it in, skin contact, and eye contact. The National Institute for Occupational Safety and Health (NIOSH) has set a recommended exposure limit (REL) for paraffin wax fume exposure of 2 mg/m3 over an 8-hour workday. See also Oligomer Ozokerite References External links "Odd Uses of Paraffin", Scientific American, 13 July 1878, p. 19 Waxes Alkanes Petroleum products Food additives E-number additives