How to use cellulose thickener in hand sanitizer and how to choose?

How to use cellulose in hand sanitizer and how to choose?
For transparent hand sanitizer, HEC is recommended, but it is necessary to test the combination of active system and HEC. If the system is not compounded, a small amount of colloid can be directly observed to settle at the bottom of the cup; if it is opaque hand sanitizer, HPMC (HD) is recommended, However, it is also necessary to perform a combination test of surface activity and HPMC. In addition, HPMC also has an advantage: it can resist irritation and improve the mildness of hand sanitizer.