|
+
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
Organization Chart
Policies
Research Ethics Committee
Strategic Plan
Historical Overview
Press Room (french only)
Work at the IRSST (french only)
Search
Contact us
|
Stay in touch
IRSST - Institut de recherche Robert-Sauvé en santé et en sécurité du travail
Contact us
Press Room
Careers
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
Organization Chart
Policies
Research Ethics Committee
Strategic Plan
Historical Overview
Press Room (french only)
Work at the IRSST (french only)
substance
Laboratory Services
>
Analysis and Testing Services
>
Workplace Air Contaminants
>
substance
August 27, 2025
Tungsten and compounds, in the absence of Cobalt (Pr)
French name in the regulation:
Tungstène et ses composés, en absence de Cobalt (Pr)
CAS :
7440-33-7
Exposure Standards in RROHS regulation
Permissible exposure values (PEV)
ppm
mg/m
3
f/cc
Notes
TWAEV
-
3
-
Pr
STEV
-
-
-
-
Ceiling
-
-
-
-
Carcinogenicity
Sensitizer
Simple asphyxiant
Percutaneous
Prohibited use
Prohibited recirculation
Minimum exposure
Explosion hazard
Ototoxic
TWA adjustment for unusual work schedules
Undetermined
CNESST – Toxicological Index Service
Consult REPTOX file:
Tungsten and compounds, in the absence of Cobalt(Pr)
Analysis:
Tungsten (respirable fraction) (as W)
Recommended method by the IRSST:
Method: NIOSH - 7300
Sampling protocol
Sampling device:
Mixed cellulose ester filter
Parameters:
Flow rate: 1,7 (Nylon) L/min
TWA sampling volume: 204 L
STEL sampling volume: -
Remarks:
A cyclone is required for sampling. This substance is not analyzed by our laboratories. It might be possible that the analysis is performed by another laboratory. Please contact the IRSST before sampling.
Analytical protocol
Principle:
Inductively coupled plasma-optical emission spectrometer (ICP-OES)
Reference
NIOSH Manual of Analytical Methods, 4th ed., Method 7300 : Elements (ICP), 2003.
×