Hydroxypropyl methylcellulose acetate succinate (HPMCAS)

HPMCAS is an enteric material that can be used as enteric coating material, microcapsule capsule membrane material, and sustained-release material, such as the preparation of sustained-release granules, tablets, capsules, and even microcapsules, and when used as sustained-controlled release agent, the release rate is pH-dependent.
Advantages: Compared with other enteric materials, HPMCAS has more stable storage conditions, dissolves faster in the intestine, and is not easy to react with the coating materials.

White or light yellow powder or granule