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Phosphorus oxychloride

Chemical Characteristics Usage Toxicology Warnings and Precautions Hazards & Safety Information
Phosphorus oxychloride
Phosphorus oxychloride structure
Chemical Name:
Phosphorus oxychloride
OPCl3;POCl3;oxychloride;Fosforoxychlorid;Phosphorylchlorid;fosforoxychloride;PHOSPHOROXYCHLORIDE;PHOSPHORYL CHLORIDE;Phosphoroxidchlorid;Phosphorus oxychlori
Molecular Formula:
Formula Weight:
MOL File:

Phosphorus oxychloride Properties

Melting point:
1.25 °C(lit.)
Boiling point:
107 °C
1.645 g/mL at 25 °C(lit.)
vapor density 
5.3 (vs air)
vapor pressure 
104 mm Hg ( 50 °C)
refractive index 
n20/D 1.461
Flash point:
storage temp. 
Store below +30°C.
Phosphorus(V) oxychloride is soluble in many organic solvents.
Specific Gravity
1.692 (15/15℃)
1.0 (5g/l, H2O, 25℃)
Water Solubility 
reacts exothermically
Moisture Sensitive
Exposure limits
TLV-TWA0.628 mg/m3 (0.1 ppm)(ACGIH).
Stable. Reacts violently with water. Incompatible with many metals, alcohols, amines, phenol, DMSO, strong bases.
CAS DataBase Reference
10025-87-3(CAS DataBase Reference)
NIST Chemistry Reference
Phosphoryl chloride(10025-87-3)
EPA Substance Registry System
Phosphoric trichloride(10025-87-3)
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
  • NFPA
Hazard Codes  T+,C
Risk Statements  14-22-26-29-35-48/23-25
Safety Statements  26-45-7/8-36/37/39
RIDADR  UN 1810 8/PG 2
WGK Germany  1
RTECS  TH4897000
HazardClass  8
PackingGroup  II
HS Code  28121020
Hazardous Substances Data 10025-87-3(Hazardous Substances Data)
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H302 Harmful if swallowed Acute toxicity,oral Category 4 Warning P264, P270, P301+P312, P330, 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
H330 Fatal if inhaled Acute toxicity,inhalation Category 1, 2 Danger P260, P271, P284, P304+P340, P310,P320, P403+P233, P405, P501
H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure Category 1 Danger P260, P264, P270, P314, P501
Precautionary statements:
P260 Do not breathe dust/fume/gas/mist/vapours/spray.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P320 Specific treatment is urgent (see … on this label).
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.

NFPA 704

Diamond Hazard Value Description
3 2
HEALTH   3 Short exposure could cause serious temporary or moderate residual injury (e.g. liquid hydrogen, sulfuric acid, calcium hypochlorite, hexafluorosilicic acid)
FIRE  0 Materials that will not burn under typical fire conditions, including intrinsically noncombustible materials such as concrete, stone, and sand. Materials that will not burn in air when exposed to a temperature of 820 °C (1,500 °F) for a period of 5 minutes.(e.g. Carbon tetrachloride)
REACT   2 Undergoes violent chemical change at elevated temperatures and pressures, reacts violently with water, or may form explosive mixtures with water (e.g. white phosphorus, potassium, sodium)

(NFPA, 2010)

Phosphorus oxychloride price More Price(15)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 201170 Phosphorus(V) oxychloride 99% 10025-87-3 5g $34.8 2018-11-20 Buy
Sigma-Aldrich 201170 Phosphorus(V) oxychloride 99% 10025-87-3 1kg $99.8 2018-11-20 Buy
Alfa Aesar 010525 Phosphorus(V) oxychloride, 99% 10025-87-3 1kg $92.5 2018-11-16 Buy
Alfa Aesar 010525 Phosphorus(V) oxychloride, 99% 10025-87-3 250g $35.8 2018-11-16 Buy
Strem Chemicals 93-1543 Phosphorus oxychloride, 98+% 10025-87-3 250g $53 2018-11-13 Buy

