Threshold Limit Values skin notation

The ACGIH threshold limit value (TLV), time-weighted average for an 8 hour workday, 40 hour workweek, was set at 50 ppm (- 200 mg/m ) with a notation for skin absorption (29). 

ACGIH TLV American Conference of Governmental Industrial Hygienists recommended Threshold Limit Values based on a time-weighted average exposure over an 8-h period and 40-h work week. A [Skin] notation indicates that percutaneous absorption of the material is a potential hazard and may contribute to the overall exposure. 

The 2003 ACGIH threshold limit value-time-weighted average (TLV-TWA) for acrylamide is 0.03 mg/m with a notation for skin absorption and an A3, confirmed animal carcinogen with unknown relevance to humans designation. 

ACGIH has designated 4-aminodiphenyl as an A1 human carcinogen with no assigned threshold limit value and a notation for skin absorption. 

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 ACGIH ceiling-threshold limit value (C-TLV) for cyanide salts, as CN, is 5 mg/m with a notation for skin absorption. 

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