Arsenic (III) Selenide


Product # 1159
Name Arsenic (III) Selenide
Synonyms Arsenic triselenide
Formula As2Se3
Purity 99.999%
CAS Number 1303-36-2
Molecular Weight 366.72
Color & Form Brown to black powder
Melting Point 360° C
Specific Gravity 4.75 gm/ml
Solubility Insoluble


5 gm $45.00
25 gm $85.00
  • For other quantities or purities not listed, please request a quotation. We can offer many items in bulk or custom packaging.
  • All pricing is subject to confirmation at the time the order is placed.


Transportation Information UN1557, Arsenic compounds, solid, n.o.s., 6.1, II (DOT)
Air Transportation Information UN1557, Arsenic compound, solid, n.o.s., 6.1, II (IATA)
Pictogram Pictogram: Acute 
Signal Word Danger
Hazardous Statements

H300  Fatal if swallowed.

H330  Fatal if inhaled.

H335  May cause respiratory irritation.

Precautionary Phrases

P260  Do not breathe dust/fume/gas/mist/vapours/spray.

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

P284  Wear respiratory protection.

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

P405  Store locked up.

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

Featured Element: Bismuth

Bismuth is a brittle crystalline which is slightly pinkish in its elemental form.

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