Vinylphosphonic acid
Also known as: ethenylphosphonic acid, ethenephosphonic acid, ethylenephosphonic acid, vinylphosphonate, phosphonic acid, ethenyl-
Vinylphosphonic acid (CAS 1746-03-8) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C2H5O3P and a molecular weight of 108.03300 g/mol. Key properties include a melting point of 41-45 °C(lit.), a boiling point of 266.2ºC at 760mmHg, a density of 1.389 g/mL at 25 °C(lit.) and a flash point of >110.0 °C. 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 Nov 3, 2026.
- CAS No.
- 1746-03-8
- Jingsj CID
- J-1361357-5
- Molecular Formula
- C2H5O3P
- Molecular Weight
- 108.03300 g/mol
- Category
- Organic Acids
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 41-45 °C(lit.) |
|---|---|
| Boiling Point | 266.2ºC at 760mmHg |
| Density | 1.389 g/mL at 25 °C(lit.) |
| Flash Point | >110.0 °C |
| Exact Mass | 107.99800 |
| PSA | 67.34000 |
| LogP | 0.30760 |
| Vapor Pressure | 0.00253mmHg at 25°C |
| Refractive Index | n20/D 1.473 |
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 Vinylphosphonic acid?
The CAS number of Vinylphosphonic acid is 1746-03-8.
What are the molecular formula and molecular weight of Vinylphosphonic acid?
Vinylphosphonic acid has molecular formula C2H5O3P and molecular weight 108.03300 g/mol.
Is Vinylphosphonic acid hazardous?
Vinylphosphonic acid has GHS signal word Danger and hazard statements H314 — Causes severe skin burns and eye damage.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Vinylphosphonic acid (CAS 1746-03-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1361357-5 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.