Phosphorus oxychloride Chemical Properties,Uses,Production

Chemical Characteristics

Phosphorus oxychloride (chemical formula: POCl3), is a type of industrial raw material. It is a colorless and transparent liquid, and it has an unpleasant irritating odor. It will smoke intensely in humid air. Its relative density is 1.68, melting point is 1.25℃, boiling point is 105.1℃. It breaks down into phosphoric acid and hydrogen chloride in water and ethanol. When suddenly combined with a large amount of water, an intense reaction may occur. POCl3 reacts with water and alcohol to create phosphoric acid or phosphate. If alcohol replaces the water in the reaction, the end product will be trialkyl phosphate. This type of reaction often occurs in pyridine or ammonia, as it absorbs the produced HCl to stimulate the reaction. When catalyzed by a Lewis acid such as manganese chloride, POCl3 and a large amount of phenol (ArOH) heats to produce triaryl phosphate, such as in the reaction below: 3 C6H5OH + O=PCl3 → O=P(OC6H5)3 + 3 HCl. Phosphorus oxychloride is a Lewis base, and it produces compounds with many Lewis acids, such as in its reaction with titanium tetrachloride: Cl3P5+O− + TiCl4 → Cl3P5+O-−TiCl4. Its adduct with aluminum chloride (POCl3•AlCl3) is very stable, and thus POCl3 is used to remove the AlCl3 in the end products of Friedel-Crafts reactions. In the presence of AlCl3, POCl3 reacts with hydrogen bromide to create POBr3.


Phosphorus oxychloride can be used as a semiconductor dopant, and it is a raw material for light-conducting fibers. It is widely used in pesticides, pharmaceuticals, dyes, phosphates and flame retardant production. It is a raw material for producing organic phosphorus herbicide and chlordimeform, and it is a plasticizer in plastic production. Phosphorus oxychloride is also used in the chlorination of long-acting sulfa drugs, is an intermediate in dye production and a catalyst in organic synthesis of chlorinating agents, and it is an extracting agent in uranium mining. It is also used in producing pharmaceuticals.


Toxicity is similar to phosphorus trichloride, phosphorus pentachloride and phosgene. Large mice, oral, LD50: 380 mg/kg; inhaled, LC50: 32 ppm/4H. Acute poisoning in small mice results in restlessness, upper respiratory tract and conjunctival irritation, depression, convulsions, unsteady walking, lying on the side, and eventually, death. For large mice, in addition to the symptoms above, also exhibited tearing, cornea clouding, and pulmonary edema. Subacute and chronic toxicity: large mice, inhaled for 60 days at a concentration of 33.5mg/m3, exhibited slowed weight gain, skin ulcers, decreases survival rates in lung macrophages, no liver and kidney functions, and organ characteristic changes.
This product has a strong oxidizing and liposoluble effects; besides burning the digestive tract, it can also cause acute necrosis and autolysis in the liver when absorbed through the digestive tracts. Additionally, besides burning the skin, when completely absorbed through the skin, 3% can cause death in animals. When phosphorus oxychloride is inhaled and comes in contact with the moist respiratory tract mucosa, it will break down into phosphoric acid and hydrogen chloride, and it will irritate and corrode the mucosa. When humans contact at a concentration of 70mg/m3, they will usually exhibit symptoms after a 2-6h latency period, including respiratory tract mucosa irritation and eye pain. Serious cases include a choking sensation, cyanosis, pulmonary edema, heart failure, anemia, liver damage, and proteinuria. When the temperature in the car is high and the humidity is relatively low, there is a high risk of inhalation and poisoning.
The highest permitted concentration is 0.05 mg/m3. Handlers should wear protective equipment, and production equipment must be tightly sealed. Processors can also wear filtering gas masks. Take care to protect skin and eyes.
After inhalation, emergency response and treatment is similar to chlorine, hydrogen chloride and other irritating gases. If contacted with skin, first use paper or cotton to absorb the liquid, then rinse with water for at least 15 minutes; if directly rinsed with water, it may produce phosphoric acid and continue to burn the skin. Treat injury as an acid burn.
Danger regulations GB8.1 type 81040. Iron regulation: Level one inorganic acidic corrosive product, 91022. UN No. 1810. IMDG CODE page 8197, type 8.

