Technical data

License Agreements
MATERIAL SAFETY DATA SHEET
138
Carcinogenicity : In 1996 the IARC reevaluated carbon black as a Group 2B carcinogen
(possible human carcinogen). This classification is given to chemicals
for which there is inadequate human evidence, but sufficient animal
evidence on which to base an opinion of carcinogenicity. The
classification is based upon the development of lung tumors in rats
receiving chronic inhalation exposures to free carbon black at levels
that induce particle overload of the lung. Studies performed in animal
models other than rats did not show any association between carbon
black and lung tumors. Moreover, a two-year cancer bioassay using
a typical toner preparation containing carbon black demonstrated
no association between toner exposure and tumor development in
rats.
Chronic Effect : In a study in rats of chronic inhalation exposure to a typical toner,
a mild to moderate degree of lung fibrosis was observed in 92% of
the rats in the high concentration (16mg/m
3
) exposure group, and
a minimal to mild degree of fibrosis was noted in 22% of the animals
in the middle (4mg/m
3
) exposure group, but no pulmonary change
was reported in the lowest (1mg/m
3
) exposure group, the most
relevant level to potential human exposures.
Signs and Symptoms of Exposure : Minimal irritation to respiratory tract may
occur as with exposure to any non-toxic
dust.
Medical Conditions Generally Aggravated by Exposure : None
Emergency and First Aid Procedures :
Inhalation ; Remove to fresh air. If effects occur, consult medical personnel.
Eye ; In case of contact, immediately flush eyes with water for 15 minutes.
Section 6. Physical Chemical Characteristics
Boiling/Melting Point : Not applicable Specific Gravity : 1.1
Vapor Pressure : Not applicable Solubility in Water : Negligible
Vapor Density : Not applicable PH : Not applicable
Evaporation Rate : Not applicable Viscosity : Not applicable
Appearance : Fine powder Color : Black
Odor : Odorless
Section 5. Health Hazard Data
Route(s) of Entry : Inhalation? Skin? Ingestion?
Yes No Possible but very unusual.
Health Hazards : Acute oral toxicity—LD50 of this toner is over 2,000mg/kg.
Mutagenicity—The result of Ames test is negative.
SUK SAFETY DATA SHEET LEO.p65 30/03/00, 16:23138