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September 18, 2026

Fenthion (IFV) (See Remark)

French name in the regulation: Fenthion (IFV)

CAS : 55-38-9

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)

	ppm	mg/m³	f/cc	Notes
TWAEV	-	0,05	-	IFV
STEV	-	-	-	-
Ceiling	-	-	-	-

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

Remark :	The TWA exposure value adjustment code for unusual work schedules was revised in 2026.

TWA adjustment for unusual work schedules

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

CNESST – Toxicological Index Service

Consult REPTOX file: Fenthion(IFV)

Analysis:

Fenthion

Recommended method by the IRSST:

Method: NIOSH - 5600

Sampling protocol

Sampling device: OVS-2 tube with XAD-2 and glass fiber filter
Parameters:
Flow rate: 0,2-1 L/min
TWA sampling volume: 240 L
STEL sampling volume: -
Remarks: The recommanded method for Fenthion is suitable for both vapor and aerosol phases. The aerosol phase might be underestimated because the efficiency of the sampling device does not match inhalable fraction definition. For more information, please contact the IRSST. 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: Gas chromatography with flame photometric detection (GC-FPD)
Remarks: Some phosphates may cause interferences during the analysis.

Reference

NIOSH Manual of Analytical Methods, 4th ed, Method 5600: Organophosphorus pesticides, 1994.