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tributyl phosphate

Tributyl Phosphate (TBP)

Tributyl Phosphate (TBP) is an organic compound widely used as a solvent and extractant for purifying nuclear fuel, rare-earth metals, and some mineral acids. It is also used as an ingredient in various industrial and consumer products, including lubricants, paints, and pesticides.

CAS No.: 126-73-8 

Molecular formula:(C4H9O)3PO 

Molecular weight: 266.32 (according to the Standard Atomic Weights 1987)

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Structure Diagram of Tributyl Phosphate (TBP)

CAS No.:126-73-8

Molecular formula


Molecular weight

266.32 (according to the Standard Atomic Weights 1987)

Molecular structure diagram:

Molecular Structure Diagram


Colorless, odorless and transparent liquid, stable at room temperature.

Melting point

< -80℃

Boiling point


Introduction of Tributyl Phosphate (TBP)


Tributyl Phosphate (TBP) finds applications as an extraction agent for rare earth metals, a solvent in chemical processes, a plasticizer in plastics manufacturing, an anti-foaming agent, a lubricant additive, and a chemical intermediate for the synthesis of various organic compounds.


Packing: 200 kg/galvanized iron drum, 1000 kg/IBC drum


Storage and transportation: Handled with care during transportation to prevent impact. Stored in a cool, ventilated and dry warehouse, ensuring fire prevention and rain proof.

Specifications of Tributyl Phosphate (TBP)


Specific Grade

Export Grade

Reagent Grade


Colorless transparent liquid

Content %




Density (20℃) g/mL



Refractive Index(Nd20)



Acidity (H+ meter) mmol/g




Heating Loss % (105℃/3h)




Moisture %




Regulations And Restrictions On The Use Of Tributyl Phosphate (TBP)


 Occupational Safety and Health: Occupational safety regulations often mandate measures to protect workers who handle TBP. This includes guidelines on personal protective equipment (PPE), exposure limits, ventilation, and training programs to ensure safe handling practices.


 Environmental Regulations: TBP is considered a hazardous substance in many countries, and its release into the environment is subject to strict regulations. Proper containment, storage, and disposal practices are required to prevent contamination of water bodies, soil, and air.


 International Regulations: TBP is regulated under international agreements related to the transport of dangerous goods. The United Nations Recommendations on the Transport of Dangerous Goods provide guidelines for the safe transportation of TBP and impose packaging, labeling, and documentation requirements.


 Specific Industry Regulations: Industries that extensively use TBP, such as the nuclear, pharmaceutical, and chemical sectors, often have their own regulations and guidelines for the safe handling, storage, and disposal of TBP. These regulations may include licensing requirements and monitoring of emissions.

Precautions for Tributyl Phosphate (TBP)

Is Tributyl Phosphate (TBP) Toxic?

Tributyl Phosphate (TBP) can be toxic if ingested, inhaled, or absorbed through the skin in large amounts. It may cause irritation to the skin, eyes, and respiratory tract. Prolonged or repeated exposure to TBP can have harmful effects on the liver, kidneys, and central nervous system. It is important to follow appropriate safety precautions and guidelines when handling TBP.

What Are the Environmental Concerns Associated with Tributyl Phosphate(TBP)?

Tributyl Phosphate (TBP) is not readily biodegradable and can persist in the environment. If released into water bodies, it may have adverse effects on aquatic organisms. Proper handling, storage, and disposal procedures should be followed to minimize the environmental impact of TBP.