Threshold limit value-ceiling TLV

Threshold limit value-ceiling (TLV-C) The concentration that should not be exceeded during any part of the working exposure. 

Threshold Limit Value Ceiling (TLV-C) The concentration that RDA should not be e, cceded during any part of the working e. posure. If conventional industrial hygiene instantaneous monitoring is not feasible, then the TLV-C can be assessed by sampling over a 15-minute period except for those substances that may cause immediate irritation when exposures arc short. 

The 2003 ACGIH threshold limit value-ceiling (TLV-C) for thionyl chloride is 1 ppm (4.9mg/m ). 

Threshold limit value-ceiling (TLV-C) is the concentration that should not be exceeded even instantaneously. For some substances—for instance, irritant gases—only one category, the TLV-ceiling, may be relevant. For other substances, two or three categories may be relevant. 

Threshold limit value—ceiling (TLV—C) The concentration which should not be exceeded, even instantaneously. 

ACGIH recommends a Threshold Limit Value-Ceiling (TLV-C) of 1 ppm (2.8 mg/m ) for boron trifluoride. The TLV-C is the concentration that should not be exceeded during any part of the working exposure [2]. 

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