Butylphosphonic dichloride
Butylphosphonic dichloride (CAS: 2302-80-9), with the linear formula CH3(CH2)3P(O)Cl2 and a molecular weight of 174.99 g/mol, is a reactive organophosphorus compound. It serves as a valuable intermediate in organic synthesis. Its primary utility lies in its ability to introduce the butylphosphonyl group into various organic molecules, making it a useful building block for complex chemical structures and phosphorus-containing materials.

Organic Synthesis Intermediate
Butylphosphonic dichloride is employed as a versatile building block in the synthesis of diverse organic compounds. Its reactivity allows for the facile introduction of the butylphosphonyl moiety into target molecules.
Phosphorus Compound Synthesis
This compound acts as a precursor for the creation of various organophosphorus compounds. It is instrumental in developing materials with specific phosphorus-based functionalities.
Research and Development
Utilised in chemical research laboratories for exploring new synthetic pathways and developing novel chemical entities. Its properties are of interest in the field of phosphorus chemistry.
| Molecular weight | 174.99 |
|---|---|
| Linear formula | CH3(CH2)3P(O)Cl2 |
| Assay | 98% |
| Boiling point | 96-97 °C/15 mmHg(lit.) |
| Density | 1.241 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.466(lit.) |


Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H314Causes severe skin burns and eye damage
- H332Harmful if inhaled
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 113 °C / 235.4 °F |
| Transport (UN / ADR) | UN 3265 8 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | C |
| Risk statements (R) | 20/21/22-34 |
| Safety statements (S) | 26-27-28-36/37/39-45 |
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 Butylphosphonic dichloride used for?
+
Butylphosphonic dichloride (CAS: 2302-80-9) is primarily used as an intermediate in organic synthesis and for the preparation of other phosphorus-containing compounds. It functions as a building block for introducing the butylphosphonyl group.
What is the CAS number and formula for Butylphosphonic dichloride?
+
The CAS number for Butylphosphonic dichloride is 2302-80-9, and its linear formula is CH3(CH2)3P(O)Cl2.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies Butylphosphonic dichloride with a minimum purity of 98%. This product is typically considered a technical or research grade material, and TSS does not represent it as USP, BP, or EP grade.
How should Butylphosphonic dichloride be handled safely?
+
Butylphosphonic dichloride is a corrosive substance classified under GHS05 and GHS07 with the signal word 'Danger'. It causes severe skin burns and eye damage, and is harmful if swallowed, inhaled, or in contact with skin (H302-H312-H314-H332). Appropriate personal protective equipment, including gloves, goggles, and respiratory protection, must be used. Ensure adequate ventilation.
How is Butylphosphonic dichloride shipped and exported?
+
Butylphosphonic dichloride is shipped and exported according to international regulations for hazardous materials. It is classified under UN 3265, Hazard Class 8, Packing Group II, and is typically transported in suitable UN-approved packaging.
How can I request a quote or sample for Butylphosphonic dichloride?
+
To request a quote or sample of Butylphosphonic dichloride, please contact the Tech Serve Solutions sales department through our website or by phone, providing your contact details and the quantity required.
▶ 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