Threshold limit value of the substances, indicated at item 8 of the Sayerlack Material Safety Data Sheet. It indicates the concentrations in p.p.m. (parts per million) or mg/m³ of the substances dispersed in the air at which most workers can be exposed repeatedly without negative effects on health: the higher the TLV, the more hazardous a substance.
TLV-TWA: threshold limit value – time weighted average.
TLV-STEL: threshold limit value – short time exposure limit.