Phenylarsine oxide
Also known as: Oxophenylarsine, PAO, oxo(phenyl)arsane, arsenosobenzene, Arzene, Phenylarsine oxide solution
Phenylarsine oxide (CAS 637-03-6) is a compound in the Aromatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H5AsO and a molecular weight of 168.025 g/mol. Key properties include a melting point of 145-148 °C, a boiling point of 100ºC and a density of 1. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H331 — Toxic if inhaled and H410 — Very toxic to aquatic life with long lasting effects. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 637-03-6
- Jingsj CID
- J-23592-1
- Molecular Formula
- C6H5AsO
- Molecular Weight
- 168.025 g/mol
- Category
- Aromatic Hydrocarbons
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 145-148 °C |
|---|---|
| Boiling Point | 100ºC |
| Density | 1 |
| Exact Mass | 167.955643 |
| PSA | 17.07000 |
| LogP | 0.47410 |
| Appearance | powder | white to yellow |
| Additional Property | DMSO: 50 mg/mL |
GHS Safety & Compliance
- H301 — Toxic if swallowed
- H331 — Toxic if inhaled
- H410 — Very toxic to aquatic life with long lasting effects
Frequently Asked Questions
What is the CAS number of Phenylarsine oxide?
The CAS number of Phenylarsine oxide is 637-03-6.
What are the molecular formula and molecular weight of Phenylarsine oxide?
Phenylarsine oxide has molecular formula C6H5AsO and molecular weight 168.025 g/mol.
Is Phenylarsine oxide hazardous?
Phenylarsine oxide has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H331 — Toxic if inhaled; H410 — Very toxic to aquatic life with long lasting effects.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Phenylarsine oxide (CAS 637-03-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-23592-1 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.