Polyquaternium-89 is a synthetic polymeric quaternary ammonium salt used as a film-forming cosmetic ingredient, particularly in hair-care and nail-care formulations. The current COSMILE Europe ingredient record identifies film forming as its cosmetic function and classifies the ingredient as synthetic. It is associated with hair-care and nail-care products.
Polyquaternium-89 is a chemically complex polymer prepared from several monomeric components, including t-butyl acrylate, vinylpyrrolidone, dimethylaminopropyl methacrylamide, methacrylic acid and a quaternized ammonium-containing methacrylate component. Available cosmetic ingredient references identify its CAS Number as 1015445-89-2 and CosIng Reference as 85406.
Its film-forming behavior makes Polyquaternium-89 relevant to cosmetic systems where a polymeric film is required on hair, nails or other cosmetic substrates. Polyquaternium polymers generally contain cationic ammonium functionality that can support interaction with hair surfaces.
Polyquaternium-89 belongs to the broad family of polymeric quaternary ammonium cosmetic ingredients. These polymers are chemically different from one another but contain quaternary ammonium functionality within their structures.
Polyquaternium-89 is described as a polymeric quaternary ammonium salt prepared through reaction of:
The exact polymer composition and physicochemical properties can vary according to the commercial grade and manufacturing process.
Film forming is the principal cosmetic function assigned to Polyquaternium-89 in the current CosIng-linked ingredient record.
A film-forming polymer can create a continuous polymeric layer on a cosmetic substrate. In hair-care products, this type of film can contribute to the physical characteristics of the hair surface and may support styling performance.
The resulting film depends on:
Therefore, actual performance should always be evaluated using the selected commercial grade.
COSMILE Europe identifies Polyquaternium-89 as occurring in hair-care products.
The polymeric film-forming property makes it relevant to hair formulations where a surface-depositing polymer is required.
Potential applications include:
Patent literature also identifies Polyquaternium-89 among polymers that can be used in hair-fixing compositions.
Polyquaternium-89 can be evaluated in styling systems where formation of a polymeric film is required.
When the formulation dries, the polymer can contribute to the deposited film on the hair surface. The final styling effect depends on the polymer grade and the complete formulation.
It can therefore be considered for:
The exact level should be determined through formulation development rather than assigning a universal use concentration.
Polyquaternium-89 has been identified in patent literature as a possible hair-fixing polymer in styling preparations.
A hair-fixing formulation can combine Polyquaternium-89 with other film-forming or rheology-modifying polymers depending on the desired hold, flexibility, sprayability and sensory characteristics.
Important formulation targets can include:
These performance characteristics are formulation-dependent and should not be considered inherent specifications of every Polyquaternium-89 grade.
COSMILE Europe identifies Polyquaternium-89 as an ingredient occurring in nail-care products as well as hair-care products.
Its film-forming capability can be evaluated in selected nail-care formulations where formation of a polymeric film is desired.
Potential applications can include:
Suitability depends on the finished formulation and the technical characteristics of the selected grade.
Available ingredient references describe Polyquaternium-89 in different commercial physical forms, including liquid and powder forms depending on the material. One ingredient reference describes a colourless to light-yellow liquid form that is water-soluble, while other materials may be supplied as powders.
Therefore, solubility and physical form should be treated as grade-specific.
The supplier TDS should be used to determine:
Polyquaternium-89 should be incorporated according to the processing recommendations of the selected commercial grade.
Important parameters include:
Controlled addition can help prevent polymer agglomeration and ensure uniform distribution.
The formulation pH should be established based on the complete formulation and supplier recommendations.
Because Polyquaternium-89 contains both acidic and cationic structural components, its behavior can depend on the surrounding formulation environment.
A universal pH range should not be assigned without grade-specific technical data.
Compatibility testing should be performed with:
Cationic polymers can interact strongly with anionic ingredients, potentially affecting clarity, viscosity, deposition and finished-product stability.
The performance of Polyquaternium-89 as a film former depends on the properties of the deposited polymer film.
Important development parameters can include:
Commercial ingredient descriptions characterize Polyquaternium-89 as a film-forming material, while the exact film properties remain grade- and formulation-dependent.
Polyquaternium-89 can be evaluated in:
Polyquaternium-89 is a synthetic polymeric quaternary ammonium salt used primarily as a film-forming cosmetic ingredient.
The INCI name is Polyquaternium-89.
The commonly reported CAS Number is 1015445-89-2.
The CosIng Reference is 85406.
Its current CosIng-listed function is film forming.
Yes. It is a polymeric quaternary ammonium salt containing cationic ammonium functionality.
Yes. COSMILE Europe identifies Polyquaternium-89 as occurring in hair-care products.
It can be used as a hair-fixing polymer in suitable formulations. Patent literature specifically identifies Polyquaternium-89 among polymers usable in hair-fixing preparations.
Yes. COSMILE Europe identifies both hair-care and nail-care products as areas of use.
Some commercial descriptions report water-soluble liquid forms, while other physical forms may be supplied as powders. Solubility should therefore be verified for the exact commercial grade.
No. It is a polymeric material with a complex composition, so a simple low-molecular-weight molecular formula should not be assigned.
No. Polyquaternium-89 and Quaternium-89 are different INCI ingredients. They should not share CAS numbers, functions or technical specifications without verification.
Yes. COSMILE Europe identifies its origin as synthetic.
| Parameter | Specification |
|---|---|
| Appearance | White to off-white powder |