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Several factors contribute to the pricing of hydroxyethyl cellulose per kilogram. These include raw material costs, production methods, geographical regions, and market demand.

The degree of substitution (DS) is another vital parameter used to categorize HPMC grades. It refers to the average number of hydroxyl groups in the cellulose molecule that are replaced by hydroxypropyl and methyl groups. A higher DS generally correlates with increased hydrophobicity and a reduction in solubility in cold water. Therefore, formulations requiring faster solubility may leverage lower DS grades, while those needing delayed release or thicker consistency might benefit from higher DS grades.

HPMC is derived from cellulose, a natural polymer found in plants. Through a series of chemical modification processes, cellulose is transformed into HPMC, which exhibits several essential characteristics water solubility, thickening, suspending, and film-forming capabilities. The structure of HPMC allows it to form a clear gel when mixed with water, making it an excellent additive for numerous applications.

2. Water Retention One of the standout features of HPMC is its superior water retention capability. In putty applications, this property prevents the mixture from drying out too quickly, thereby allowing for better leveling and adhesion to the substrate. This characteristic is particularly advantageous in hot or dry conditions, where traditional putty might dry too fast, leading to cracks and poor adhesion.

6. Biodegradability and Safety