n-Pentane

CAS RN: 109-66-0

Threshold Limit Values

8 hr Time Weighted Avg (TWA): 1000 ppm. /Pentane, all isomers/
Excursion Limit Recommendation: Excursions in worker exposure levels may exceed 3 times the TLV-TWA for no more than a total of 30 minutes during a work day, and under no circumstances should they exceed 5 times the TLV-TWA, provided that the TLV-TWA is not exceeded. /Pentane, all isomers/
2013 Notice of Intended Changes (NIC): These substances, with their corresponding values and notations, comprise those for which (1) a limit is proposed for the first time, (2) a change in the Adopted value is proposed, (3) retention as an NIC is proposed, or (4) withdrawal of the Documentation and adopted TLV is proposed. In each case, the proposals should be considered trial values during the period they are on the NIC. These proposals were ratified by the ACGIH Board of Directors and will remain on the NIC for approximately one year following this ratification. If the Committee neither finds nor receives any substantive data that changes its scientific opinion regarding an NIC TLV, the Committee may then approve its recommendation to the ACGIH Board of Directors for adoption. If the Committee finds or receives substantive data that change its scientific opinion regarding an NIC TLV, the Committee may change its recommendation to the ACGIH Board of Directors for the matter to be either retained on or withdrawn from the NIC. Substance: Pentane, all isomers (78-78-4; 109-66-0; 463-82-1); Time Weighted Avg (TWA): 1000 ppm; Short Term Exposure Limit (STEL): None; Notations: None; Molecular Weight: 72.15; TLV Basis: Narcosis; Respiratory tract irritation. /Pentane, all isomers/
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