS |
| Molar Mass | 169.4 |
| Density | 1.668 g/mL at 25 °C (lit.) |
| Melting Point | -35 °C (lit.) |
| Boling Point | 125 °C (lit.) |
| Water Solubility | hydrolyzes in H2O, forming H3PO4, HCl, H2S; hydrolyzes rapidly in alkaline solutions; soluble benzene, CCl4, CS2, chloroform [MER06] |
| Solubility | benzene: soluble(lit.) |
| Vapor Presure | 21.9hPa at 25℃ |
| Appearance | liquid |
| Specific Gravity | 1.668 |
| Color | colorless |
| Merck | 14,7356 |
| Sensitive | moisture sensitive |
| Refractive Index | n20/D 1.555(lit.) |
| Physical and Chemical Properties | Appearance of trichlorosulfon is a colorless transparent liquid, boiling point 125 ℃, specific gravity 1.685, solidified body -36.2~40.8 ℃, refractive index 1.635(25 ℃), short-term insoluble in cold water, slow decomposition in cold water, in hot water and alkali solution in the rapid decomposition, soluble in benzene, carbon tetrachloride, carbon disulfide, chloroform and other chloroform organic solvents. |
| Use | This product is an important intermediate for the manufacture of trimethoprim, parathion, trithion, methamidophos and other organophosphorus pesticides. |
thiophosphoryl - Nature
Open Data Verified Data
a colorless, transparent, fuming liquid. Relative density 1. 668, melting point -35 ℃. Boiling point of 125 ° C, soluble in benzene, carbon disulfide and carbon tetrachloride. In the case of cold water slow hydrolysis, hot water when the rapid reaction decomposition into hydrogen chloride, hydrogen sulfide and phosphoric acid. Volatile, smoke in the air, irritating odor and strong tear effect, great harm to the eyes and other mucous membranes.
Last Update：2025-06-10 22:55:16
thiophosphoryl - Preparation Method
Open Data Verified Data
synthesis method: the appropriate amount of catalyst is added to the reactor, and then molten sulfur heated to 1 40 °c is added to the reactor, and the reactor is heated to a liquid phase temperature of 140~160 °c, when the gas phase temperature is 12 5~13 0 ℃, according to the feed ratio (mass ratio) S:PCI3 = 1:4.3, an appropriate amount of phosphorus trichloride is added to the reactor to react to generate phosphorus trichloride, continuous distillation from the reactor, reflux condensation, separation, the preparation of phosphorus chloride.
Last Update：2022-01-01 11:02:40
thiophosphoryl - Application
Open Data Verified Data
It is mainly used as a raw material for the production of organophosphorus pesticides such as methyl parathion, dimethyl thiophosphoryl chloride, diethyl thiophosphoryl chloride and methamidophos, benthion, and low toxic organophosphorus pesticides, it is also used as a raw material for organic synthesis of phosphorus compounds.
Last Update：2025-08-19 16:24:40
thiophosphoryl - Safety
Open Data Verified Data
is a Class I inorganic acid corrosion articles, should be stored in a cool, ventilated, dry warehouse. It cannot be stored and mixed with flammable materials, oxidants, deliquescent articles and strong alkalis. Transport should be prevented from rain, because the product is decomposed when it meets water, and its gas is toxic. During loading and unloading, care should be taken to prevent package breakage. Packaged in dry glass bottles, each bottle with a net weight of 25kg, coated with an iron drum or a semi-cage wooden box. The package shall be marked with "drug" and "corrosive substance. Fire, dry sand, dry powder fire or carbon dioxide fire extinguishing, but not water. The volatile gas is toxic, irritating, corrosive, and irritating to the lungs, mucous membranes, and eyes. Leakage should be prevented, causing poisoning accidents. This product is more corrosive, such as accidentally touch the skin easy to burn, should immediately rinse with a lot of warm water clean. Production handling personnel should wear work clothes, wearing masks, rubber gloves, rubber aprons, and long rubber shoes; Operation should be carried out on the head.
Last Update：2025-06-10 22:55:16
thiophosphoryl - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| toxicity | the gas volatilized from thion trichloride is toxic, irritating and corrosive, and irritating to lungs, mucous membranes and eyes. Leakage should be prevented to cause poisoning accidents. This product is highly corrosive. If it touches the skin carelessly, it is easy to burn. It should be rinsed with a lot of warm water immediately. Production and handling personnel should wear work clothes, masks, rubber gloves, rubber aprons and long rubber shoes. The operation should be carried out in the limelight. |
| Use | Mainly used to produce methyl parathion, dimethyl thiophosphoric chloride, methamidophos, fenthion, and other pesticides and organophosphorus compounds It is mainly used as a raw material for the production of organophosphorus pesticides such as methyl parathion, dimethyl thiophosphoric chloride, diethyl thiophosphoric chloride, methamidophos, fenthion, and other high-efficiency and low-toxic organophosphorus pesticides, and is also used. Phosphorus trichloride is mainly used as a raw material widely used in the production of organophosphorus pesticides. It is used to synthesize important phosphorus-containing intermediates "chloride" and "dichloride", and then a large number of phosphorothioate pesticides (Such as parathion, phoxim, diazinon, chlorpyrifos, etc.) and thiophosphoramide pesticides (such as isocarbophos, methyl isoxaphos, amidophos, etc.); in addition, they are also used as organic synthesis Raw materials for phosphorus compounds. this product is an important intermediate for the manufacture of organophosphorus pesticides such as fenthion, parathion, fenthion, methamidophos, etc. This product is an important intermediate for the manufacture of organophosphorus pesticides such as fenthion, parathion, fenthion, and methamidophos. |
| Production method | The preparation method is prepared by heating phosphorus trichloride and sulfur in the presence of catalyst aluminum trichloride. That is, an appropriate amount of catalyst is added to the reactor first, and then the molten sulfur heated to 140°C is added to the reactor, and the reactor is heated to a liquid phase temperature of 140~160°C and a gas phase temperature of 125~130°C., Add phosphorus trichloride according to the mass ratio of sulfur: phosphorus trichloride of 1: 4.3, react to generate phosphorus trichloride, and then undergo reflux condensation and separation to obtain a finished product of phosphorus trichloride. In addition, phosphorus pentasulfide and phosphorus pentachloride can also be used to obtain phosphorus chloride. by synthesis method, an appropriate amount of catalyst is first added to the reactor, then molten sulfur heated to 140 ℃ is added to the human reactor, and the reactor is heated to a liquid phase temperature of 140~160 ℃ and a gas phase temperature of 125~130 ℃, an appropriate amount of phosphorus trichloride is added to the reactor according to the feeding ratio (mass ratio) S:PCI3 = 1:4.3, and the reaction is carried out to generate phosphorus trichloride, which is continuously distilled from the reactor, after reflux condensation and separation, phosphorus chloride is prepared. Its PCI3 S → PSC13 |
| category | corroded articles |
| toxicity classification | poisoning |
| acute toxicity | oral-rat LD50: 660 mg/kg; Oral-mouse LD50: 700 mg/kg |
| flammability hazard characteristics | water reaction and high heat decomposition of toxic sulfide and phosphide gas |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; Store separately from alkalis, oxidants and food additives |
| fire extinguishing agent | sand, carbon dioxide |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
