What is the difference between hydroxypropyl methylcellulose (HPMC) without S?

What is the difference between hydroxypropyl methylcellulose (HPMC) without S? 1. HPMC is divided into fast-dissolving and slow-dissolving types. The HPMC instant solubility is suffix with the letter S, such as 100000S for 100,000 viscosity fast-dissolving HPMC, which is treat with glyoxal in the production process. The HPMC slowly soluble type does not contain any […]