WHMIS (Naphthalene diisocyanate)

Workplace Hazardous Materials Information System

WHMIS 2015 classification - Note to reader
Update: 2016-07-29

  • Respiratory sensitization - Category 11 2
  • Skin sensitization - Category 13
  • Specific target organ toxicity - single exposure (respiratory tract irritation) - Category 3 - Respiratory tract irritation

  • WHMIS 2015 pictogram : Health hazard

  • WHMIS 2015 pictogram : Exclamation mark


May cause allergy or asthma symptoms or breathing difficulties if inhaled (H334)
May cause allergic skin reaction (H317)
May cause respiratory irritation (H335)

Ingredient disclosure

Comments: Due to the lack of data, classifications regarding respiratory sensitization (H334), skin sensitization (H317) and respiratory irritation (H335) were established by analogy to diisocyanates.


  • ▲1.  Malo, J.-L., Chang-Yeung, M. et Bernstein, D.I., Asthma in the workplace. 4th ed. New York : CRC Press / Taylor @ Francis Group. (2013). [MO-002878]   http://www.taylorandfrancis.com
  • ▲2.  FUORTES, L.J., KIKEN, S et MAKOWSKY, M. , «AN OUTBREAK OF NAPHTHALENE DI-ISOCYANATE-INDUCED ASTHMA IN A PLASTICS FACTORY .» Archives of environmental health. Vol. 50, no. 5, p. 337-340. (1995). [AP-048535]
  • ▲3.  Rustemeyer, T. et al., Kanerva's occupational dermatology. Vol. 1 à 3, 2nd ed. Heidelberg, Allemagne : Springer. (2012). [RM-015009]

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