The American Conference of Governmental Industrial Hygienists (ACGIH®) Threshold Limit Values for Chemical Substances (TLV®-CS) Committee has included carbon nanotubes on its 2019 list of chemical substances and other issues under study. Being placed on the under study list indicates that the TLV®-CS Committee has selected carbon nanotubes for development of a threshold limit value (TLV®). ACGIH® describes TLVs® as health-based values representing the opinion of the scientific community that exposure at or below the level of the TLV® does not create an unreasonable risk of disease or injury. The TLV®-CS Committee seeks substantive data and comments, and will consider only those addressing issues of health and exposure, not economic or technical feasibility. ACGIH® will update the under study list into a two-tier list by July 31, 2019: Tier 1 entries indicate the chemical substances and physical agents that may move…
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