WHMIS (Arsenic pentoxide)

Workplace Hazardous Materials Information System

WHMIS 1988 classification - Note to reader
Update: 1993-03-20
  • WHMIS pictogram : Skull and crossbones

    D1A, D2A

  • Very Toxic Material Causing Immediate and Serious Toxic Effects
  • Very Toxic Material Causing Other Toxic Effects
  • carcinogenicity: IARC group 1

Disclosure at 0,1% according to classification criteria

WHMIS 2015 classification - Note to reader
Update: 2015-11-19

  • Acute toxicity - oral - Category 21 2 3
  • Carcinogenicity - Category 1A4 5
  • Specific target organ toxicity - repeated exposure - Category 13

  • WHMIS 2015 pictogram : Skull and crossbones

  • WHMIS 2015 pictogram : Health hazard


Fatal if swallowed (H300)
May cause cancer (H350)
Causes damage to organs through prolonged or repeated exposure (H372)

Ingredient disclosure

Comments: Due to the lack of data, classification regarding specific organ toxicity - repeated exposure (H372) was established by analogy to soluble inorganic arsenic compounds.


The [number] refers to the Information SST database of the CNESST Documentation Center.