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IRSST - Institut de recherche Robert-Sauvé en santé et en sécurité du travail
OHS Research
Research at the IRSST
Reference Framework
Scientists Directory
Publications and Tools
IRSST's Production
Magazine and Newsletter
Scientific Watch
Documentation Center
Useful Links
Laboratory Services
Laboratories
Analysis and Testing Services
Laboratory Methods
Masks Efficacy Evaluation
Workplace Air Contaminants
Slip Resistance Test for Protective Footwear
Loan, Calibration and Repairs
Recognition Programs
CQ Fibres
Quality Control of Fiber Counts
CQ Vrac
Recognized Laboratories
Interlaboratory quality
control program
Guides and Tools
Instruments and Sampling Material
Register
Research Fund and Partnerships
Research Fund and Partnerships
Grants
Scholarships
Master’s Scholarship and Supplement
Doctoral Scholarship and Supplement
Postdoctoral Fellowship
Research partnerships
Institute
About
Activity Report
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substance
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substance
June 10, 2026
Nitrogen
French name in the regulation:
Azote
CAS :
7727-37-9
Exposure Standards in RROHS regulation
Permissible exposure values (PEV)
ppm
mg/m
3
f/cc
Notes
TWAEV
-
-
-
-
STEV
-
-
-
-
Ceiling
-
-
-
-
Carcinogenicity
Sensitizer
Simple asphyxiant
Percutaneous
Prohibited use
Prohibited recirculation
Minimum exposure
Explosion hazard
Ototoxic
TWA adjustment for unusual work schedules
1C
: No adjustment
CNESST – Toxicological Index Service
Consult REPTOX file:
Nitrogen
Analysis:
Azote
Method: IRSST - 26-C
Sampling protocol
Sampling device:
Parameters:
Flow rate: -
TWA sampling volume: -
STEL sampling volume: -
Remarks:
Since azote is a simple asphyxiant, oxygen in the air is quantified in the field with a direct-reading instrument (DRI).
Analytical protocol
Principle:
Direct reading instrument-Electrochemical cell (DRI-elec)
Remarks:
The minimum reported value is 1% oxygen. The reference method corresponds to calibration of the DRI.
Reference
IRSST. "Étalonnage d'un instrument à lecture direct pour l'analyse de l'oxygène dans l'air". Méthode 26-C. Méthodes d'étalonnage. Montréal: IRSST, 1995.
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