Potassium dihydrogen arsenate
Also known as: Arsenic acid potassium salt, Arsenic acid, monopotassium salt, Dihydrogen potassium arsenate, Hydrogen potassium arsenate (H2KAsO4), Macquer's salt, Monopotassium arsenate, Monopotassium dihydrogen arsenate, Potassium acid arsenate, Potassium arsenate (KH2AsO4), Potassium arsenate monobasic, Potassium arsenate monobasic anhydrous, Potassium dihydrogen arsenate, Potassium dihydrogen orthoarsenate, Potassium hydrogen arsenate, arsenic acid potassium, monopotassium arsenate, potassium dihydroorthoarsenate, Potassium dihydrogenarsenate
Potassium dihydrogen arsenate (CAS 7784-41-0) is a compound in the Inorganic Chemicals category listed in the Jingsj chemical database. It has the molecular formula AsH2KO4 and a molecular weight of 180.03300 g/mol. Key properties include a melting point of 288ºC and a density of 2.867. It is classified under GHS with signal word Danger and hazard statements H301 — Toxic if swallowed, H331 — Toxic if inhaled and H350 — May cause cancer. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.
- CAS No.
- 7784-41-0
- Jingsj CID
- J-27955-8
- Molecular Formula
- AsH2KO4
- Molecular Weight
- 180.03300 g/mol
- Category
- Inorganic Chemicals
- Last updated
- 8/21/2026
No offers for this compound yet.
Request a quotePhysicochemical Properties
| Melting Point | 288ºC |
|---|---|
| Density | 2.867 |
| Exact Mass | 179.88100 |
| PSA | 80.59000 |
GHS Safety & Compliance
- H301 — Toxic if swallowed
- H331 — Toxic if inhaled
- H350 — May cause cancer
- H410 — Very toxic to aquatic life with long lasting effects
Frequently Asked Questions
What is the CAS number of Potassium dihydrogen arsenate?
The CAS number of Potassium dihydrogen arsenate is 7784-41-0.
What are the molecular formula and molecular weight of Potassium dihydrogen arsenate?
Potassium dihydrogen arsenate has molecular formula AsH2KO4 and molecular weight 180.03300 g/mol.
Is Potassium dihydrogen arsenate hazardous?
Potassium dihydrogen arsenate has GHS signal word Danger and hazard statements H301 — Toxic if swallowed; H331 — Toxic if inhaled; H350 — May cause cancer.
What are the upstream and downstream products of Potassium dihydrogen arsenate?
For Potassium dihydrogen arsenate, Upstream Products: Arsenic acid, Potassium carbonate, Potassium iodate; Downstream Products: Arsenic 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. "Potassium dihydrogen arsenate (CAS 7784-41-0)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-27955-8 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.