Phosphorus trichloride

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Phosphorus trichloride

Chemical Properties Uses Preparation

Product Name: Phosphorus trichloride
CAS No.: 7719-12-2
Chemical Name: Phosphorus trichloride
Synonyms: PCl3;Phosphorous trichloride;PHOSPHORUS CHLORIDE;trichlorophosphane;phosphore(trichlorurede);Trichlorophosphine;Phosphorous chloride;PICl;2125683;Fosfortrichloride
CBNumber: CB6459046
Molecular Formula: Cl3P
Formula Weight: 137.33
MOL File: 7719-12-2.mol

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Phosphorus trichloride Property

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: n20/D 1.5148(lit.)
Flash point:: 76°C
storage temp.: Store at RT.
solubility: Soluble in benzene, carbon sulfide, ether, chloroform, carbon tetrachloride.
form: Liquid
color: Yellow
Specific Gravity: approximate 1.6
Odor: Pungent, irritating odor
PH Range: 1
Water Solubility: reacts
Sensitive: Moisture Sensitive
Merck: 14,7358
BRN: 969177
Dielectric constant: 3.4300000000000002
Dielectric constant: 3.7（18℃）
Exposure limits: TLV-TWA 1.12 mg/m³ (0.2 ppm) (ACGIH), 2.8 mg/m³ (0.5 ppm) (OSHA).
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)

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Safety

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

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H314Causes severe skin burns and eye damage

H373May cause damage to organs through prolonged or repeated exposure

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P314Get medical advice/attention if you feel unwell.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 157791
Product name: Phosphorus trichloride
Purity: 99%
Packaging: 50g
Price: $59.9
Updated: 2024/03/01

Sigma-Aldrich

Product number: 157791
Product name: Phosphorus trichloride
Purity: 99%
Packaging: 1kg
Price: $165
Updated: 2024/03/01

Alfa Aesar

Product number: 022988
Product name: Phosphorus(III) chloride, 99.997% (metals basis)
Packaging: 25g
Price: $288
Updated: 2023/06/20

Alfa Aesar

Product number: 022988
Product name: Phosphorus(III) chloride, 99.997% (metals basis)
Packaging: 100g
Price: $762
Updated: 2023/06/20

Strem Chemicals

Product number: 93-1588
Product name: Phosphorus(III) chloride (99.998%-P) PURATREM
Packaging: 10g
Price: $90
Updated: 2024/03/01

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Phosphorus trichloride Chemical Properties,Usage,Production

Chemical Properties

Phosphorus trichloride (phosphorus chloride, PCl3) is a colourless transparent motile liquid (the boiling point is 76 °C); it fumes in air. It mixes with diethyl ether, petrol, chloroform, carbon disulfide and dichloroethane in all ratios: It can be easily destroyed with water, acids and alcohols. Phosphorus trichloride vapours hydrolyse even in humid air. PCl3 is a strong oxidizer and will readily react with many organic compounds.
Phosphorus trichloride is very poisonous; it causes serious skin burns and can cause death when enters the human body (even in small quantities). The maximum allowable concentration of phosphorus trichloride Vapours in industry is 0.5 mg/m3.

Uses

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.

Preparation

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

Description

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.

Chemical Properties

Phosphorus trichloride is a colorless to yellow, fuming liquid. Odor like hydrochloric acid.

Physical properties

Colorless fuming liquid; pungent odor; refractive index 1.516 at 14°C; density 1.574g/mL at 21°C; boils at 76°C; freezes at -112°C; decomposes in water; soluble in benzene, carbon disulfide, ether and chloroform and other halogenated organic solvents.

Uses

Phosphorus trichloride is used as a chlorinating agent; as an intermediate in making gasoline additives, dyes, surfactants, and pesticides; in the manufacture of phosphorus pentachloride and phosphorus oxychloride; and as a catalyst.

Uses

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.

Production Methods

Phosphorus trichloride (PCl3) is made by reacting yellow phosphorus with chlorine and is used in chemical manufacturing. It hydrolyzes to phosphoric acid and hydrochloric acid.

Definition

ChEBI: Phosphorus trichloride is a phosphorus halide with formula Cl3P.

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.)

Hazard

Phosphorus trichloride is highly corrosive. Its vapors are an irritant to mucous membranes. Chronic exposure to its vapors can cause bronchitis. It reacts violently with water and explodes in contact with acetic and nitric acids, and several other substances (Patnaik. P. 1999. A Comprehensive Guide to the Hazardous Properties of Chemical Substances, 2^nd. Ed. New York: John Wiley & Sons).

