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  Mercury, Alkyl Compounds Mercury, Aryl Compounds Mercury, Inorganic Compounds
OSHA      
     8-Hour TWA 0.01 mg/m3 0.1 mg/m3 0.1 mg/m3
     Ceiling 0.04 mg/m3 - -
NIOSH      
     8-Hour TWA 0.01 mg/m3, Skin 0.05 mg/m3, Skin 0.05 mg/m3, Skin
     ST/Ceiling 0.03 mg/m3, (ST) Skin 0.1 mg/m3, (Ceiling) Skin 0.1 mg/m3, (Ceiling) Skin
     IDLH 2 mg/m3 10 mg/m3 10 mg/m3
ACGIH      
     8-Hour TWA 0.01 mg/m3, Skin 0.1 mg/m3, Skin 0.025 mg/m3, Skin
     Short Term 0.03 mg/m3, Skin - -