The ingredient name is often followed by the initials NF, indicating that it conforms to the specifications of the National Formulary.
According to the United States Pharmacopoeia - National Formulary (USP-NF), the ingredients for emulsifying wax NF are cetearyl alcohol and a polyoxyethylene derivative of a fatty acid ester of sorbitan (a polysorbate).
Over 35 animal and human studies were cited in the review; none showed more than minor irritation or reaction.
The safety assessment found that Emulsifying Wax NF was safe to use as a cosmetic ingredient at the then-present practices and concentrations of use.
The Cosmetic Ingredient Review Expert Panel revisited Emulsifying Wax NF in 2003.