Polyquaternium-100 is a copolymer, organic quaternary ammonium compound containing Trimonium consisting of acrylamide monomers and dimethyl diallyl ammonium chloride.
The number is a chronological reference of the registration date of this ingredient.
It occurs as a colourless to light yellow liquid, soluble in water, insoluble in ester, hydrocarbons and ketone.

What it is used for and where
Cosmetics
Antistatic agent. Static electricity build-up has a direct influence on products and causes electrostatic adsorption. The antistatic ingredient reduces static build-up and surface resistivity on the surface of the skin and hair.