CompoundList
Sign in
Flame retardants

Tributyl phosphate

Also known as Tri-n-butyl phosphate, Tributylphosphate, Phosphoric acid tributyl ester

CAS 126-73-8Formula C12H27O4PMolar mass 266.32 g/molEC 204-800-2
GHS signal word: Warning. Pictograms: Harmful or irritant, Serious health hazard 86 suppliers listed
Get quotes Compare 86 suppliers
Tributyl phosphate chemical structure, C12H27O4P, CAS 126-73-8
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless to pale-yellow liquid
Melting point
<-80
Boiling point
289 °C
Density
Relative density (water = 1): 0.98
Flash point
146 °C
HS code
291990
Category
Flame retardants
Illustrative photo, 200 litre blue HDPE drums of liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Tributyl phosphate?

Plain description, key identifiers and synonyms

Tributyl phosphate is a trialkyl phosphate that is the tributyl ester of phosphoric acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
tributyl phosphate
CAS number
126-73-8 CAS number cross-checked
EC number
204-800-2
Molecular formula
C12H27O4P
UNII
95UAS8YAF5
MDL number
MFCD00009436
InChIKey
STCOOQWBFONSKY-UHFFFAOYSA-N
InChI
InChI=1S/C12H27O4P/c1-4-7-10-14-17(13,15-11-8-5-2)16-12-9-6-3/h4-12H2,1-3H3
SMILES (canonical and isomeric)
CCCCOP(=O)(OCCCC)OCCCC

Synonyms

  • Tri-n-butyl phosphate
  • Tributylphosphate
  • Phosphoric acid tributyl ester
  • Tributylphosphat
  • Celluphos 4
  • tbpa
  • Disflamoll TB
  • Tributilfosfato
  • Tributylfosfaat
  • Tributoxyphosphine oxide
  • Phosphoric acid, tributyl ester
  • Tributyle (phosphate de)
  • Butyl phosphate, tri-
  • Tributylfosfat
  • Tri-N-butylphosphate
  • Butyl phosphate, ((BuO)3PO)
  • MCS 2495
  • Tributyl ester of phosphoric acid
  • tri-(n-butyl)-phosphate
  • Phosphoric acid tri-n-butyl ester
  • n-Butyl phosphate
  • TNBP
  • Tri-n-butyl phosphate, Phosphoric acid tributyl ester
  • Tributylphsophate
  • Kronitex TBP
Show all 33 synonyms
  • Tributyl phosphate TBP
  • Tributyle(phosphate de)
  • Tributyl phosphate(TBP)
  • Tris(n-butyl) phosphate
  • tris(1-butyl) phosphate
  • tributyl phosphate (TBP)
  • Tributyl phosphate, 97%
  • Tributyl phosphate, 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

Appearance
Colorless to pale-yellow liquidexp.
Odour
Odorlessexp.
Melting point
<-80exp.
Boiling point
289 °Cexp.
Density
Relative density (water = 1): 0.98exp.
Flash point
146 °Cexp.
Autoignition temperature
410 °Cexp.
Solubility
In water, 280 mg/L at 25 °Cexp.
Vapour pressure
1.13 × 10⁻³ mm Hg at 25 °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
266.32 g/molcalc.
Exact mass
266.1647 Dacalc.
LogP (octanol/water)
4.54calc.
Topological polar surface area
44.76 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
12calc.
Heavy atoms
17calc.
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
Warning
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard
130NFPA 704 rating

Hazard statements

  • H302Harmful if swallowed.
  • H315Causes skin irritation.
  • H351Suspected of causing cancer.
Precautionary statements (13)
  • P203Obtain, read and follow all safety instructions before use.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P318If exposed or concerned, get medical advice.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

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

Tributyl phosphate suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 86 suppliers
30 of 30 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

86 suppliers in 13 countries

Send one request to many suppliers

Choose up to 10 suppliers or let us match your request. Compare quotes side by side, free.

