Overview
Hydroxyethyl Cellulose (HEC) is a non-ionic, water-soluble polymer derived from cellulose through chemical modification. It is widely used in various industries due to its ability to thicken, stabilize, and form films. HEC is prized for its compatibility with other ingredients and its stability across a wide pH range. As a versatile additive, HEC is essential in formulations requiring controlled viscosity and improved texture. Its non-toxic nature makes it suitable for use in personal care products, pharmaceuticals, and food applications, though its primary industrial use remains in coatings and construction materials.
Physical and Chemical Properties
HEC appears as a white to off-white powder with a density of approximately 0.55-0.75 g/cm³. It exhibits high solubility in water, forming clear, viscous solutions, but is insoluble in most organic solvents. The polymer does not melt but decomposes upon heating. Key chemical properties include its resistance to enzymatic degradation and stability under varying pH conditions (typically pH 2-12). The viscosity of HEC solutions can be tailored by adjusting the degree of hydroxyethyl substitution, making it adaptable for specific industrial needs.
Main Applications
HEC is extensively used in the coatings industry as a thickener and rheology modifier, improving paint application and preventing sagging. In cosmetics, it acts as a stabilizer in lotions, shampoos, and creams, enhancing texture and shelf life. The pharmaceutical industry utilizes HEC in tablet coatings and ophthalmic solutions due to its non-irritating properties. In construction, it is added to cement-based products to improve water retention and workability. Its versatility also extends to adhesives and textile printing.
Safety and Storage
HEC is generally recognized as safe for use in industrial and consumer products. However, dust inhalation should be avoided, and proper ventilation is recommended during handling. It is non-flammable and poses minimal environmental risk. For storage, keep HEC in a cool, dry place, sealed tightly to prevent moisture absorption. Bulk quantities should be stored on pallets in a well-ventilated area. Shelf life is typically 2-3 years when stored under optimal conditions.
B2B Procurement Guide
When procuring HEC, buyers should specify the required viscosity grade and degree of substitution to ensure compatibility with their applications. Reputable suppliers should provide certificates of analysis (CoA) detailing purity and performance characteristics. Prices vary based on quantity, grade, and supplier location. Bulk purchases (e.g., 25 kg bags or larger) often reduce costs. Buyers are advised to request samples for testing before large-scale procurement and to consider logistics, such as moisture-resistant packaging for long-distance shipping.
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