Arsenic acid
Also known as: Arsenic acid (H3AsO4), Orthoarsenic acid, Arsenic acid, hemihydrate, crabgrasskiller, desiccantl-10, dessicantl-10, scorch, zotox
Arsenic acid (CAS 7778-39-4) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula AsH3O4 and a molecular weight of 141.94300 g/mol. Key properties include a melting point of >300 °C(lit.), a boiling point of 160ºC and a density of 1.485. No supplier offers are currently listed; request a quote. Record last updated Nov 3, 2026.
- CAS No.
- 7778-39-4
- Jingsj CID
- J-1993672-7
- Molecular Formula
- AsH3O4
- Molecular Weight
- 141.94300 g/mol
- Category
- Inorganic Chemicals
- Last updated
- 11/3/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | >300 °C(lit.) |
|---|---|
| Boiling Point | 160ºC |
| Density | 1.485 |
| Exact Mass | 141.92500 |
| PSA | 77.76000 |
| Additional Property | 0.1 g/100 mL (20 ºC) |
Frequently Asked Questions
What is the CAS number of Arsenic acid?
The CAS number of Arsenic acid is 7778-39-4.
What are the molecular formula and molecular weight of Arsenic acid?
Arsenic acid has molecular formula AsH3O4 and molecular weight 141.94300 g/mol.
What are the upstream and downstream products of Arsenic acid?
For Arsenic acid, Upstream Products: arsane, Potassium iodate, sodium dihydrogen arsenate; Downstream Products: 7-(Trifluoromethyl)quinoline, 5-(Trifluoromethyl)quinoline, 5-Nitroquinoline.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Arsenic acid (CAS 7778-39-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993672-7 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.