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Ingredient directory

Ammonium Trideceth-6 Phosphate

Ammonium Trideceth-6 Phosphate is an anionic surfactant and emulsifier, vital for stabilizing oil and water phases in cosmetic formulations. It is particularly effective in high-pigment systems like makeup and sunscreens.

Directory entry · Individual source review pending

This profile is awaiting an individual source review. Treat its ratings, dose estimates and compatibility labels as provisional; they are not medical advice or proof of a finished product’s effects.

emulsifying surfactant cleansing

Science

This ingredient functions by lowering the interfacial tension, enabling the creation of stable emulsions. Its anionic phosphate group provides specific stabilization, while the ethoxylated fatty alcohol part balances hydrophilic and lipophilic properties.


Research

Low confidence
Effective range N/A
Optimal

N/A


Transparency

Not commonly dusted

As an emulsifier and surfactant, this ingredient is not typically used in concentrations that would lead to 'dusting' issues associated with active ingredients.


The Formula

Solubility
Water
Optimal pH 5.5 – 8.5
0 7 14

Stability

Highly stable in emulsions and effective in stabilizing high-load pigment systems. It often co-formulates with pH adjusters like Ammonium Hydroxide or Triethanolamine.

Conflicts

  • Cationic surfactants
  • Strongly acidic conditions (may destabilize the phosphate salt)

Safety

CIR Status
Safe as used
Sensitization risk Low

The CIR Expert Panel concluded this ingredient is safe when formulated to be non-irritating. As an ethoxylated compound, controlling 1,4-dioxane, a manufacturing byproduct, is crucial.


Your Skin

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Unknown
Comedogenicity Unknown

Our Assessment

Valuable

Ammonium Trideceth-6 Phosphate is a valuable formulation aid, primarily as an emulsifier for stable and well-dispersed cosmetic products, with a good safety profile.


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