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December 04, 2024

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.

n-Hexane  

French name in the regulation: Hexane normal
CAS : 110-54-3

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)
ppm mg/m3 f/cc Notes
TWAEV 50 176 - -
STEV - - - -
Ceiling - - - -
Carcinogenicity Sensitizer
Simple asphyxiantPercutaneous
Prohibited useProhibited recirculation
Minimum exposureExplosion hazard
Ototoxic

TWA adjustment for unusual work schedules

IV : Daily or weekly adjustment ( the more stringent of the two)

CNESST – Toxicological Index Service

Consult REPTOX file: n-Hexane

Analysis:

Hexane normal

Method: IRSST - 141-2

Sampling protocol

Sampling device:
Sampling media required:
#IRSSTDescription
2120 Activated charcoal tube 100/50 mg

Parameters:
Flow rate: Max: 0,2 L/min
TWA sampling volume: 4 L
STEL sampling volume: -

Principle: Gas chromatography with flame ionization detection (GC-FID)
Precision (%): 3,1
Minimum reported value: 15 µg
Remarks: The analysis can be done by gas chromatography coupled with mass spectrometry (GC-MS, IRSST method #369); in this case the analytical uncertainty (CVa) is 7.8%.

IRSST. "Analyse du n-hexane dans l'air". Méthode 141-2. Méthodes analytiques. Montréal: IRSST, 1995.

n-Hexane

Method: IRSST - 416

Sampling protocol

Sampling device:
Sampling media required:
#IRSSTDescription
2696 566AT passive dosimeter

Parameters:
Flow rate: 0,00988 L/min
TWA sampling volume: -
STEL sampling volume: -
Remarks: For the monitors, the flow must be considered as being a sampling rate.

Principle: Gas chromatography with flame ionization detection (GC-FID)
Precision (%): 3,2
Minimum reported value: 8 µg

IRSST. "Dosage des composés organiques volatils dans l'air par dosimétrie passive". Méthode 416. Non publiée.