Phosphorus trichloride
Also known as Trichlorophosphine, Phosphorous trichloride, Phosphorous chloride
Key facts
What buyers check first
- Appearance
- Clear colorless, fuming liquid
- Melting point
- -93.6 °C
- Boiling point
- 76.1 °C
- Density
- Relative density (water = 1): 1.6
- Solubility
- Reacts with water, ethanol, soluble in benzene, chloroform, ether
- HS code
- 281213
- Category
- Chlorides and other halides
- UN number
- UN 1809
What is Phosphorus trichloride?
Plain description, key identifiers and synonyms
Phosphorus trichloride is a phosphorus halide with formula Cl3P.
Identifiers
Registry numbers, names and line notations, tap to copy
- IUPAC name
- trichlorophosphane
- CAS number
- 7719-12-2 CAS number cross-checked
- EC number
- 231-749-3
- Molecular formula
- Cl3P
- UNII
- M97C0A6S8U
- MDL number
- MFCD00011438
- InChIKey
- FAIAAWCVCHQXDN-UHFFFAOYSA-N
- InChI
- InChI=1S/Cl3P/c1-4(2)3
- SMILES (canonical and isomeric)
- P(Cl)(Cl)Cl
Synonyms
- Trichlorophosphine
- Phosphorous trichloride
- Phosphorous chloride
- Phosphine, trichloro-
- Fosfortrichloride
- Phosphortrichlorid
- Trojchlorek fosforu
- Phosphorus chloride (PCl3)
- Phosphorus chloride (Cl6P2)
- Fosforo(tricloruro di)
- Phosphore(trichlorure de)
- trichlorophosphane
- Phosphorus(III) chloride
- PCl3
- Phosphorustrichloride
- Phosphorus trichloride, ReagentPlus(R), 99%
- trichloridophosphorus
- phosphoroustrichloride
- phosphorus-trichloride
- Chloride of phosphorus
- Cl3P
- phosphorous tri-chloride
- Phosphorus(III)chloride
- Phosphorous(III) chloride
- Phosphorus trichloride, CP
Show all 30 synonymsShow fewer synonyms
- phosphorous (III) chloride
- [PCl3]
- phosphorus (III) trichloride
- UN 1809
- Phosphorus trichloride, purum, >=97.0% (AT)
Physical and chemical properties
Measured values and descriptors computed from the structure
Physical and chemical properties
Measured values, check the supplier specification for your grade
| Appearance | Clear colorless, fuming liquidexp.Measured value |
|---|---|
| Odour | Pungentexp.Measured value |
| Melting point | -93.6 °Cexp.Measured value |
| Boiling point | 76.1 °Cexp.Measured value |
| Density | Relative density (water = 1): 1.6exp.Measured value |
| Autoignition temperature | Not flammableexp.Measured value |
| Solubility | Reacts with water, ethanol, soluble in benzene, chloroform, etherexp.Measured value |
| Vapour pressure | 120 mm Hg at 25 °Cexp.Measured value |
Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.
Computed descriptors
Calculated from the structure, useful for screening and formulation
| Molecular weight | 137.33 g/molcalc.Computed value |
|---|---|
| Exact mass | 135.8803 Dacalc.Computed value |
| LogP (octanol/water) | 2.93calc.Computed value |
| Topological polar surface area | 0 Ųcalc.Computed value |
| Hydrogen bond donors | 0calc.Computed value |
| Hydrogen bond acceptors | 0calc.Computed value |
| Rotatable bonds | 0calc.Computed value |
| Heavy atoms | 4calc.Computed value |
| Rings | 0calc.Computed value |
| Aromatic rings | 0calc.Computed value |
| Fraction sp3 carbons | 0calc.Computed value |
| Formal charge | 0calc.Computed value |
| Stereocentres | 0calc.Computed value |
Calculated for screening. Confirm critical figures with the supplier.
Safety and hazards
GHS classification summary, not a safety data sheet
Hazard statements
- H300Fatal if swallowed.
- H314Causes severe skin burns and eye damage.
- H330Fatal if inhaled.
- H373May cause damage to organs through prolonged or repeated exposure.
Precautionary statements (20)
- P260Do not breathe dust, fume, gas, mist, vapours or spray.
- P264Wash skin thoroughly after handling.
- P270Do not eat, drink or smoke when using this product.
- P271Use only outdoors or in a well-ventilated area.
- P280Wear protective gloves, protective clothing, eye protection and face protection.
- P284In case of inadequate ventilation wear respiratory protection.
- P301 + P316If swallowed: Get emergency medical help immediately.
- P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
- P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
- P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
- P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
- P316Get emergency medical help immediately.
- P319Get medical help if you feel unwell.
- P320Specific treatment is urgent (see supplemental first aid instructions on the label).
- P321Specific treatment (see supplemental first aid instructions on the label).
- P330Rinse mouth.
- P363Wash contaminated clothing before reuse.
- P403 + P233Store in a well-ventilated place. Keep container tightly closed.
- P405Store locked up.
- P501Dispose of contents and container in accordance with local regulations.
- UN number
- UN 1809
- Transport hazard class
- 6.1
- Packing group
- I
GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.
