phosphorouschloride
Phosphorus trichloride
CAS: 7719-12-2
Molecular Formula: Cl3P
phosphorouschloride - Names and Identifiers
phosphorouschloride - Physico-chemical Properties
| Molecular Formula | Cl3P |
| Molar Mass | 137.33 |
| Density | 1.574g/mLat 25°C |
| Melting Point | -112 °C |
| Boling Point | 74-78°C(lit.) |
| Flash Point | 76°C |
| Water Solubility | reacts |
| Solubility | Soluble in benzene, carbon sulfide, ether, chloroform, carbon tetrachloride. |
| Vapor Presure | 23.32 psi ( 55 °C) |
| Vapor Density | 4.75 (vs air) |
| Appearance | Liquid |
| Specific Gravity | approximate 1.6 |
| Color | Yellow |
| Odor | Pungent, irritating odor |
| Exposure Limit | TLV-TWA 1.12 mg/m3 (0.2 ppm) (ACGIH), 2.8 mg/m3 (0.5 ppm) (OSHA). |
| Merck | 14,7358 |
| BRN | 969177 |
| Storage Condition | Store at RT. |
| Stability | Stable, but light sensitive. Incompatible with water, many metals, fluorine, acids, variety of organic materials including acids, alcohols and reducing agents. Reaction with water is violent |
| Sensitive | Moisture Sensitive |
| Refractive Index | n20/D 1.5148(lit.) |
| Physical and Chemical Properties | colorless and transparent fuming liquid, relative density of 1.574, melting point -112 ℃, boiling point of 75.5 ℃, soluble in ether, benzene, carbon disulfide and carbon tetrachloride, smoke in humid air, there is a strong stimulation, the occurrence of severe decomposition in water, the release of hydrogen chloride gas, toxic, corrosive. |
| Use | Mainly used in the manufacture of trichlorfon, methamidophos and acephate and rice blast and other organophosphorus pesticide raw materials. The pharmaceutical industry is used to produce sulfadiazine (S.D) and sulfadiazine (S.M.D). The dye industry is used as a condensation agent for color phenols. |
phosphorouschloride - Risk and Safety
| Risk Codes | R14 - Reacts violently with water R26/28 - Very toxic by inhalation and if swallowed. R29 - Contact with water liberates toxic gas R35 - Causes severe burns R48/20 - R40 - Limited evidence of a carcinogenic effect R37 - Irritating to the respiratory system |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S7/8 - S43 - In case of fire use ... (there follows the type of fire-fighting equipment to be used.) S28 - After contact with skin, wash immediately with plenty of soap-suds. |
| UN IDs | UN 3390 6.1/PG 1 |
| WGK Germany | 2 |
| RTECS | TH3675000 |
| FLUKA BRAND F CODES | 21 |
| TSCA | Yes |
| HS Code | 28121043 |
| Hazard Class | 6.1 |
| Packing Group | I |
phosphorouschloride - Nature
Open Data Verified Data
colorless clear fuming liquid. 51574, melting point -112 ℃, boiling point 76 ℃. Soluble in benzene, ether, chloroform, carbon tetrachloride. In humid air can be hydrolyzed into phosphorous acid and hydrogen chloride, the occurrence of white smoke. Water and ethanol decomposition reaction, contact with organic matter will fire, corrosive. Water decomposition, produce a lot of heat and smoke, and even explosion
Last Update：2024-01-02 23:10:35
phosphorouschloride - Preparation Method
Open Data Verified Data
with reagent grade phosphorus trichloride as raw material, under normal pressure, at 74~76 deg C distillation, remove the initial fraction and the final fraction, get the removal of arsenic, the purity of sulfur and other metal impurities was 99. 99% ~ 99. 999% high purity phosphorus chloride.
Last Update：2022-01-01 08:54:14
phosphorouschloride - Use
Open Data Verified Data
used as a raw material for semiconductor dopant and high purity phosphorus. In the whole process of circuit production, the quality of phosphorus trichloride plays an important role in controlling contamination and improving the yield of integrated circuits.
