Wear Resistant Nail Lacquer, All About That Base 105

These describe what an ingredient is, not whether it is a problem. The stance marks above are the ratings; these are not.

• commonly dryingSD ALCOHOL 40-B, ISOPROPYL ALCOHOL

  • SD ALCOHOL 40-B: Denatured ethanol: a fast-evaporating solvent that thins a formula and leaves a dry finish. International Chemical Safety Card ICSC 0044, Ethanol (anhydrous), prepared by an international group of experts for the ILO and WHO: "The substance defats the skin, which may cause dryness or cracking." WHO Guidelines on Hand Hygiene in Health Care (2009) records depletion of the skin lipid barrier by lipid-dissolving alcohols, and also that "the lipid-dissolving effect of alcohols is inversely related to their concentration". Both describe stronger exposures than a cosmetic formula.
  • ISOPROPYL ALCOHOL: A fast-evaporating solvent with a drying finish, common in toners and hand products. International Chemical Safety Card ICSC 0554, Isopropyl alcohol, prepared by an international group of experts for the ILO and WHO: "Repeated or prolonged contact with skin may cause dryness and cracking." It describes a stronger exposure than a cosmetic formula.

• common irritantFormaldehyde

  • Formaldehyde: A preservative and a recognised contact allergen; the EU prohibits it in cosmetic products. American Contact Dermatitis Society, Allergen of the Year 2015: Pontén A, Bruze M, "Formaldehyde", Dermatitis 2015;26(1):3-6, DOI 10.1097/DER.0000000000000075, PMID 25581665; prohibited in cosmetics by EU Regulation (EC) 1223/2009 Annex II entry 1577, inserted by Commission Regulation (EU) 2019/831, which also deleted its Annex III and Annex V entries, so no nail-hardener use survives.

• rich occlusiveDIMETHICONE

  • DIMETHICONE: A silicone that forms a film on the surface of the skin without an oily feel. FDA OTC skin protectant monograph, 21 CFR 347.10(g), lists dimethicone as a skin protectant at 1 to 30%.