There are differences in properties, usage and solubility between Hydroxyethyl Cellulose(HEC) and Hydroxypropyl Methyl Cellulose(HPMC) .

1.Properties:

HEC is a white or light yellow, tasteless, non-toxic fibrous or powdered solid, But HPMC is a white or white-like fibrous or granular powder, belonging to a variety of nonionic cellulose mixed ethers, is a semi-synthetic, inactive, viscoelastic polymer.

2.Usage: 

HEC is widely used in medicine, daily chemical industry, petroleum, textile and other fields. HPMC is mainly used in construction, petroleum, pharmaceutical, food processing and other fields.

3.Solubility: 

HEC is easily soluble in water, and has the properties of thickening, leveling, dispersion, suspension, etc. However, the solubility of HPMC varies with the degree of polymerization and substitution. Generally speaking, It is partially soluble in cold water and completely soluble in hot water.

In conclusion, although they're all cellulose ether,  HEC and HPMC have significant differences in properties, applications and solubility. Welcome to consult us for more information about cellulose ether.