Dibutyl phosphite
Dibutyl phosphite (CAS: 1809-19-4), with the linear formula (CH3CH2CH2CH2O)2P(O)H and a molecular weight of 194.21 g/mol, is a key organic phosphorus compound. This chemical serves as a versatile building block in organic synthesis. It is particularly valuable in the production of various industrial chemicals and specialty materials. Dibutyl phosphite is soluble in water, highlighting its utility in aqueous reaction systems.

Organic Synthesis Intermediate
Dibutyl phosphite is utilised as a reactive intermediate in the synthesis of more complex organic molecules. Its phosphorus-oxygen-hydrogen structure allows for various chemical transformations, making it a valuable component in multistep synthetic routes.
Building Block for Specialty Chemicals
It functions as a fundamental building block in the creation of specialty chemicals. The compound can be incorporated into larger structures to impart specific properties, finding use in the development of novel materials.
Reagent in Phosphorus Chemistry
As an organophosphorus compound, dibutyl phosphite is employed as a reagent in reactions involving phosphorus. It can be used in phosphorylation or related reactions, contributing to the diversity of phosphorus-containing compounds.
| Molecular weight | 194.21 |
|---|---|
| Linear formula | (CH3CH2CH2CH2O)2P(O)H |
| Assay | 96% |
| Boiling point | 118-119 °C/11 mmHg(lit.) |
| Density | 0.995 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.423(lit.) |
| Solubility | H2O: soluble7.3 g/L at 25 °C |
| Vapour pressure | <0.1 mmHg (20 °C) |
| Impurities tested | ≤1% butanol |
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
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 phosphite primarily used for?
+
Dibutyl phosphite is primarily used as a versatile building block and intermediate in organic synthesis, particularly in the creation of specialty chemicals and other phosphorus-containing compounds.
What is the CAS number and formula for Dibutyl phosphite?
+
The CAS number for Dibutyl phosphite is 1809-19-4, and its linear formula is (CH3CH2CH2CH2O)2P(O)H.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies Dibutyl phosphite with an assay of 96%. We do not represent this product as USP, BP, or EP grade.
How should Dibutyl phosphite be handled safely?
+
Safety precautions include avoiding breathing mist/vapours/spray (P261) and wearing protective gloves/protective clothing/eye protection/face protection (P280). If in eyes, rinse cautiously with water for several minutes (P305 + P351 + P338).
Does Tech Serve Solutions export Dibutyl phosphite?
+
Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, including Dibutyl phosphite, which we can ship internationally.
How can I request a quote or sample of Dibutyl phosphite?
+
To request a quote or sample of Dibutyl phosphite, please contact our sales team through the website or by phone, providing your specific requirements.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis