Sodium Hyaluronate Crosspolymer is hyaluronic acid that has been chemically cross-linked to create a three-dimensional polymer network that resists enzymatic degradation. This cross-linking extends the moisture-binding duration from hours (linear HA) to 24+ hours. Forms a breathable, hydrating film on skin that provides sustained moisture release. Combines the instant hydration of low-MW HA with the longevity of high-MW HA in one ingredient.
Key Skin Benefits
+ Cross-linked HA — resists enzymatic degradation
+ Sustained moisture release for 24+ hours
+ Forms breathable hydrating film on skin
+ Combines instant + sustained hydration
+ Longer-lasting than linear hyaluronic acid
Pros
+ + 24-hour sustained hydration
+ + Resists breakdown by hyaluronidase
+ + Forms protective moisture film
+ + Combines fast + slow release
+ + Non-sticky feel unlike some HA
Cons
− − More expensive than standard HA
− − Synthetic cross-linking — less natural
− − May pill with certain formulations
− − Higher MW — may not penetrate deeply
Specifications
Property
Value
Usage Areas
Face, Eye, Body
Product Type
Leave-On, Rinse-Off
Source
Synthetic (cross-linked HA)
Natural Level
Semi-synthetic
Safety Ratings
Metric
Rating
Skin Sensitivity
1/5
Comedogenic Rating
0/5
EWG Score
1/10
Regional Regulatory Limits
Region
Leave-on %
Rinse-off %
Status
EU (CosIng)
No limit
No limit
Allowed
US (CIR/FDA)
No limit
No limit
Allowed
Japan (MHLW)
No limit
No limit
Allowed
ASEAN
No limit
No limit
Allowed
China (NMPA)
No limit
No limit
Allowed
Typical Usage % by Product Type
Product Type
Typical %
Serum
0.1 - 1%
Moisturizer
0.05 - 0.5%
References
Necas J et al. — Hyaluronic acid review. Vet Med (2008)
Price RD et al. — HA in tissue engineering. J Cell Mol Med (2005). PMID: 15784125