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September 04, 2025

Carbon black (Pi)

French name in the regulation: Noir de carbone (Pi)

CAS : 1333-86-4

Synonyms: Carbone noir

Exposure Standards in RROHS regulation

Permissible exposure values (PEV)

	ppm	mg/m³	f/cc	Notes
TWAEV	-	3	-	Pi
STEV	-	-	-	-
Ceiling	-	-	-	-

Carcinogenicity	C3	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: Carbon black(Pi)

Analysis:

Weight measurement for inhalable dusts

Method: IRSST - 373

Sampling protocol

Sampling device:
Sampling media required:

#IRSST	Description
922	Cassette and PVC filter prew. 25 mm, 5 µm, disposable inhalable

Parameters:
Flow rate: 2,0 L/min
TWA sampling volume: 400 L
STEL sampling volume: -

Principle: Gravimetric measurement (Grav)
Precision (%): 2,3
Minimum reported value: 60 µg
Remarks: Additional information is available in Info-Labo 1991-03 and in Info-Labo 2019-06. The weight measurement method for dusts is by definition non-specific.

Reference

IRSST. "Détermination des poussières de fraction inhalable dans l'air", Méthodes analytiques, / MA-373, Montréal, IRSST, 2015, 9 pages.