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.

Flammability and Explosibility

Non flammable

Safety Profile

Poison by ingestion and inhalation. A corrosive irritant to skin, eyes (at 2 ppm), and mucous membranes. Potentially explosive reaction with chlorobenzene + sodtum, hethyl sulfoxide, molten sodmm, chromyl chloride, nitric acid, sodium peroxide, oxygen (above 100℃), tetravinyl lead. Reacts with carboxylic acids (e.g., acetic acid) to form violently unstable products. Violent reaction or ignition with Al, chromium pentafluoride, dtallyl phosphite + allyl alcohol, F2, hexa fluoroisoprop ylideneaminolithium, hydroxylamine, iodine chloride, PbO2, HNO2, organic matter, potassium, selenium dioxide, sulfur acids (e.g., sulfuric acid, fluorosulfuric acid, oleum). Violent reaction with water evolves hydrogen chloride and diphosphane gas, that then ignite. Incompatible with metals or oxidants. Wdl react with water, steam, or acids to produce heat and toxic and corrosive fumes; can react with oxidzing materials. To fight fire, use CO2, dry chemical. Used as a chlorinating agent, catalyst, and chemical intermedtate. Dangerous; when heated to decomposition it emits highly toxic fumes of Cland POx.

Shipping

UN1809 Phosphorous trichloride, Hazard class: 6.1; Labels: 6.1-Poisonous materials, 8-Corrosive material, Inhalation Zone B.

Purification Methods

Heat it under reflux to expel dissolved HCl, then distil it. It has been further purified by vacuum fractionation several times through a -45o trap into a receiver at -78o. [Forbes Inorg Synth II 145 1946.] HARMFUL VAPOURS.

Incompatibilities

Phosphorus trichloride is a strong reducing Violent reaction with water, producing heat and hydrochloric and phosphorous acids. Violent reaction with hydrides, alcohols, phenols and bases; water, when in contact with combustible organics; chemically active metals: sodium, potassium, aluminum; strong sulfuric or nitric acid. Attacks most metals except nickel and lead; may generate flammable hydrogen gas on contact with metals. Attacks plastics, rubber, and coatings.

Waste Disposal

Decompose with water, forming phosphoric and hydrochloric acids. The acids may then be neutralized and diluted slowly to solution of soda ash and slaked lime with stirring, then flush to sewer with large volumes of water.

Phosphorus trichloride Preparation Products And Raw materials

Raw materials

Distillation equipment Oxygen White phosphorus HEROIN Quartz

Preparation Products

cleaner LS Flame retardant for pure-dacron BIS(DIISOPROPYLAMINO)CHLOROPHOSPHINE O,O'-Dioctadecylpentaerythritol bis(phosphite) 2-Bromopropionic acid INDIUM PHOSPHIDE Vanillic acid Diethyl chlorophosphate Amino tris(methylene phosphonic acid) 2-Methyl-4-nitropyridine TRIS(NONYLPHENYL) PHOSPHITE Naphthol AS-LC 3-Hydroxy-N-naphthalen-1-ylnaphthalene-2-carboxamide Ethephon Glyphosine 2-Bromovaleric acid Diisopropyl phosphite N-(2,5-Dimethoxyphenyl)-2-hydroxydibenzofuran-3-carboxamide alfa-Bromoisovalericacid 3-(1,3-BENZODIOXOL-5-YL)-2-PROPENOYL CHLORIDE OLEOYL CHLORIDE METHAQUALONE Triisopropyl phosphite Sodium N-lauroylsarcosinate 4-[Di(2-chloroethyl)amino]-2-methoxybenzaldehyde BIS(DIETHYLAMINO)CHLOROPHOSPHINE 3-Chloropropyne SALICYLIC ACID 4-NITROPHENYL ESTER Fosfomycin 4'-Chloro-3-hydroxy-2'-methyl-2-naphthanilide 3-Amino-4-chlorobenzenesulfonic acid Pamidronic acid 2-BROMODODECANOIC ACID 4-chloro-1-(dichloromethyl)benzene 2-BROMOOCTANOIC ACID Tricyclohexyl phosphine ETHYLPHOSPHONIC ACID 1H-PYRROLO[2,3-B]PYRIDINE, 4-NITRO- Naphthol AS-D tert-Butyl peroxy-2-ethylhexanoate

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Phosphorus(III) chloride/ 99+%

Phosphorus(III) chloride/ 99.99+%

Phosphorus trichlori

Phosphorus(III) chloride, 98% min