Phosphorustrichloride , 2.0Msolutioninmethylenechloride,SpcSeal , 7719-12-2
Synonym(s):
Phosphorus(III) chloride
CAS NO.：7719-12-2
Empirical Formula: Cl3P
Molecular Weight: 137.33
MDL number: MFCD00011438
EINECS: 231-749-3
PRODUCT Properties
| Melting point: | -112 °C |
| Boiling point: | 74-78 °C(lit.) |
| Density | 1.574 g/mL at 25 °C |
| vapor density | 4.75 (vs air) |
| vapor pressure | 23.32 psi ( 55 °C) |
| refractive index | n |
| Flash point: | 76°C |
| storage temp. | Store at RT. |
| solubility | Soluble in benzene, carbon sulfide, ether, chloroform, carbon tetrachloride. |
| form | Liquid |
| Specific Gravity | approximate 1.6 |
| color | Yellow |
| Odor | Pungent, irritating odor |
| PH Range | 1 |
| Water Solubility | reacts |
| Sensitive | Moisture Sensitive |
| Merck | 14,7358 |
| BRN | 969177 |
| Exposure limits | TLV-TWA 1.12 mg/m3 (0.2 ppm) (ACGIH), 2.8 mg/m3 (0.5 ppm) (OSHA). |
| Dielectric constant | 3.7（18℃） |
| 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 and yields toxic gas. |
| CAS DataBase Reference | 7719-12-2(CAS DataBase Reference) |
| NIST Chemistry Reference | Phosphorus trichloride(7719-12-2) |
| EPA Substance Registry System | Phosphorus trichloride (7719-12-2) |
Description and Uses
Phosphorus trichloride, PCl3, is a clear, colorless, fuming, corrosive liquid. It decomposes rapidly in moist air and has a boiling point of about 168°F (75°C). PCl3 is corrosive to skin and tissue and reacts with water to form hydrochloric acid. The TLV is 0.2 ppm, and the IDLH is 50 ppm in air. The four-digit UN identification number is 1809. The NFPA 704 designation is health 4, flammability 0, and reactivity 2. The white section at the bottom of the diamond contains a W with a slash through it, indicating water reactivity. The primary uses are in the manufacture of organophosphate pesticides, gasoline additives, and dyestuffs; as a chlorinating agent; as a catalyst; and in textile finishing. Corrosives in contact with a poison may produce poison gases as the poison decomposes. In responding to an incident involving corrosives, the toxicity of the vapors could be much more of a concern for personnel than the corrosivity. When acids come in contact with cyanide, hydrogen cyanide gas, which is highly toxic, with a TLV of 10 ppm in air, is produced.
Phosphorus trichloride is an important intermediate in the production of insecticides, herbicides, and organophosphorus pesticides as well as other chemicals such as phosphoryl chloride, phosphorus pentachloride, thiophosphoryl chloride, and phosphonic acid. It is also used in the production of synthetic surfactants, phosphites, gasoline additives, flame retardants, silver polish, and producing iridescent metallic deposits.
Safety
| Symbol(GHS) |    GHS05,GHS06,GHS08 |
| Signal word | Danger |
| Hazard statements | H300+H330-H314-H373 |
| Precautionary statements | P260-P280-P303+P361+P353-P304+P340+P310-P305+P351+P338-P314 |
| Hazard Codes | T+,C |
| Risk Statements | 14-26/28-29-35-48/20-40-37 |
| Safety Statements | 26-36/37/39-45-7/8-43-28 |
| RIDADR | UN 3390 6.1/PG 1 |
| OEB | B |
| OEL | TWA: 0.2 ppm (1.5 mg/m3), STEL: 0.5 ppm (3 mg/m3) |
| WGK Germany | 2 |
| RTECS | TH3675000 |
| F | 21 |
| TSCA | Yes |
| HazardClass | 6.1 |
| PackingGroup | I |
| HS Code | 28121043 |
| Hazardous Substances Data | 7719-12-2(Hazardous Substances Data) |
| IDLA | 25 ppm |
