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- Cellulose, with its repeating unit of β-D-glucose linked by β-1,4-glycosidic bonds, is transformed into HEC through a chemical modification process known as etherification. This involves the substitution of some of the hydroxyl groups (-OH) on the cellulose chain with ethylene oxide (EO), which yields the hydroxyethyl group (-OCH2CH2OH). The extent of substitution, or the degree of hydroxyethylation, determines the properties of the final product.
- With ongoing research and technological advancements, the applications of HPMC are expected to expand even further. For instance, researchers are exploring the use of HPMC in the development of biodegradable plastics and eco-friendly coatings. Additionally, the increasing demand for natural and sustainable products is driving the development of HPMC-based products with improved functionality and performance.

European law allows for the use of HPMC capsules in the manufacture of organic product, where exceptions are not made for other shell materials. HPMC is not as cheap to buy as gelatin capsules, but is relatively inexpensive.
However, in general, higher viscosity results in better water retention. Therefore, many dry mortar manufacturers opt for medium viscosity cellulose (75,000-100,000) as a substitute for low-medium viscosity cellulose (20,000-40,000) to reduce the required dosage, considering cost factors.
HPMC
The Difference between Methyl Cellulose and HPMC

china hpmc.
Due to its water solubility, HPMC gel is often used in the formulation of sunscreen products to enhance their water resistance and overall performance.

