Name: Phosphorus trichloride
SKU: 7719-12-2

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Basic Information

Molecular Structure:
CAS No.:	7719-12-2
Name:	Phosphorus trichloride
Article Data:	296

Formula:	PCl₃
Molecular Weight:	137.333
Synonyms:	Phosphoruschloride (PCl₃) (8CI);Phosphine, trichloro-;Phosphorous chloride;Phosphoruschloride (Cl₆P₂);Trichlorophosphine;HSDB 1031;Trichlorophosphine;Fosfortrichloride;
EINECS:	231-749-3
Density:	1.574 g/cm³
Melting Point:	-93.6 °C (179.6 K)
Boiling Point:	76.1 °C (349.3 K)
Flash Point:	76°C
Solubility:	Soluble in benzene, ether, chloroform, halogenated organic solvents
Appearance:	colorless or slight yellow liquid
Hazard Symbols:	T+,C
Risk Codes:	14-26/28-29-35-48/20-40
Safety:	26-36/37/39-45-7/8-43-28
Transport Information:	UN 3390 6.1/PG 1
PSA:	13.59000
LogP:	2.92970

Raw Materials

60-29-7

333-20-0

Downstream Products

644-97-3

107-06-2

89-25-8

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- China (Mainland)(17)
- United States(1)
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Consensus Reports

EPA Extremely Hazardous Substances List. Reported in EPA TSCA Inventory.

Standards and Recommendations

OSHA PEL: TWA 0.2 ppm; STEL 0.5 ppm
ACGIH TLV: TWA 0.2 ppm; STEL 0.5 ppm
DFG MAK: 0.5 ppm (2.8 mg/m³)
DOT Classification: 8; Label: Corrosive, Poison

Analytical Methods

For occupational chemical analysis use NIOSH: Phosphorus Trichloride, 6402.

Specification

The Phosphorus trichloride with CAS registry number of 7719-12-2 is also known as Phosphine, trichloro-. The IUPAC name is Trichlorophosphane. It belongs to product categories of Inorganics; Inorganic Chemicals; Chlorination Micro/Nanoelectronics; C-X Bond Formation (Halogen); Electronic Chemicals; Others; Synthetic Reagents; Chlorination. Its EINECS registry number is 231-749-3. In addition, the formula is Cl₃P and the molecular weight is 137.33. This chemical is a colorless or slight yellow liquid and should be sealed in cool, ventilated and dry room.

Physical properties about Phosphorus trichloride are: (1)ACD/LogP: 3.84; (2)ACD/LogD (pH 5.5): 3.84; (3)ACD/LogD (pH 7.4): 3.84; (4)ACD/BCF (pH 5.5): 489.02; (5)ACD/BCF (pH 7.4): 489.02; (6) Polar Surface Area: 13.59Å²; (7)Enthalpy of Vaporization: 30.5 kJ/mol; (8)Boiling Point: 75.5 °C at 760 mmHg; (9)Vapour Pressure: 115 mmHg at 25 °C.

Preparation of Phosphorus trichloride: it is prepared industrially by the reaction of chlorine with a refluxing solution of white phosphorus.

P₄+6Cl₂→4PCl₃

Uses of Phosphorus trichloride: it is used to prepared tetra-N-ethyl-phosphorodiamidous acid chloride by reaction with diethylamine. This reaction occurs with solvent petroleum ether at the temperature of -75~25 °C and the yield is about 61%. It is also used for herbicide, insecticide, plasticiser, oil additive, and flame retardant.

Phosphorus trichloride is used to prepared tetra-N-ethyl-phosphorodiamidous acid chloride by reaction with diethylamine.

When you are using this chemical, please be cautious about it. It reacts violently with water and liberates toxic gas. It also may cause burns. As a chemical, it has danger of serious damage to health by prolonged exposure through inhalation. However, there is limited evidence of a carcinogenic effect. During using it, wear suitable protective clothing, gloves and eye/face protection. Keep container tightly closed and dry. After contact with skin, wash immediately. If contact with eyes accidently, rinse immediately with plenty of water and seek medical advice. In case of accident or if you feel unwell seek medical advice immediately.

You can still convert the following datas into molecular structure:
1. Canonical SMILES: P(Cl)(Cl)Cl
2. InChI: InChI=1S/Cl3P/c1-4(2)3
3. InChIKey: FAIAAWCVCHQXDN-UHFFFAOYSA-N

The toxicity data is as follows:

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
guinea pig	LC50	inhalation	50ppm/4H (50ppm)	SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE BEHAVIORAL: IRRITABILITY LUNGS, THORAX, OR RESPIRATION: DYSPNEA	American Industrial Hygiene Association Journal. Vol. 25, Pg. 470, 1964.
mammal (species unspecified)	LD50	oral	350mg/kg (350mg/kg)		Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 39(4), Pg. 86, 1974.
rabbit	LDLo	skin	1260mg/kg (1260mg/kg)	BEHAVIORAL: MUSCLE WEAKNESS LIVER: CHANGE IN GALL BLADDER STRUCTURE OR FUNCTION BLOOD: OTHER CHANGES	Acute Toxicity Data. Journal of the American College of Toxicology, Part B. Vol. 1, Pg. 71, 1990.
rat	LC50	inhalation	104ppm/4H (104ppm)	LUNGS, THORAX, OR RESPIRATION: STRUCTURAL OR FUNCTIONAL CHANGE IN TRACHEA OR BRONCHI LUNGS, THORAX, OR RESPIRATION: OTHER CHANGES BLOOD: HEMORRHAGE	American Industrial Hygiene Association Journal. Vol. 25, Pg. 470, 1964.
rat	LD50	oral	18mg/kg (18mg/kg)	BEHAVIORAL: FOOD INTAKE (ANIMAL) LUNGS, THORAX, OR RESPIRATION: CHRONIC PULMONARY EDEMA GASTROINTESTINAL: PERITONITIS	Acute Toxicity Data. Journal of the American College of Toxicology, Part B. Vol. 1, Pg. 71, 1990.