IRSST - Institut de recherche Robert-Sauvé en santé et en sécurité du travail

Beryllium, inhalable

French name in the regulation: Béryllium, fraction inhalable
CAS : 7440-41-7

Not in the regulation.

CNESST – Toxicological Index Service

Consult REPTOX file:


Béryllium, fraction inhalable

Method: IRSST - 359
Sampling device:
Sampling media required:
928 Plastic IOM, MEC filter, 0.8 µm, 25 mm

Flow rate: 2.0 L/min
TWA sampling volume: 240 L
STEL sampling volume: -
Principle: Inductively coupled plasma spectrometry (ICP-MS)
Precision (%): 2,3
Minimum reported value: 0,0005 µg
Remarks: Specific sampling must be carried out for this substance. This method allows the analysis of chemical elements present in the sample without distinguishing the different chemical forms. The analytical results are expressed as beryllium, inhalable fraction.
IRSST. "Détermination du béryllium dans l'air des lieux de travail". Méthodes analytique. Méthode 359, Montréal, IRSST, 2008.
Following the amendment of Appendix 1 of the Quebec Regulation respecting occupational health and safety (RSST, RLRQ, c. S-2.1, r. 13), part of Quebec Occupational Health and Safety Act, which came into effect on March 26, 2020, the TWAEV, STEL and Ceiling values for certain substances are now expressed in ppm. For these substances, the IRSST performed the conversion calculations to express these TWAEV, TWA and Ceiling values in mg/m3, which thus appears in its Sampling Guide for Air Contaminants in the Workplace (Guide d'échantillonnage des contaminants de l'air en milieu de travail ) and the associated Substance Data Sheets. However, it is imperative to refer to the values expressed in the RSST which are legally binding.