Carcinogen designation

Recommendations by the ACGIH are classified as threshold limit values (TLV) based on 8-h TWA. Chromium metal and alloys, Cr(II) compounds and Cr(III) compounds, including chromite ore, have a TLV of 0.5 mg/m Cr in air. Water-soluble Cr(VI) compounds have a TLV of 0.05 mg/m Cr. Certain water-insoluble Cr(VI) compounds, ie, the chromates of 2inc, barium, calcium, lead, strontium, sintered chromic acid, and processing chromite ores, also have a TLV of 0.05 mg/m as well as a human carcinogen designation (145). 

The 2003 ACGIH ceiling threshold limit value (C-TLV) for acetaldehyde is 2 5 ppm (45mg/m ) with an A3-animal carcinogen designation. 

The 2003 ACGIH threshold limit value-time-weighted average (TLV-TWA) for ammonium perfluorooctanoate is 0.01 mg/m with an A3 animal carcinogen designation and a notation for skin absorption. 

J,m in length, with an aspect ratio of >3 1) there is an A1 confirmed human carcinogen designation. 

The ACGIH has established a ceiling threshold limit value (TLV-C) of 0.1 ppm (0.8mg/m ) for occupational exposure to benzotrichloride with a skin notation and an A2 suspected human carcinogen designation. 

The 2003 ACGIFI threshold limit valuetime-weighted average (TLV-TWA) for beryllium, and compounds as Be, is 0.002 mg/m with an A2-suspected human carcinogen designation. 

The 2003 ACGIH threshold limit valueceiling (TLV-C) is 0.3 ppm (0.37 mg/m ) with a notation for sensitization and an A2-suspected human carcinogen designation. 

O.lmg/m as Hg there is a notation for skin absorption and an A4-not classifiable as a human carcinogen designation. 

The 2003 short-term excursion limit (STEL)/ceiling limit for methyl hydrazine is 0.2 ppm (0.38 mg/m ) with a notation for skin and an A3-confirmed animal carcinogen designation. 

---