Butylphosphonic acid
Also known as: 1-Butanephosphonic acid, 1-Butylphosphonic acid, n-Butylphosphonic acid, Butanephosphonic acid, Butylphosphonic acid, Phosphonic acid, butyl-, NSC 38367, MFCD00012295
Butylphosphonic acid (CAS 3321-64-0) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C4H11O3P and a molecular weight of 138.10200 g/mol. Key properties include a melting point of 105-107ºC, a boiling point of 274.8ºC at 760mmHg, a density of 1.214g/cm3 and a flash point of 120ºC. It is classified under GHS with signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 3321-64-0
- Jingsj CID
- J-24787-0
- Molecular Formula
- C4H11O3P
- Molecular Weight
- 138.10200 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 105-107ºC |
|---|---|
| Boiling Point | 274.8ºC at 760mmHg |
| Density | 1.214g/cm3 |
| Flash Point | 120ºC |
| Exact Mass | 138.04500 |
| PSA | 67.34000 |
| LogP | 0.96420 |
GHS Safety & Compliance
- H314 — Causes severe skin burns and eye damage
Customs & Trade Information
| HS Code | 2931900090 |
|---|---|
| Summary | 2931900090. other organo-inorganic compounds. VAT:17.0%. Tax rebate rate:13.0%. Supervision conditions:AB(certificate of inspection for goods inward,certificate of inspection for goods outward). MFN tariff:6.5%. General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Butylphosphonic acid?
The CAS number of Butylphosphonic acid is 3321-64-0.
What are the molecular formula and molecular weight of Butylphosphonic acid?
Butylphosphonic acid has molecular formula C4H11O3P and molecular weight 138.10200 g/mol.
Is Butylphosphonic acid hazardous?
Butylphosphonic acid has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage.
What are the upstream and downstream products of Butylphosphonic acid?
For Butylphosphonic acid, Upstream Products: Dibutyl butylphosphonate, Diethyl n-butanephosphonate; Downstream Products: 1-Butanol.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Butylphosphonic acid (CAS 3321-64-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-24787-0 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.