IRSST - Institut de recherche Robert-Sauvé en santé et en sécurité du travail

Rhodium [7440-16-6], Soluble compounds (as Rh)

French name in the regulation: Rhodium, Composés solubles
CAS : 7440-16-6

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)
ppm mg/m3 f/cc Notes
TWAEV - 0,001 - -
STEV - - - -
Ceiling - - - -
Simple asphyxiant Percutaneous
Minimum exposure Sensitizer
Prohibited use Prohibited recirculation

TWA adjustment for unusual work schedules

III : Weekly adjustment

CNESST – Toxicological Index Service


Rhodium, Composés solubles (exprimé en Rh)

Recommended method by the IRSST:
Method: ASTM - D7439-08
Sampling device: Mixed cellulose ester filter
Flow rate: 1-5 L/min
TWA sampling volume: 480 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.
Principle: Inductively coupled plasma spectrometry (ICP-MS)
ASTM, Determination of elements in airborne particulate matter by inductively coupled plasma-mass spectrometry, 2008.
Following the amendment of Appendix 1 of the Quebec Regulation respecting occupational health and safety (RSST, RLRQ, c. S-2.1, r. 13), part of Quebec Occupational Health and Safety Act, which came into effect on March 26, 2020, the TWAEV, STEL and Ceiling values for certain substances are now expressed in ppm. For these substances, the IRSST performed the conversion calculations to express these TWAEV, TWA and Ceiling values in mg/m3, which thus appears in its Sampling Guide for Air Contaminants in the Workplace (Guide d'échantillonnage des contaminants de l'air en milieu de travail ) and the associated Substance Data Sheets. However, it is imperative to refer to the values expressed in the RSST which are legally binding.