MeSH Browser

MeSH Heading: Threshold Limit Values
Tree Number(s): N03.706.615.917; N06.850.460.350.600.807
Unique ID: D020711
RDF Unique Identifier: http://id.nlm.nih.gov/mesh/D020711
Scope Note: Standards for limiting worker exposure to airborne contaminants. They are the maximum concentration in air at which it is believed that a particular substance will not produce adverse health effects with repeated daily exposure. It can be a time-weighted average (TLV-TWA), a short-term value (TLV-STEL), or an instantaneous value (TLV-Ceiling). They are expressed either as parts per million (ppm) or milligram per cubic meter (mg/m3).
Entry Term(s): STEL; Short-Term Exposure Limit; TLV-BLV; TLV-Biological Limit Value; TLV-Ceiling; TLV-STEL; TLV-TWA; TLV-Time Weighted Average
NLM Classification #: WA 450
See Also: Maximum Allowable Concentration
Public MeSH Note: 2000; see MAXIMUM PERMISSIBLE EXPOSURE LEVEL 1976-1999; for TLV see MAXIMUM PERMISSIBLE EXPOSURE LEVEL 1976-1999
History Note: 2000; use MAXIMUM ALLOWABLE CONCENTRATION 1976-1999; for TLV use MAXIMUM ALLOWABLE CONCENTRATION 1976-1999
Date Established: 2000/01/01
Date of Entry: 1999/11/09
Revision Date: 2008/07/08

Threshold Limit Values MeSH Descriptor Data 2025