Choose suppliersPost a request

Tributyl phosphate price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

Get latest price

Uses and applications

What the substance is used for, by industry and function

Plasticizer for cellulose esters, lacquers, plastics, and vinyl resins.

Used in fire-resistant aircraft hydraulic fluids.

Heat-exchange medium, solvent extraction of metal ions from solution of reactor products, solvent for nitrocellulose, cellulose acetate, plasticizer, pigment grinding assistant, antifoam agent, dielectric.

Extraction chromatography, in which the organic extractant is adsorbed on the surfaces of a fine, porous powder placed in a column, offers another excellent method for separating the actinide elements from each other. Useful cation extracting agents include ... n-tributyl phosphate.

Industrial uses: Lubricating agent, Hydraulic fluids, Plasticizer, Flame retardant, Defoamer.

Consumer uses: Hydraulic fluids, Flame retardant, Lubricating agent.

Use classes: Industrial.

Pharmacological actions

  • Radiation-Protective Agents

Functional uses

  • Defoamer
  • Flame retardant
  • Plasticizer

Pharmacology

Tri-N-butyl Phosphate is tri-n-butyl phosphate, Bu3-P, TBP. Industrial chemical, used as a plasticizer, in hydraulic fluid, as a solvent and extractant for metal ions, and as a heat exchange agent.

How it is made

Prepared by reaction of POCL3 with butyl alcohol.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 015-014-00-2

Health and food

  • EU Cosmetics Regulation Annex II, prohibited in cosmetics
    Name: Tributyl phosphate, Ref no: 1166, Annex ref: II/1166

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 Tributyl phosphate is traded under.

HS 2919.90Indicative HS code

Phosphoric, and their salts, including lactophosphates, their halogenated, sulphonated, nitrated…

World exports in 2024
$940M
−0.7% vs 2023, imports $863M
2019 to 2024
Top exporters
  1. China55.6%
  2. Germany10.6%
  3. Italy6.2%
Top importers
  1. United States15.8%
  2. South Korea10.1%
  3. Germany6.4%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about Tributyl phosphate, based on the data on this page

What is Tributyl phosphate?

Tributyl phosphate is a trialkyl phosphate that is the tributyl ester of phosphoric acid.

What is the CAS number of Tributyl phosphate?

The CAS registry number of Tributyl phosphate is 126-73-8.

What is the molecular formula and weight of Tributyl phosphate?

The molecular formula of Tributyl phosphate is C12H27O4P and its molar mass is 266.32 g/mol.

What is Tributyl phosphate used for?

Plasticizer for cellulose esters, lacquers, plastics, and vinyl resins. Used in fire-resistant aircraft hydraulic fluids.

Is Tributyl phosphate hazardous?

Tributyl phosphate carries the GHS signal word "Warning". Main hazards: harmful if swallowed, causes skin irritation, suspected of causing cancer. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Tributyl phosphate?

Tributyl phosphate is usually classified under HS code 291990 (Phosphoric esters and their salts, including lactophosphates, their halogenated…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Tributyl phosphate?

CompoundList lists 86 suppliers of Tributyl phosphate in China, United States, Germany, India and 9 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Tributyl phosphate in India?

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

What is the price of Tributyl phosphate?

Suppliers quote Tributyl phosphate 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 Tributyl phosphate

Get quotes for Tributyl phosphate

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Post a request Sell Tributyl phosphate
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
Embed this structure on your websiteShow code

Paste this code into your page to show the 2D structure of Tributyl phosphate with a 3D view, its CAS number where known and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/tributyl-phosphate-126-73-8" title="Tributyl phosphate structure on CompoundList" width="360" height="420" style="border:1px solid #E7E2DA;border-radius:12px;max-width:100%" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Preview the embed

Explore more in Flame retardants or HS code 291990

86 suppliers
Free quotes, contact stays private
Get quotes