Warnings and Precautions

Phosphorus oxychloride is often used in industrial production; there are many details to take note of when using phosphorus oxychloride to prevent safety concerns and accidents:
1. Phosphorus oxychloride preparation: As many factories use water jet vacuums to store phosphorus oxychloride, great attention must be paid to the switch order to prevent accidents. The buffer vacuum tank must be frequently inspected to prevent the water from being sucked into storage containers and causing accidents.
2. Phosphorus oxychloride with hydrogen chloride: take care to not add an excess of phosphorus chloride. If there is an excess, slowly drop in water to hydrolyze the phosphorus chloride, and then remove the produced phosphoric acid.
3. Slowly place any materials containing phosphorus oxychloride into a hydrolysis kettle containing cold water and mix continuously. Avoid adding water to the material.
4. Whenever using systems containing phosphorus oxychloride, take care to measure the water content in all the components to prevent an excess of water from causing an explosion.
5. Frequently inspect reactors for cracks and imperfections to prevent water from leaking in and coming in contact with the phosphorus oxychloride.
6. When adding phosphorus oxychloride to a reactor, remain observant and stop adding material immediately if there are any abnormal occurrences. Only continue adding material after investigating the cause of these occurrences.
7. Phosphorus oxychloride reacts slowly with water when at a lower temperature. Thus, drop in slowly to prevent sudden intense reactions.
8. Phosphorus oxychloride can be used in combination with dichloroethane and toluene solutions, but not with alcohol and ammonia solutions.

Hazards & Safety Information

Category Corrosive items
Toxicity grading highly toxic
Acute Toxicity Oral-Rat LD50: 380 mg/kg
Flammability and Hazardous characteristics being explosive upon coming across water with release of toxic chloride, phosphorus oxide gas
Storage and transportation characteristics Ventilated, low temperature and dry; and store it separately from alkali
Fire Extinguishing agent dry sand, dry stone powder; prohibit the usage of water
Occupational Standard TLV-TWA 0.1 PPM (0.6 mg/m3); STEL 0.5 PPM (3 mg/m3)

Chemical Properties

colourless liquid

Chemical Properties

Phosphorus oxychloride is a clear, colorless to yellow, fuming, oily liquid with a pungent and musty odor.


Phosphorus oxychloride is used to produce hydraulic fluids, plasticizers, and fireretarding agents; as a chlorinating agent; and as a solvent in cryoscopy.


As chlorinating agent, especially to replace oxygen in organic compounds; as solvent in cryoscopy.


A white crystalline solid. It is a monobasic acid forming the anion H2PO2 – in water. The sodium salt, and hence the acid, can be prepared by heating yellow phosphorus with sodium hydroxide solution. The free acid and its salts are powerful reducing agents.

General Description

A colorless fuming liquid with a pungent odor. Density 14.0 lb / gal. Very toxic by inhalation and corrosive to metals and tissue. Used in gasoline additives and hydraulic fluids.

Reactivity Profile

Phosphorus oxychloride is water reactive. Incompatible with strong oxidizing agents, alcohols, bases (including amines). May react vigorously or explosively if mixed with diisopropyl ether or other ethers in the presence of trace amounts of metal salts [J. Haz. Mat., 1981, 4, 291]. Combining the chloride with zinc dust caused immediate ignition, due to the formation of phosphine gas which ignites, [Mellor, 1940, Vol. 8, 1025]. An exotherm starting with the mixing of Phosphorus oxychloride with acetone (a ketone) lead to an explosion, may behave similarly with other ketones, [Organic Process Research and Development, Vol.4, No. 6,200, "Phosphorus oxychloride and Acetone: An Incompatibility Investigation Using ARC."]

Health Hazard

Health Hazards : This poison is toxic by inhalation and ingestion and is strongly irritating to skin and tissues. It causes burns of the mucous membranes of the mouth and digestive tractand may be fatal.

Health Hazard

Inhalation of vapors of phosphorus oxychloride produced acute and chronic toxicity in test subjects. In humans, exposure to its vapors may cause headache, dizziness, weakness, nausea, vomiting, coughing, chest pain, bronchitis, and pulmonary edema. Most of these symptoms are manifested from chronic exposure to its vapors.
LC50 value, inhalation (rats): 48 ppm (301 mg/m3)/4 h
Vapors of this compound are an irritant to the eyes and mucous membranes. The liquidis corrosive and can cause skin burns. An oral LD50 value for rats is documented to be 380 mg/kg (NIOSH 1986)..

Fire Hazard

Poisonous, corrosive, and irritating gases are generated when Phosphorus oxychloride is heated or is in contact with water. Phosphorus oxychloride may ignite other combustible materials (wood, paper, oil, etc.). Phosphorus oxychloride reacts violently with water. When heated to decomposition, Phosphorus oxychloride emits toxic fumes of chlorides and oxides of phosphorus; Phosphorus oxychloride will react with water or steam to produce heat and toxic and corrosive fumes. Incompatible with carbon disulfide; N,N-dimethylformamide; 2,5-dimethylpyrrole; 2,6-dimethyl- pyridine N-oxide; dimethylsulfoxide; Ferrocene-1,1-dicarboxylic acid; water; and zinc. Do not store with combustible materials, particularly fibrous organic materials, or with electrical or other equipment that can be corroded. Reacts violently with moisture.