Last Update：2022-01-01 08:54:14
phosphorouschloride - Safety
Open Data Verified Data
toxic; Irritant and corrosive. Rat oral LDso:550mg/kg; Rat inhalation LCsa:104 x 10-6 4H. Has a strong stimulating effect on the eyes, respiratory tract mucosa, can make the conjunctiva inflammation, sore throat, have irritation to the lungs and mucous membranes, liquid or more concentrated gas can cause skin burns, can also cause serious eye damage, and even blindness. Operators should be fully protected. If accidentally touched the skin should be immediately washed with plenty of warm water and soap. It is not allowed to be stored and mixed with flammable items, deliquescent and other items. When loading and unloading should be careful to prevent the rupture of the packaging bottle. When there is a fire, dry sand and dry powder can be used to put out the fire, and water cannot be used. Keep away from fire and heat source.
Last Update：2022-01-01 08:54:15
phosphorouschloride - Reference Information
| pH range | 1 |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| inorganic salt | phosphorus trichloride is an important product frequently used in the inorganic salt industry in China, also known as "phosphorous chloride", for short, phosphorus chloride ". Molecular formula: pcl3. It is a colorless, transparent fuming liquid with irritating odor. If a trace amount of free yellow phosphorus is present, it is a cloudy yellow liquid. Toxic and corrosive, soluble in benzene, ether, chloroform, carbon disulfide, carbon tetrachloride, strong reaction with water, and the release of white smoke-like hydrogen chloride gas to stimulate corrosion. When the reaction will produce a spark, and even cause an explosion. Water or deliquescence can be decomposed into hydrochloric acid and phosphoric acid, and other metals other than nickel and lead have strong corrosion, so that metal deterioration, resulting in the formation of flammable hydrogen. With oxygen to generate phosphorus oxychloride, sulfur and sulfur to generate phosphorus chloride, steam stimulation of the mucosa caused by acid burns. phosphorus trichloride reacts with many organic compounds to produce phosphate esters, which are raw materials for the production of various organophosphorus pesticides and can be used to produce pesticides such as trichlorfon, phosphorus thiophosphate, phosphorus oxychloride, phosphorous acid, phosphite and other phosphides, it can also be used as chlorinating agent, semiconductor doping source, Catalyst in ether analysis and preparation of high purity phosphorus. Phosphorus trichloride is a strong corrosive substance, which has a strong stimulating effect on the eyes and respiratory tract. Superficial burns or ulceration of the mucous membrane of the middle diaphragm of the nose may occur. Liquid or concentrated vapor can cause skin burns, severe eye damage, and even blindness. Aerosol inhalation of 2% sodium bicarbonate solution or washing eyes with 2% boric acid water can prevent the damage of phosphorus trichloride to respiratory tract and eyes. The maximum allowable concentration in the air of the workshop is 0.5mg/m3. This product can be packaged in glass bottles, coated with iron barrels or wooden boxes. The package should be marked with "drug" and "corrosive substances. Should be stored in a dry, ventilated warehouse. Phosphorus trichloride should not be mixed with combustible materials and deliquescent articles, and should not be inverted, so as to prevent contact with water, and should be handled with light and handled when handling. Loading, unloading and handling are prohibited in rainy days. The method of fire protection can be dry sand, carbon dioxide, and water is prohibited. When contact with the skin, eyes should be washed with water, soap water and warm water, take the wrong time to take emetics. United Nations No. (UN No.)1809/8120, Class 8, are corrosion products. phosphorus trichloride can be obtained by passing dry chlorine gas into molten yellow phosphorus. The reaction formula is as follows: P4 +6Cl2 → 4 pcl3. |
| quenching method | under stirring, add to a large amount of ice water (can not be added back), confirm the reaction and then neutralize with alkali, for phosphorus oxychloride that does not react with ice water immediately, it can be slowly poured into water at room temperature to confirm that the reaction is finished, then it is added, ice cooling is added from time to time, and finally neutralization with alkali under cooling. During the treatment, it can only be slowly added to water (alkali solution), and water must not be added to the above compounds. |
