Table 10.

Occupational exposure limit values (OELs) for nanomaterial handling.

Description	Benchmark Exposure Level
Fibrous, a high aspect ratio insoluble nanomaterials	0.01 fibers/mL
Any nanomaterial that is already classified in its molecular or in its larger particle form a as carcinogenic, mutagenic, reproductive, and sensitizing (CMRS) toxin	0.1 × OEL
Insoluble or poorly soluble nanomaterials not in the fibrous or CMRS categories	0.066 × OEL
Soluble nanomaterials not in the fibrous or CMRS categories	0.5 × OEL