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Ligands for catalysis

Tributylphosphine

Also known as Tributylphosphane, Tri-n-butylphosphine, Phosphine, tributyl-

CAS 998-40-3Formula C12H27PMolar mass 202.32 g/molEC 213-651-2
GHS signal word: Danger. Pictograms: Flammable, Corrosive, Harmful or irritant, Hazardous to the environment 29 suppliers listed
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Tributylphosphine chemical structure, C12H27P, CAS 998-40-3
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Liquid
Boiling point
240 °C
Density
0.812 @25 °C
HS code
293149
Category
Ligands for catalysis
UN number
UN 3254
Illustrative photo, closed blue jerry cans in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Tributylphosphine?

Plain description, key identifiers and synonyms

Tributylphosphine is a colorless to yellowish liquid with a strong garlic-like odor. It is insoluble in water. It is liable to heat and ignite spontaneously in air. If involved in a fire phosphine gas, a highly flammable and toxic gas, will evolve. It is irritating to mucous membranes.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
tributylphosphane
CAS number
998-40-3 CAS number cross-checked
EC number
213-651-2
Molecular formula
C12H27P
UNII
0O52FJR7WN
MDL number
MFCD00009462
InChIKey
TUQOTMZNTHZOKS-UHFFFAOYSA-N
InChI
InChI=1S/C12H27P/c1-4-7-10-13(11-8-5-2)12-9-6-3/h4-12H2,1-3H3
SMILES (canonical and isomeric)
CCCCP(CCCC)CCCC

Synonyms

  • Tributylphosphane
  • Tri-n-butylphosphine
  • Phosphine, tributyl-
  • Tris(butyl)phosphine
  • Tributylfosfin
  • tributyl phosphine
  • Tri-n-butyl phosphine
  • tributyl-phosphane
  • Bu3P
  • PBu3
  • P(N-BU)3
  • tributyiphophine
  • tributylphoshine
  • tributylphospine
  • Tribuylphosphine
  • Tributylphosphorus
  • tri-butylphosphine
  • tributy-lphosphine
  • Tributyl-phosphine
  • tri-n-butylphosphin
  • nBu3P
  • tri n-butylphosphine
  • Tri-n-butylphosphane
  • tri-n-butyl phosphin
  • tri n-butyl phosphine
Show all 37 synonyms
  • tri(n-butyl)phosphine
  • tri-n-butyl-phosphine
  • Tributylphosphane [UN3254] [Spontaneously combustible]
  • n-Bu3P
  • tris n-butyl phosphine
  • tri-(n-butyl)phosphine
  • PBu(n)3
  • (n-Bu)3P
  • (Bu)3P
  • P(Bu)3
  • Tri-n-butylphosphine, 97%
  • Tri-n-butylphosphine, 99%

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

Physical form
Liquidexp.
Boiling point
240 °Cexp.
Density
0.812 @25 °Cexp.
Vapour pressure
16 [mm Hg] @121 °Cexp.

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
202.32 g/molcalc.
Exact mass
202.185 Dacalc.
LogP (octanol/water)
4.87calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
9calc.
Heavy atoms
13calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
1calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS02: Flammable
Flammable
GHS05: Corrosive
Corrosive
GHS07: Harmful or irritant
Harmful or irritant
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H226Flammable liquid and vapour.
  • H250Catches fire spontaneously if exposed to air.
  • H251Self-heating, may catch fire.
  • H302Harmful if swallowed.
  • H312Harmful in contact with skin.
  • H314Causes severe skin burns and eye damage.
  • H318Causes serious eye damage.
  • H411Toxic to aquatic life with long lasting effects.
Precautionary statements (38)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P222Do not allow contact with air.
  • P231Handle and store contents under inert gas.
  • P233Keep container tightly closed.
  • P235Keep cool.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P335 + P334If on skin: Brush off loose particles from skin. Immerse in cool water or wrap in wet bandages.
  • P302 + P352If on skin: Wash with plenty of water.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • 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.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P363Wash contaminated clothing before reuse.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P391Collect spillage.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • P405Store locked up.
  • P407Maintain air gap between stacks or pallets.
  • P410Protect from sunlight.
  • P413Store bulk masses at temperatures not exceeding the specified limit.
  • P420Store separately.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 3254
Transport hazard class
4.2
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 aid

Tributylphosphine suppliers

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All 29 suppliers
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Where suppliers are based

29 suppliers in 7 countries

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Tributylphosphine price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

Industrial uses: Intermediate.

Regulatory status

Inventories, regulations and trade controls that list this substance

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 Tributylphosphine is traded under.

HS 2931.49Indicative HS code

Non-halogenated organo-phosphorous derivatives, other

World exports in 2024
$3.44B
−6.5% vs 2023, imports $3.07B
2022 to 2024
Top exporters
  1. China54.9%
  2. United States25.4%
  3. Germany5.1%
Top importers
  1. United States20.9%
  2. Argentina14.9%
  3. Brazil14.3%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Tributylphosphine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Tributylphosphine, based on the data on this page

What is Tributylphosphine?

Tributylphosphine is a colorless to yellowish liquid with a strong garlic-like odor. It is insoluble in water. It is liable to heat and ignite spontaneously in air. If involved in a fire phosphine gas, a highly flammable and toxic gas, will evolve. It is irritating to mucous membranes.

What is the CAS number of Tributylphosphine?

The CAS registry number of Tributylphosphine is 998-40-3.

What is the molecular formula and weight of Tributylphosphine?

The molecular formula of Tributylphosphine is C12H27P and its molar mass is 202.32 g/mol.

What is Tributylphosphine used for?

Industrial uses: Intermediate.

Is Tributylphosphine hazardous?

Tributylphosphine carries the GHS signal word "Danger". Main hazards: flammable liquid and vapour, catches fire spontaneously if exposed to air, self-heating, may catch fire. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Tributylphosphine?

Tributylphosphine is usually classified under HS code 293149 (Non-halogenated organo-phosphorous derivatives, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Tributylphosphine?

CompoundList lists 29 suppliers of Tributylphosphine in China, United States, India, Canada and 3 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Tributylphosphine in India?

3 suppliers in India list Tributylphosphine on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Tributylphosphine?

Suppliers quote Tributylphosphine on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Tributylphosphine

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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