Chromium VI, water insoluble inorganic compounds

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.

Chromium VI, water insoluble inorganic compounds

French name in the regulation: Chrome VI, composés inorganiques hydro-insolubles

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)

	ppm	mg/m³	f/cc	Notes
TWAEV	-	0,001	-	-
STEV	-	-	-	-
Ceiling	-	-	-	-

Carcinogenicity	C1	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: Chromium VI, water insoluble inorganic compounds

Analysis:

Chrome VI hydro insolubles

Method: IRSST - 365

Sampling protocol

Sampling device:
Sampling media required:

#IRSST	Description
976	25mm quartz filter in a conical cassette

Parameters:
Flow rate: 1.5 to 4 L/min
TWA sampling volume: 360 L
STEL sampling volume: -

Analytical protocol

Principle: Ion chromatography with visible detection (IC-VIS)
Precision (%): 3,6
Minimum reported value: 0,04 µg
Remarks: The analytical results are expressed as total water-insoluble chromium VI. Surface tests for chromates can be carried out, and the required equipment (kit #2625) is available at the IRSST. Extraction delay of 8 days for welding fumes and 10 days for the other processes following the sampling date. Ship all samples by rapid courier within a period not exceeding 24 hours after sampling. Any substance that produces a response on the detector at 540 nm and that has a retention time similar to Cr VI is a potential interference.

Reference

IRSST. Détermination des composés inorganiques du chrome hexavalent hydrosolubles et hydroinsolubles dans l'air des lieux de travail, Méthodes analytiques, méthode 365, Montréal, IRSST, 2009, 17 pages.