Phenylphosphonic acid
Also known as: Benzenephosphonic acid, PPOA, phenylphosphonate, Phosphonic acid, phenyl-, Dihydrogen phenylphosphonate, Phenylphosphonic acid (PPOA)
Phenylphosphonic acid (CAS 1571-33-1) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C6H7O3P and a molecular weight of 158.092 g/mol. Key properties include a melting point of 162-164 °C(lit.), a boiling point of 353.7±25.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 167.7±23.2 °C. It is classified under GHS with signal word Danger and hazard statements H302 — Harmful if swallowed and 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.
- 1571-33-1
- Jingsj CID
- J-34955-3
- Molecular Formula
- C6H7O3P
- Molecular Weight
- 158.092 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 162-164 °C(lit.) |
|---|---|
| Boiling Point | 353.7±25.0 °C at 760 mmHg |
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 167.7±23.2 °C |
| Exact Mass | 158.013275 |
| PSA | 67.34000 |
| LogP | 0.54 |
| Vapor Pressure | 0.0±0.8 mmHg at 25°C |
| Refractive Index | 1.572 |
| Additional Property | 40.4 g/100 mL (25 ºC) |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- 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 Phenylphosphonic acid?
The CAS number of Phenylphosphonic acid is 1571-33-1.
What are the molecular formula and molecular weight of Phenylphosphonic acid?
Phenylphosphonic acid has molecular formula C6H7O3P and molecular weight 158.092 g/mol.
Is Phenylphosphonic acid hazardous?
Phenylphosphonic acid has GHS signal word Danger and hazard statements H302 — Harmful if swallowed; H314 — Causes severe skin burns and eye damage.
What are the upstream and downstream products of Phenylphosphonic acid?
For Phenylphosphonic acid, Upstream Products: Dichlorophenylphosphine, Diethyl phenylphosphonate, benzene; Downstream Products: Phenylphosphonic dichloride, 1,4-Dibromobenzene, Phosphoric acid.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Phenylphosphonic acid (CAS 1571-33-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-34955-3 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.