Mercury [7439-97-6], mecury vapor (as Hg)

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.

Mercury [7439-97-6], mecury vapor (as Hg)

French name in the regulation: Mercure [7439-97-6], vapeur de mercure

CAS : 7439-97-6

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)

	ppm	mg/m³	f/cc	Notes
TWAEV	-	0,025	-	-
STEV	-	-	-	-
Ceiling	-	-	-	-

Carcinogenicity		Sensitizer
Simple asphyxiant		Percutaneous
Prohibited use		Prohibited recirculation
Minimum exposure		Explosion hazard
Ototoxic

TWA adjustment for unusual work schedules

III : Weekly adjustment

CNESST – Toxicological Index Service

Consult REPTOX file: Mercury [7439-97-6], mecury vapor (as Hg)

Analysis:

Mercure sur tube

Recommended method by the IRSST:

Method: NIOSH - 6009

Sampling protocol

Sampling device: Anasorb C300 or Hopcalite tube
Parameters:
Flow rate: 0,15-0,25 L/min
TWA sampling volume: 100 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: Cold vapour atomic absorption spectrophotometry (CV-AAS)
Remarks: Sampling on passive dosimeter is possible with a higher minimum reported value.

Reference

NIOSH Manual of Analytical Methods, 4th ed., Method 6009 : Mercury. Cincinnati, NIOSH, 1994.

Mercure avec ILD

Method: IRSST - 2-A

Sampling protocol

Sampling device:
Parameters:
Flow rate: -
TWA sampling volume: -
STEL sampling volume: -

Analytical protocol

Principle: Direct reading instrument-Amalgamation (DRI-Am)
Remarks: Refer to the user's guide that accompanies the instrument. The minimum reported value is 0.5µg/m³. The reference method corresponds to the calibration of the direct-reading instrument (DRI).

Reference

IRSST. "Étalonnage d'un instrument à lecture directe pour la mesure du mercure dans l'air" (méthode statique). Méthode 2-A. Méthodes d'étalonnage. Non publiée.