Why Should You Avoid 1,4-Dioxane in Cosmetics?

Most organisations categorize 1,4-dioxane as a suspected carcinogen and the presence of this contaminant in many products became a concern amongst the consumers. In recent years, stricter laws on the level of 1,4-dioxane has been imposed. Other than the regulations in ASEAN and EU, New York governor Andrew Cuomo also signed a bill prohibiting the sale of any household cleaning products, cosmetics, and personal care products that contain 1,4-dioxane above trace concentrations.

What is 1,4-Dioxane?

1,4-dioxane is a by-product formed through ethoxylation and is a contaminant found in many products especially in the home and personal care category. 1,4 dioxane is also known as dioxane, dioxan, p-dioxane, diethylene dioxide, diethylene oxide, diethylene ether and glycol ethylene ether.

What Should You Avoid in Your Labels?

  • Alcohol Exthoxylates/ Ethoxylated Alcohols (ingredients that end with “-eth”)
    Examples include Sodium Laureth Sulfate, C12-14 Pareth-11, Ceteareth.
  • Alcohol alkoxylates/ Alkoxylated alcohols 
  • Nonoxynols (ingredients that end with “-oxynol”
    Also known as nonaethylene glycol or polyethylene glycol nonyl phenyl ether.
  • Poloxamers (Polyoxyethylene, Polyoxypropylene block polymers)
    Example includes Poloxamer 181.
  • Polyethylene Glycol (PEG)
    Also known as Polyethylene Oxide (PEO) or Polyoxyethylene (POE). Example includes PEG-5 Cocoate.

1,4-dioxane has been classified as

  • EU: category 2 (suspected of causing cancer).
  • International Agency for Research on Cancer (IARC): Group 2B (possibly carcinogenic to humans)
  • US Environmental Protection Agency (US EPA): Group B2 (probable human carcinogen or likely to be carcinogenic to humans)
  • Occupational Safety and Health (NIOSH): Potential occupational carcinogen

Regulations of 1,4-Dioxane

Regulations of 1,4-Dioxane
Type of Product
New York
Limits (effective date: 19 June 2020)
Limits (effective date: 19 June 2023)
Limits (effective date: 1 January 2022)
Limits (effective date: 1 January 2023)
Limits (effective date: 2016)
Cosmetics
Personal Care
Household Cleaning Products
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