Molybdenum, Metal [7439-98-7] and insoluble compounds (Pi)

According to Decree 280-2024 published on February 28, 2024, in the Gazette officielle du Québec, the amendment to the Appendix 1 of the Regulation respecting occupational health and safety (RSST, RLRQ, c. S-2.1, r. 13) will come into force on March 14, 2024. These regulatory changes have not yet been incorporated into the current Substance Data Sheets of the Sampling Guide for Air Contaminants in the Workplace. An update is currently underway and will be available as soon as possible. Consequently, the information contained in the data sheets of substances modified or added in Decree 280-2024 is partially inaccurate or incomplete. Please consult our infoLABO (in French only) for more details. Please contact our client service: [email protected] for further information.

Molybdenum, Metal [7439-98-7] and insoluble compounds (Pi)

French name in the regulation: Molybdène, métal [7439-98-7] et composés insolubles (Pi)

CAS : 7439-98-7

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)

	ppm	mg/m³	f/cc	Notes
TWAEV	-	10	-	Pi
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: Molybdenum, Metal [7439-98-7] and insoluble compounds(Pi)

Analysis:

Molybdène fraction inhalable (exprimé en Mo), métal et composés insolubles

Recommended method by the IRSST:

Method: OSHA - ID125G

Sampling protocol

Sampling device: Plastic IOM, MEC filter, 0.8 µm, 25 mm
Parameters:
Flow rate: 2 L/min
TWA sampling volume: 180 L
STEL sampling volume: -
Remarks: This substance is not analyzed by our laboratories. It might be possible that the analysis be performed by another laboratory. Please contact the IRSST before sampling.

Analytical protocol

Principle: Inductively coupled plasma-optical emission spectrometer (ICP-OES)
Remarks: This method allows the analysis of chemical elements present in the sample without distinguishing the different chemical forms. The analytical results are expressed as molybdenum, inhalable fraction.

Reference

OSHA Analytical Methods Manual, Method ID125G.: Metal particulates in workplace atmospheres (ICP analysis), 2002.