Sodium Hyaluronate Crosspolymer

Sodium Hyaluronate Crosspolymer is a chemically cross-linked form of hyaluronic acid (sodium salt) where normal HA chains (1–2 million Da molecular weight) are bound together to create a large, mesh-like polymer structure. Its CAS number is 105524-32-1 and it is described by CosIng as functioning as a humectant and skin conditioning agent. The cross-linking technology was originally developed for dermal fillers, and this ingredient is the topical counterpart of the FDA-approved dermal filler Hylan B gel.