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US . ACGIH Threshold Limit Values <br /> Metals Type Value Percent Form <br /> CHROMIUM ( III ) AND COMPOUNDS TWA 0 . 5 mg/m3 22 - 32% (as Cr) <br /> COBALT METAL , DUST AND FUMES TWA 0 . 02 mg/m3 22 - 32% (as Co) <br /> Biological limit values No biological exposure limits noted for the ingredient(s ) . <br /> Appropriate engineering Use process enclosures , local exhaust ventilation , or other engineering controls to control airborne <br /> controls levels below recommended exposure limits . <br /> Individual protection measures , such as personal protective equipment <br /> Eye/face protection Safety glasses with side-shields . <br /> Skin protection <br /> Hand protection Rubber or plastic gloves . PVC disposable gloves . Use impervious gloves. <br /> Other Normal work clothing (long sleeved shirts and long pants ) is recommended . <br /> Respiratory protection Use a particulate filter respirator for particulate concentrations exceeding the Occupational <br /> Exposure Limit. MSHA/NIOSH respirators approved for dusts TC-21C or NIOSH approved <br /> cartridges for Non-oil aerosols , N95 , N991 N100 (42 CFR 84) . A respiratory protection program that <br /> meets OSHA's 29 CFR 1910 . 134 and ANSI Z88 . 2 requirements must be followed whenever work <br /> place conditions warrant a respirator's use . <br /> Thermal hazards Not applicable . <br /> General hygiene Use personal protective equipment as required . Handle in accordance with good industrial hygiene <br /> considerations and safety practice . <br /> 9 . Physical and chemical properties <br /> Appearance Powder. <br /> Physical state Solid . <br /> Form Powder. <br /> Color blue green <br /> Odor None . <br /> Odor threshold Not available . <br /> pH 8 (Shepherd Color Test Method 101 ) <br /> Melting point/freezing point Not applicable <br /> Not applicable . <br /> Initial boiling point and boiling Not applicable <br /> range <br /> Not applicable . <br /> Flash point Not applicable . <br /> Evaporation rate Not applicable <br /> Not applicable . <br /> Flammability (solid , gas) Not applicable . <br /> Upper/lower flammability or explosive limits <br /> Flammability limit - lower Not applicable . <br /> N <br /> Flammability limit - upper Not applicable . <br /> N <br /> Explosive limit - lower (%) Not available . <br /> Explosive limit - upper (%) Not available . <br /> Vapor pressure Not applicable <br /> Not applicable . <br /> Vapor density Not applicable <br /> Not applicable . <br /> Relative density Not available . <br /> Solubility(ies) <br /> Solubility (water) Negligible <br /> Negligible <br /> Material name: BLUE 211 sos us <br /> BL0211 Version #: 17 Revision date : 01 -08-2019 Issue date: 09-20-2013 3 / 6 <br /> i <br />