Oki B8300n Limited Warranty - page 8
8
English
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
Softening Point:
100-130°C
Flash Point:
Not applicable
lgnition Point:
>350°C
Explosion Properties:
No data
Density(g/cm³):
1.1 (bulk density = 0.4)
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
> 2500 mg/kg (Rats
)
Inhalation:
LC
50
> 5.71 mg/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 in22% 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.