| toxicity | see phosphorus trichloride. The phosphorus trichloride gas is toxic, irritating and corrosive. When in water, the reaction can cause explosion. Inhalation of phosphorus chloride gas can make the conjunctiva inflammation, sore throat and eye tissue damage, have a stimulating effect on the lungs and mucous membranes. This product is corrosive and easy to burn when in contact with the skin. Mild poisoning can be given to patients with soda vapor, drink plus milk mineral water, take expectorant and inducer, with 2% boric acid solution to rinse the eyes. Severe poisoning should be sent to the hospital for treatment. The maximum allowable concentration is 0.2 mg/m3. The equipment should be completely sealed. Operation and handling personnel should wear work clothes, masks, rubber gloves, rubber aprons, and long-length rubber shoes; Operation should be carried out on the head. If accidentally touched the skin should be immediately washed with plenty of warm water and soap. |
| Use | is used as a semiconductor dopant and as a raw material for preparing high-purity phosphorus. It is mainly used as a raw material for manufacturing trichlorfon, dichlorvos, methamidophos, acephate, phosphorus oxychloride, phosphorous acid, triphenyl phosphate and triphenyl phosphate. Pharmaceutical industry for the production of sulfadiazine (S.D) sulfamethoxine (s. N.D) and other drug intermediates. The dye industry is used as a comprehensive agent and catalyst. The annual output is 100000T. Our company can supply large quantities of arsenic, iron, lead, sulfate and other content of special mainly used for the manufacture of trichlorfon, dichlorvos, methamidophos, acephate, Rice blast and other organic phosphorus pesticide raw materials. It is also a raw material for the manufacture of triclosan, phosphorus oxychloride, phosphorous acid, triphenyl phosphate and triphenyl phosphate. Pharmaceutical industry for the production of sulfadiazine (S.D.), sulfadiazine (SMD) and other pharmaceutical intermediates. The dye industry is used as a condensation agent for the production of colored phenolic dyes. It is also used as a chlorinating agent and catalyst for the production of fragrances. phosphorus trichloride is an important raw material for the synthesis of various phosphorus-containing pesticide intermediates, such as phosphorus trichloride, phosphorus oxychloride, dialkyl phosphite, trialkyl phosphite, phosphorus oxychloride, etc., all of which are synthesized by phosphorus trichloride. In addition, it can also be synthesized by chloromethyl phosphate herbicide glyphosate, chloroethyl phosphoryl chloride synthesis of plant growth regulator ethephon; Also as a pharmaceutical intermediates, dye condensation agents and chlorinating agents and catalysts for the production of fragrances. mainly used in the manufacture of trichlorfon, methamidophos and acephate and rice blast and other organophosphorus pesticide raw materials. The pharmaceutical industry is used to produce sulfadiazine (S.D) and sulfadiazine (S.M.D). The dye industry is used as a condensation agent for color phenols. |
| production method | the production method is that the molten yellow phosphorus is subjected to a chlorination reaction with dry chlorine gas to generate phosphorus trichloride. During the reaction of P4 +6Cl2=4PCl3, a large amount of heat is generated. Usually, the molten yellow phosphorus is immersed in phosphorus trichloride, and then chlorine gas is introduced. In the reaction, it is also necessary to prevent the introduction of water and oxygen, so as to avoid the occurrence of side reactions to generate phosphorus oxychloride and hydrochloric acid. The yellow phosphorus is added into the interlayer molten phosphorus pan containing water by the chlorination method, and heated by steam to melt the yellow phosphorus into a liquid, which is fed into the reactor through the insulated conduit, and then the chlorine gas is dried and subjected to the chlorination reaction, phosphorus trichloride is generated, and the generated phosphorus trichloride vapor is fractionated and condensed by a bubble column, and a part of the vapor is fed back into the reactor to regulate the chlorination reaction; The other part is the finished phosphorus trichloride product. Its P4 +6C12 → 4PCI3 with reagent grade phosphorus trichloride as raw material, add to quartz distillation equipment, under normal pressure, at the distillation temperature of 74~76 ℃ for distillation, removing the initial fraction and the final fraction, arsenic, sulfur and other metals can be almost removed, and a high purity phosphorus trichloride product with a purity of about 99.99% to 99.999% is obtained. |
| category | corrosive article |
| toxicity grade | highly toxic |
| Acute toxicity | oral-rat LD50: 18 mg/kg |
| explosive hazard characteristics | water or acid is Fever or even explosion |
| flammability hazard characteristics | flammability; Toxic NOx and chloride fumes from combustion |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; With alkali, oxidant, organic matter, separate storage of combustible materials |
| fire extinguishing agent | dry sand, carbon dioxide; No water |
| Occupational Standard | TLV-TWA 0.5 PPM (3 mg/m3); sel 0.5 PPM |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-and health-threatening concentration | 25 ppm |
Last Update：2024-04-10 22:29:15
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