Full safety data and first aidPhosphorus trichloride suppliers
Controlled substance, listings of documented suppliers only, in the documented ranking
Phosphorus trichloride is controlled. Only documented suppliers can list it, and buyers must upload a valid licence with their request. Every request is reviewed before suppliers see it.
Licensed buyers only, every enquiry is reviewed by our compliance team.
Reference: OPCW Chemical Weapons Convention Schedule 3, HS 2022 subheading 2812.13 (phosphorus trichloride, a common industrial chemical)
Our policy on controlled substancesLicensed buyers can post a request for Phosphorus trichloride with their licence. Our compliance team reviews it before suppliers see it.
Phosphorus trichloride price
Indicative price range per kg from live supplier offers
Suppliers quote this chemical on request. Send one free request and compare quotes side by side.
Uses and applications
What the substance is used for, by industry and function
Making phosphorus oxychloride, int for organophosphorus pesticides, surfactants, phosphites (reactions with alcohols and phenols), gasoline additives, plasticizers, dyestuffs, chlorinating agent, catalyst, preparing rubber surfaces for electrodeposition of metal, ingredient of textile finishing agents.
As an intermediate or reagent in the manufacture of many industrial chemicals, ranging from insecticides to synthetic surfactants to ingredients for silver polish.
Phosphorus trichloride is mainly used for the manufacture of phosphoryl chloride, phosphorus pentachloride, thiophosphoryl chloride, and phosphonic acid. It is the starting material in the production of organophosphorus compounds. ... Phosphorus trichloride is an important intermediate in the production of phosphate ester insecticides. ...
Read more
In organic chemistry, phosphorus trichloride is used as a chlorinating agent and catalyst.
Phosphorus trichloride ... is used ... during the chemical synthesis of ... pharmaceuticals ... and (to make) the surfactants that are used during deposition of metallic coatings. It is used to treat polypropylene before drying in the manufacture of knitted fabrics.
Industries and functions
How it is made
Prepared from red phosphorus and dry chlorine in the presence of refluxing PCl3.
In a Hoechst continuous process, molten white phosphorus and gaseous chlorine react in previously produced phosphorus trichloride. The formation of phosphorus pentachloride is prevented by the presence of a small excess of phosphorus. The heat of reaction, ca. 10 times the heat of evaporation, keeps the system at its boiling point, and the phosphorus trichloride distills off. The vapors are fractionated as reflux takes place, and the PCl3 condenses in air-cooled condensers. The rate of removal of PCl3 (i.e.
Read more
the production rate) is equivalent to the feed rate of phosphorus and chlorine. The process is controlled by the boiling temperature, which is determined by the phosphorus content. The rate of chlorine flow is fixed, and the phosphorus feed rate is adjusted manually. The phosphorus trichloride produced contains no free phosphorus and needs no further treatment.
Phosphorus trichloride (PCl3) is made by reacting yellow phosphorus with chlorine ...
Regulatory status
Inventories, regulations and trade controls that list this substance
Phosphorus trichloride is controlled. Only documented suppliers can list it, and buyers must upload a valid licence with their request. Every request is reviewed before suppliers see it.
Licensed buyers only, every enquiry is reviewed by our compliance team.
Reference: OPCW Chemical Weapons Convention Schedule 3, HS 2022 subheading 2812.13 (phosphorus trichloride, a common industrial chemical)
Our policy on controlled substancesEurope
- EU harmonised classification (CLP Annex VI)Index no: 015-007-00-4
Controls
- Chemical Weapons Convention Schedule 3
United States
- TSCA inventory (USA)Status: Active in US commerce
HS code and trade data
Customs classification and reported world trade statistics
Global trade
World import and export statistics for the HS code Phosphorus trichloride is traded under.
Phosphorus trichloride
- United Kingdom32.0%
- South Korea31.4%
- United States23.4%
* Partner reported figures, a lower bound.
The HS code shown for Phosphorus trichloride is indicative (it was matched by name in the HS nomenclature). Confirm the classification with your customs broker before shipping.
Frequently asked questions
Quick answers about Phosphorus trichloride, based on the data on this page
What is Phosphorus trichloride?
What is the CAS number of Phosphorus trichloride?
What is the molecular formula and weight of Phosphorus trichloride?
What is Phosphorus trichloride used for?
Is Phosphorus trichloride hazardous?
What is the HS code of Phosphorus trichloride?
Can I buy Phosphorus trichloride on CompoundList?
Guides for buyers
Practical guides that help when you source, ship or handle Phosphorus trichloride
- Guide, SafetyHow to read a safety data sheet in 10 minutesA section by section method to pull the essentials out of any 16 section SDS: identity, hazards, composition, storage, PPE, properties, transport and emergency measures.Read
- Guide, Trade and logisticsShipping dangerous goods: UN numbers, classes and packing groupsHow the UN dangerous goods system works for chemicals, from the nine classes and UN numbers to packing groups, UN packaging marks, labels, documents and segregation.Read
- Guide, SafetyGHS pictograms, signal words and hazard statements explainedA practical guide to the nine GHS pictograms, the signal words Danger and Warning, H and P statements, and how to read a chemical label in seconds.Read
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