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Phosphorus trichloride

Chemical Properties Uses Preparation
Phosphorus trichloride
Phosphorus trichloride
Chemical Name:
Phosphorus trichloride
PICl;PCl3;Fosfortrichloride;Phosphortrichlorid;trichloro-phosphin;Trichlorophosphine;trojchlorekfosforu;phosphorouschloride;Trojchlorek fosforu;PHOSPHORUS CHLORIDE
Molecular Formula:
Formula Weight:
MOL File:

Phosphorus trichloride Properties

Melting point:
-112 °C
Boiling point:
74-78 °C(lit.)
1.574 g/mL at 25 °C
vapor density 
4.75 (vs air)
vapor pressure 
23.32 psi ( 55 °C)
refractive index 
n20/D 1.5148(lit.)
Flash point:
storage temp. 
Store at RT.
Soluble in benzene, carbon sulfide, ether, chloroform, carbon tetrachloride.
Water Solubility 
Moisture Sensitive
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
Phosphorous trichloride(7719-12-2)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
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
WGK Germany  2
RTECS  TH3675000
HazardClass  6.1
PackingGroup  I
Hazardous Substances Data 7719-12-2(Hazardous Substances Data)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H300 Fatal if swallowed Acute toxicity,oral Category 1, 2 Danger P264, P270, P301+P310, P321, P330,P405, P501
H301 Toxic if swalloed Acute toxicity,oral Category 3 Danger P264, P270, P301+P310, P321, P330,P405, P501
H314 Causes severe skin burns and eye damage Skin corrosion/irritation Category 1A, B, C Danger P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H318 Causes serious eye damage Serious eye damage/eye irritation Category 1 Danger P280, P305+P351+P338, P310
H330 Fatal if inhaled Acute toxicity,inhalation Category 1, 2 Danger P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501
H335 May cause respiratory irritation Specific target organ toxicity, single exposure;Respiratory tract irritation Category 3 Warning
H336 May cause drowsiness or dizziness Specific target organ toxicity,single exposure; Narcotic effects Category 3 Warning P261, P271, P304+P340, P312,P403+P233, P405, P501
H351 Suspected of causing cancer Carcinogenicity Category 2 Warning P201, P202, P281, P308+P313, P405,P501
H373 May cause damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 2 Warning P260, P314, P501
Precautionary statements:
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P284 Wear respiratory protection.
P310 Immediately call a POISON CENTER or doctor/physician.
P320 Specific treatment is urgent (see … on this label).
P301+P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.
P303+P361+P353 IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.
P304+P340 IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.
P405 Store locked up.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.

Phosphorus trichloride price More Price(15)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 157791 Phosphorus trichloride 99% 7719-12-2 1kg $122 2017-11-08 Buy
Sigma-Aldrich 157791 Phosphorus trichloride 99% 7719-12-2 1l $127.5 2017-11-08 Buy
Alfa Aesar 22988 Phosphorus(III) chloride, 99.997% (metals basis) 7719-12-2 25g $149 2017-11-08 Buy
Alfa Aesar 22988 Phosphorus(III) chloride, 99.997% (metals basis) 7719-12-2 100g $516 2017-11-08 Buy
Strem Chemicals 93-1588 Phosphorus(III) chloride (99.998%-P) PURATREM 7719-12-2 10g $70 2017-11-27 Buy

Phosphorus trichloride Chemical Properties,Uses,Production

Chemical Properties

A colorless or slightly yellow fuming liquid with a pungent and irritating odor resembling that of hydrochloric acid. Causes severe burns to skin, eyes and mucous membranes. Very toxic by inhalation, ingestion and skin absorption. Reacts with water to evolve hydrochloric acid, an irritating and corrosive gas apparent as white fumes.


Phosphorus trichloride is used to prepare phosphine and other phosphorus compounds; used during electrodeposition of metal on rubber and for making pesticides, surfactants, gasoline additives, plasticizers, dyestuffs, textile finishing agents, germicides, medicinal products, and other chemicals.


