Potassium Dihydrogen Arsenate


Product # 2903
Name Potassium Dihydrogen Arsenate
Synonyms Potassium Arsenate monobasic, Arsenic Acid, monopotassium salt, Potassium hydrogen arsenate, Potassium acid arsenate, Macquers’ salt.
Formula KH2AsO4
Purity 99+%
CAS Number 7784-41-0
Molecular Weight 180.034
Color & Form Clear to white solid
Melting Point 277-283° C
Specific Gravity 1.88 gm/ml
Solubility Highly soluble


5 gm $22.00
25 gm $65.00
  • For other quantities or purities not listed, please request a quotation. We can offer many items in bulk or custom packaging.
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Transportation Information UN1677, Potassium Arsenate, 6.1, II
Pictogram Pictogram: Acute  Pictogram: Health  Pictogram: Environment 
Signal Word Danger
Hazardous Statements

H301+H311  Toxic if swallowed or in contact with skin.

H350  May cause cancer.

H410  Very toxic to aquatic life with long lasting effects.

Precautionary Phrases

P202  Do not handle until all safety precautions have been read and understood.

P261  Avoid breathing dust/fume/gas/mist/vapours/spray.

P264  Wash hands thoroughly after handling.

P270  Do not eat, drink or smoke when using this product.

P271  Use only outdoors or in a well-ventilated area.

P273  Avoid release to the environment.

P281  Use personal protective equipment as required.

P301+P310  IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

P304+P340  IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P308+P313  IF exposed or concerned: Get medical advice/attention.

P403+P233  Store in a well-ventilated place. Keep container tightly closed.

Detailed Safety and Handling Information can be found on our Safety Data Sheet (SDS).

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