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MATERIAL SAFETY DATA SHEET

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138

Carcinogenicity :Carcinogenicity :

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.

ChrChr

Chr

onic Effonic Eff

onic Eff

ect :ect :

ect : 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

) exposure group, and

a minimal to mild degree of fibrosis was noted in 22% of the animals

in the middle (4mg/m

) exposure group, but no pulmonary change

was reported in the lowest (1mg/m

) exposure group, the most

relevant level to potential human exposures.

Signs and Symptoms of ExposureSigns and Symptoms of Exposure

Signs and Symptoms of Exposure

: Minimal irritation to respiratory tract may

occur as with exposure to any non-toxic

dust.

Medical Conditions GenerallMedical Conditions Generall

Medical Conditions Generall

y Agy Ag

y Ag

gragra

gra

ated bated b

ated b

y Exposure :y Exposure :

y Exposure : None

EmerEmer

Emer

encenc

enc

y and Firy and Fir

y and Fir

st Aid Prst Aid Pr

st Aid Pr

ocedures :ocedures :

ocedures :

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.Section 6.

Section 6.

PhPh

ysical Chemical Characteristicsysical Chemical Characteristics

ysical Chemical Characteristics

Boiling/Melting PBoiling/Melting P

Boiling/Melting P

ointoint

oint

: Not applicable

Specific GraSpecific Gra

Specific Gra

vityvity

vity

: 1.1

apor Pressureapor Pressure

apor Pressure

: Not applicable

Solubility in Solubility in

Solubility in

aterater

ater

: Negligible

apor Densityapor Density

apor Density

: Not applicable

PHPH

: Not applicable

EvEv

aporation Rateaporation Rate

aporation Rate

: Not applicable

ViscosityViscosity

Viscosity

: Not applicable

AppearanceAppearance

Appearance

: Fine powder

ColorColor

Color

: Black

OdorOdor

Odor

: Odorless

Section 7.Section 7.

Section 7.

Fire and Explosion DataFire and Explosion Data

Fire and Explosion Data

Flash PFlash P

Flash P

oint (Method Used)oint (Method Used)

oint (Method Used)

: Not applicable

Ignition Ignition

Ignition

emperatureemperature

emperature

: No data available

FlammabFlammab

Flammab

le Limitsle Limits

le Limits

: (LEL); Not applicable

(UEL); Not applicable

Extinguishing MediaExtinguishing Media

Extinguishing Media

: CO

, dry chemical, foam or water

Special Fire Fighting ProcedureSpecial Fire Fighting Procedure

Special Fire Fighting Procedure

: None

Unusual Fire and Explosion Hazard :Unusual Fire and Explosion Hazard :

Unusual Fire and Explosion Hazard :

This material has no unusual fire or

explosion hazards.

Sensitivity to Mechanical ImpactSensitivity to Mechanical Impact

Sensitivity to Mechanical Impact

: None

Sensitivity to Static ChargeSensitivity to Static Charge

Sensitivity to Static Charge

: None

SUK SAFETY DATA SHEET LEO.p65 19/06/00, 11:53138