Polyquaternium-102 is a chemical compound, copolymer, the polymeric quaternary ammonium salt formed from acrylamide, sodium acryloyldimethyl taurate and phosphorylcholine methacrylate
The number is a chronological reference of the registration date of this ingredient.
It occurs as a colourless to light yellow liquid or white powder, soluble in water, insoluble in ester, hydrocarbons and ketone.

What it is used for and where
Cosmetics
Emulsion stabilizer. Emulsions are thermodynamically unstable. Emulsion stabilisers improve the formation and stability of single and double emulsions. It should be noted that in the structure-function relationship, molar mass plays an important role.
Opacifying agent. This additive is inserted into formulations that may be translucent or transparent to make them opaque and less permeable to light.
Viscosity control agent. It controls and adapts viscosity to the required level for optimal chemical and physical stability of the product and dosage in gels, suspensions, emulsions, solutions.