Phosphorus trichloride is prepared by reacting white phosphorus with dry chlorine present in limited quantity. Excess chlorine will yield phosphorus pentachloride, PCl5.
P4 + 6Cl2 → 4PCl3
P4 + 10Cl2 → 4PCl5
The compound is prepared in a retort attached to inlet tubes for dry chlorine and dry carbon dioxide and a distillation flask. White phosphorus is placed on sand in the retort. All air, moisture, and any phosphorus oxide vapors present in the apparatus are expelled by passing dry carbon dioxide.
Dry chlorine is then introduced into the apparatus. If a flame appears on phosphorus it indicates presence of excess chlorine. In that event, the rate of chlorine introduction should be decreased. For obtaining phosphorus trichloride, flame should appear at the end of the chlorine-entry tube. The trichloride formed is collected by condensation in the distillation flask. A soda lime tube is attached to the apparatus to prevent moisture entering the flask.
Phosphorus trichloride also can be prepared by reducing phosphorus oxychloride vapors with carbon at red heat:
POCl3 + C → PCl3 + CO


As of phosphorus oxychloride; manufacture of POCl3, PCl5; producing iridescent metallic deposits.

Reactivity Profile

Phosphorus trichloride is a strong reducing agent that may ignite combustible organic materials upon contact. May generate flammable and potentially explosive gaseous hydrogen upon contact with many common metals (except nickel and lead). Reactions with water are violent and produce heat and flashes of fire [AAR, 1999]. Gives intensely exothermic reactions with iodine monochloride [Mellor 2, Supp. 1:502. 1956]. Several laboratory explosions have been reported arising from mixtures with acetic acid, along with other acids, sulfuric acid and derivatives, carboxylic acids, etc. These have been ascribed to poor heat control allowing the formation of phosphine [J. Am. Chem. Soc. 60:488. 1938]. Ignites when mixed with hydroxylamine [Mellor 8:290. 1946-47]. Causes an explosion on contact with nitric acid [Comp. Rend. 28:86]. Phosphorus trichloride is incompatible with many common oxidants such as: sodium peroxide, fluorine, chromyl chloride, iodine chloride, to name a few. Isopropanol can react with PCl3, forming toxic HCl gas. (Logsdon, John E., Richard A. Loke., "Isopropyl Alcohol." Kirk-Othmer Encyclopedia of Chemical Technology. John Wiley & Sons, Inc. 1996.)

Health Hazard

Phosphorus trichloride is highly toxic; it may cause death or permanent injury. Contact is highly irritating to the skin, eyes, and mucous membranes, and the material is an irritant through oral and inhalation exposure.

Fire Hazard

Phosphorus trichloride will react violently with water, producing heat and toxic and corrosive fumes. When heated to decomposition, Phosphorus trichloride emits highly toxic fumes of chlorides and phosphorus oxides. Phosphorus trichloride may ignite other combustible materials. Reacts violently with water. Reacts explosively with acetic acid, aluminum, chromyl chloride, diallylphosphite and allyl alcohol, dimethyl sulfoxide, fluorine, hydroxylamine, iodine monochloride, lead dioxide, nitric acid, nitrous acid, organic matter, potassium, and sodium. Avoid contact with water, steam, or acids. Hazardous polymerization may not occur.

Phosphorus trichloride Preparation Products And Raw materials

Raw materials

Preparation Products

Phosphorus trichloride Suppliers

Global( 171)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Secco work (Beijing) chemical technology co., LTD 010-69755668;
010-69755668 China 3546 54
Chengdu HuaNa Chemicals Co., Ltd. 028-86612776 13699069380
- China 3879 55
Shandong Ono Chemical Co., Ltd. 0539-6362799(To 20)
0539-6362799(To 20) China 10083 58
Alfa Aesar 400-610-6006; 021-67582000
021-67582001/03/05 China 30309 84
Beijing dtftchem Technology Co., Ltd. 13651141086; 86(10)60275028、60275820
86 (10) 60270825 China 3434 62
JinYan Chemicals(ShangHai) Co.,Ltd. 13817811078,021-50426030
86-021-50426522,50426273 China 10089 60
Shanghai Science Bio-Pharmaceutical Co. Ltd. 021-57872719,13918702962/13482412995
021-57872719 QQ:1823739912 China 312 60
Shanghai GuangZan Chemical Technology Co., Ltd. 021-50426528 50426030
021-50426273 China 9 60
Chengdu XiYa Chemical Technology Co., Ltd. 4008-626-111
028-84752058 China 9741 57
China Langchem Inc. 0086-21-58956006,021-38701807;021-58950017
0086-21-58956100 China 7892 57

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