Phosphorus oxychloride is an important chemical raw material. It is a colorless and transparent fuming liquid. It is widely used in the production of pesticides, medicines, dyes, phosphate esters and flame retardants. It is used to manufacture organophosphorus pesticides, herbicides, insecticides, etc. The raw material is also used to produce plastic plasticizers, and can also be used for the chlorination of long-acting sulfa drugs, intermediates for the production of dyes, chlorinating agents and catalysts for organic synthesis, and extractants for uranium ore.
●2) Product attributes
Appearance and properties: colorless and transparent fuming liquid.
Odor: It has a special pungent odor.
pH value: It will decompose with water and show strong acidity.
Melting point/freezing point (℃): 1.2
Boiling point, initial boiling point and boiling range (℃): 105.1
Density: No data
Relative vapor density (air=1): 1.68
Relative density (water = 1): 1.68
Heat of combustion (KJ/mol): meaningless.
Saturated vapor pressure (kPa): 5.33(27.3℃)
Critical pressure (MPa): No data.
Critical temperature (℃): 286
Flash point (℃): meaningless
Log value of n-octanol/water partition coefficient: Not available.
Decomposition temperature (℃): Not available.
Ignition temperature (℃)): meaningless.
Upper explosion limit% (V/V): meaningless.
Lower explosion limit% (V/V): meaningless.
Odor threshold: No information.
Auto-ignition temperature (℃): meaningless.
●3) Safety instructions
• Yarong Technology has been committed to ensuring the health and safety of customers and employees. Avoid inhaling steam and mist. If direct contact with eyes or skin, rinse immediately with plenty of water and seek medical advice. If accidentally ingested, rinse immediately with water Mouth and seek medical advice. In any case, please wear suitable protective clothing and carefully refer to the product safety data sheet before using this product.
●4) Handling and transportation instructions
• When using glass bottles for packaging, the stoppers (caps) should be well sealed and put into corresponding iron drums or solid wooden boxes; when using iron drums, the drums should have screw caps, gaskets and other sealing parts, and they should be intact ; Tank truck packaging must be well sealed and comply with relevant regulations. Inspect each storage tank no less than 2 times a day, and make records. If you find hidden dangers such as running, leaking, dripping, and leaking, you should contact and deal with them in time, and report major hidden dangers in time. It should be stored separately from strong oxidants, strong bases, acids, water, alcohols, sodium, potassium, metal oxides, foods and food additives, and avoid mixed storage. Handling should be handled with care to prevent damage to packaging and containers. Pay attention to personal protection during sub-packaging and handling operations. Transportation follows the prescribed route. The storage area should be equipped with leakage emergency treatment equipment and suitable storage materials.
Properties
Summary
Phosphorus oxychloride (molecular formula: POCl3), also known as phosphoryl chloride, phosphorus oxychloride and phosphorus oxychloride, is an industrial chemical raw material and a colorless and transparent liquid. It has a pungent odor. Smoke violently in humid air. Relative density 1.67. Melting point: 1.25 ℃. Boiling point 105.1 ℃. It decomposes in water and ethanol to form phosphoric acid and hydrogen chloride. When a large amount of water is poured suddenly, a violent reaction can occur. POCl3 reacts with water and alcohol to form phosphoric acid or phosphate ester, such as o = PCl3 + 3H2O → o = P (OH) 3 + 3hcl. If alcohol replaces water in the reaction, the product is trialkyl phosphate. Such reactions are often carried out in pyridine or amine to absorb the generated HCl and promote the reaction. Under the catalysis of Lewis acid such as manganese chloride, POCl3 is co heated with excess phenol (aroh) to obtain triaryl phosphate. For example, when reacting with phenol: 3c6h5oh + o = PCl3 → o = P (oc6h5) 3 + 3hcl, phosphorus oxychloride is a Lewis base and will form adducts with many Lewis acids. For example, the adduct (POCl3 · AlCl3) formed by the reaction with titanium tetrachloride: cl3p + - O − + TiCl4 → cl3p + - O - − TiCl4 and aluminum chloride is very stable, so POCl3 is also used to remove AlCl3 from the product of Friedel Crafts reaction. In the presence of AlCl3, POCl3 reacts with hydrogen bromide to form pobr3. In industry, it is prepared by the reaction of phosphorus trichloride with oxygen or phosphorus pentoxide. It is mainly used to produce phosphate esters, such as trimethylbenzene phosphate.
Manufacturing
