Dibutyl phosphate
Dibutyl phosphate (CAS: 107-66-4), with the linear formula (CH3CH2CH2CH2O)2P(O)OH and a molecular weight of 210.21 g/mol, is an organic phosphate compound. It serves as a valuable building block in chemical synthesis and is utilized in various organic chemistry applications. Its properties make it suitable for research and industrial processes requiring specific phosphorus-containing reagents.
- IUPAC
- Phosphoric acid dibutyl ester

Chemical Synthesis
Dibutyl phosphate is employed as a reagent and intermediate in the synthesis of more complex organic molecules. Its phosphate structure allows for diverse chemical transformations.
Organic Building Block
As an organic building block, it contributes specific functional groups to target molecules in multi-step synthetic pathways. It is particularly useful for introducing phosphate ester linkages.
Research and Development
This compound is utilised in laboratory settings for research purposes, exploring new chemical reactions and developing novel materials or compounds.
| Molecular weight | 210.21 |
|---|---|
| Linear formula | (CH3CH2CH2CH2O)2P(O)OH |
| Assay | ≥97.0% (T) |
| Density | 1.06 g/mL at 20 °C(lit.) |


Hazard statements
- H315Causes skin irritation
- H318Causes serious eye damage
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 157 °C / 314.6 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 37/38-41 |
| Safety statements (S) | 26-39 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Dibutyl phosphate used for?
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Dibutyl phosphate (CAS: 107-66-4) is primarily used as a building block in chemical synthesis and for organic chemistry research and development.
What are the CAS number and formula for Dibutyl phosphate?
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The CAS number for Dibutyl phosphate is 107-66-4, and its linear formula is (CH3CH2CH2CH2O)2P(O)OH.
What grade and purity does Tech Serve Solutions supply for Dibutyl phosphate?
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Tech Serve Solutions supplies Dibutyl phosphate with an assay of ≥97.0% (T). We do not represent this product as USP, BP, EP, or other pharmacopoeia grades unless explicitly stated.
How should Dibutyl phosphate be handled safely?
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Dibutyl phosphate is a dangerous substance. It causes skin irritation, serious eye damage, and may cause respiratory irritation. Always wear appropriate personal protective equipment, including eyeshields and gloves, and ensure adequate ventilation. Refer to the Safety Data Sheet (SDS) for detailed handling instructions.
How is Dibutyl phosphate packed, shipped, and exported?
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Dibutyl phosphate is carefully packed according to industry standards to ensure safe transit. Tech Serve Solutions has extensive experience in exporting chemicals globally, complying with all relevant international shipping regulations.
How can I request a quote or sample of Dibutyl phosphate?
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To request a quote or sample of Dibutyl phosphate, please contact our sales team via the website or direct inquiry, providing your contact details and the quantity required.
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