WHMIS (Sodium hydroxide 16%)

Workplace Hazardous Materials Information System

WHMIS 2015 classification - Note to reader
Update: 2019-05-22

  • Skin corrosion/irritation - Category 11
    • Contains >= 1% of a base with a pH >= 11,5
  • Serious eye damage/eye irritation - Category 11 2 3
  • Specific target organ toxicity - single exposure (respiratory tract irritation) - Category 3 - Respiratory tract irritation

  • WHMIS 2015 pictogram : Corrosion

  • WHMIS 2015 pictogram : Exclamation mark


Causes severe skin burns and eye damage (H314)
May cause respiratory irritation (H335)

Ingredient disclosure

Comments4 : This product could be corrosive to metals, please contact the supplier for additionnal information.


  • ▲1.  Centre canadien d'hygiène et de sécurité au travail, CHEMINFO, Hamilton, Ont. : Canadian Centre for Occupational Health and Safety   http://ccinfoweb.ccohs.ca/cheminfo/search.html
  • ▲2.  National Institute for Occupational Safety and Health, RTECS (Registry of Toxic Effects of Chemical Substances). Hamilton (Ont) : Canadian Centre for Occupational Health and Safety.   http://ccinfoweb.ccohs.ca/rtecs/search.html
  • ▲3.  Grant, W.M. et Schuman, J.S., Toxicology of the eye : effects on the eyes and visual systems from chemicals, drugs, metals and minerals, plants, toxins and venoms; also, systemic side effects from eye medications. Vol. 2, 4éme éd. Springfield, ILL : Charles C. Thomas. (1993). [RM-515030]
  • ▲4.  National association of corrosion engineers, Corrosion data survey : metals section. 6th ed. Houston, Tex. : Nace Publications. (1985). [RT-439006]

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