Safety Profile

Poison by inhalation and ingestion. A corrosive eye, skin, and mucous membrane irritant. Potentially explosive reaction with water evolves hydrogen chloride and phosphine, which then ignites. Explosive reaction with 2,6dimethylpyridine N-oxide, dimethyl sulfoxide, ferrocene1 ,l'-dicarboxylic acid, pyridne N-oxide (above bO'C), sodmm + heat. Violent reaction or ignition with BI3, carbon disulfide, 2,5-dimethyl pyrrole + dimethyl formamide, organic matter, zinc powder. Reacts with water or steam to produce heat and toxic and corrosive fumes. Incompatible with carbon disulfide, N,Ndimethyl-formamide, 2,5-dunethylpyrrole, 2,6-dimethylpyridine N-oxide, dimethylsulfoxide, ferrocene1 ,I-dicarboxylic acid, water, zinc. When heated to decomposition it emits highly toxic fumes of Cland POx

Potential Exposure

Phosphorus oxychloride is used in the manufacture of pesticides, pharmaceuticals, plasticizers, gasoline additives; and hydraulic fluids.

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. If victim is conscious, administer water, or milk. Do not induce vomiting. Medical observation is recommended for 2448 hours after breathing overexposure, as pulmonary edema may be delayed. As first aid for pneumonitis or pulmonary edema, a doctor or authorized paramedic may consider administering a drug or other inhalation therapy.


UN1810 Phosphorus oxychloride, Hazard class: 6.1; Labels: 6.1-Poisonous materials, 8-Corrosive material, Hazard Zone B.

Purification Methods

Distil the liquid under reduced pressure to separate it from the bulk of the HCl and the phosphoric acid (from hydrolysis); the middle fraction is re-distilled into ampoules containing a little purified mercury. These ampoules are sealed and stored in the dark for 4-6weeks with occasional shaking to facilitate reaction of any free chloride with the mercury. The POCl3 is then again fractionally distilled and stored in sealed ampoules in the dark until required [Herber J Am Chem Soc 82 792 1960]. Lewis and Sowerby [J Chem Soc 336 1957] refluxed their distilled POCl3 with Na wire for 4hours, then removed the Na and again distilled. Use Na only with almost pure POCl3 to avoid explosions. HARMFUL VAPOURS; work in an efficient fume cupboard.


A powerful oxidizer. Violently decomposes in water, forming heat and hydrochloric and phosphoric acids. Violent reaction with alcohols, phenols, amines, reducing agents; combustible materials; carbon disulfide; dimethylformamide, and many other many materials. Rapid corrosion of metals, except nickel and lead.

Waste Disposal

Pour onto sodium bicarbonate. Spray with aqueous ammonia and add crushed ice. Neutralize and pour into drain with running water. In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers. Must be disposed properly by following package label directions or by contacting your local or federal environmental control agency, or by contacting your regional EPA office.

Phosphorus oxychloride Preparation Products And Raw materials

Raw materials

Preparation Products

Phosphorus oxychloride Suppliers

Global( 226)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-55531817 CHINA 22043 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693 CHINA 20786 55
Mainchem Co., Ltd.
+86-0592-6210733 CHINA 32651 55
Hubei Jusheng Technology Co.,Ltd.
86-188-71490254 CHINA 20229 58
career henan chemical co
+86-371-86658258 CHINA 19997 58
Dalian Idery Biotechnology Co., Ltd. 0411-62696576/0411-66160116/15141125520
0411-66160116 China 84 58
Nanjing Huang Tai Pharmaceutical Technology Co. Ltd. 18551845925QQ3569572487
025-58803650 China 1856 58
Nanjing Xiezun Chemical Co., Ltd. 025-85629050 13912997845
025-85629050 China 39 60
Shanghai Song Yuan Chemical Technology Co., Ltd. 18521000990
86-021-33275113 China 6646 50
Nanjing Vital Chemical Co., Ltd. Please Send Email QQ:3500919436
025-87193546 China 9156 60

View Lastest Price from Phosphorus oxychloride manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2018-12-17 Phosphorus oxychloride
US $1.00 / kg 1kg 99% 100KG career henan chemical co

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