Oki B8300n Limited Warranty - page 11
English
11
9. PHYSICAL AND CHEMICAL PROPERTIES
Appearance
Physical State:
Solid
Form:
Powder
Color:
Black
Odor:
Odorless
Chemical Properties
Ph:
Not applicable
Boiling/Melting Point:
Not applicable
Flash Point:
Not applicable
Explosion Properties:
No data
Density(g/cm³):
6 (bulk density = 2.35)
Solubility in water:
Negligible
10. STABILITY AND REACTIVITY
Stability:
Stable
Hazardous Reactions:
Dust explosion, like most finely divided organic powders.
Conditions to avoid:
Electric discharge, throwing into fire.
Materials to avoid:
Oxidizing materials
Hazardous Decomposition Products:
CO, CO
2
and NO
x
Further Information:
None
11. TOXICOLOGICAL INFORMATION
Acute Toxicity
Ingestion (oral):
LD
50
> 2000mg/kg (Rats)—estimated from constituent components
Inhalation:
LC
50
> 5.71mg/L
Eye irritation:
Not an irritant (Rabbits)
Skin irritation:
Not an irritant (Rabbits)
Skin sensitizer:
No sensitization
Mutagenicity:
Negative (Ames Test)
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 (16 mg/m
3
) exposure group, and a minimal to mild degree of fibrosis was noted in 22% of the animals in
the middle (4 mg/m
3
) exposure group, but no pulmonary change was reported in the lowest (1 mg/m
3
) exposure group, the most relevant
level to potential human exposures.
12. ECOLOGICAL INFORMATION
No data are available.