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September 29, 2026

Dibutyl phosphate (IFV) (See Remark)

French name in the regulation: Phosphate de dibutyle (IFV)

CAS : 107-66-4

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)

	ppm	mg/m³	f/cc	Notes
TWAEV	-	5	-	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

III : Weekly adjustment

CNESST – Toxicological Index Service

Consult REPTOX file: Dibutyl phosphate(IFV)

Analysis:

Phosphate de dibutyle

Recommended method by the IRSST:

Method: NIOSH - 5017

Sampling protocol

Sampling device: Polytetrafluoroethylene (teflon) filter
Parameters:
Flow rate: 1-3 L/min
TWA sampling volume: 250 L
STEL sampling volume: -
Remarks: The recommanded method is not suitable for Dibutyl phosphate vapor phase determination. 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)

Reference

NIOSH Manual of Analytical Methods, 4th ed., Method 5017 : Dibutyl Phosphate, 1994.