Nickel oxide: NiO (colorant)

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hazard description- toxic, may cause cancer by inhalation, may cause sensitization by skin contact

physical properties- dark green odorless powder

acute effects- irritant to skin, mucous membranes, & eyes

sensitization possible through skin contact, may cause form of dermatitis called nickel itch 

symptoms of overexposure-intestinal disorders, convulsions asphyxia 

caution- airborne nickel contaminated dusts regarded as carcinogenic to respiratory tract

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