Overview
Hydroxyethyl Starch Ether (HES) is a modified starch derivative created by introducing hydroxyethyl groups into the starch molecule. This modification enhances its solubility and stability, making it suitable for various industrial and medical applications. HES is commonly used as a plasma volume expander in medical settings due to its ability to retain water and mimic the properties of natural colloids. In addition to its medical uses, HES serves as a thickening and stabilizing agent in the food industry. Its biocompatibility and non-toxic nature make it a preferred choice for applications requiring safe and effective water retention.
Physical and Chemical Properties
Hydroxyethyl Starch Ether appears as a white to off-white powder with a density of approximately 1.5 g/cm³. It is highly soluble in water but insoluble in most organic solvents. The polymer does not melt but decomposes when heated, making it stable under typical storage conditions. Key chemical properties include its high water retention capacity and viscosity, which can be adjusted based on the degree of hydroxyethyl substitution. These properties make HES versatile for applications ranging from pharmaceuticals to industrial adhesives.
Main Applications
The primary application of Hydroxyethyl Starch Ether is in the medical field, where it is used as a plasma volume expander. It helps maintain blood volume in patients undergoing surgery or suffering from severe blood loss. HES is also used in intravenous therapies to improve circulation. In the food industry, HES acts as a stabilizer and thickener in products like sauces, dressings, and dairy items. Its industrial uses include adhesives, paper coatings, and textile sizing, where its water-retention properties are highly valued.
Safety and Storage
Hydroxyethyl Starch Ether is generally considered safe for use in medical and food applications. However, it may cause allergic reactions in sensitive individuals, particularly when used intravenously. Proper handling and storage are essential to maintain its quality. Store HES in a cool, dry place away from moisture and direct sunlight. Ensure containers are tightly sealed to prevent contamination. Follow regulatory guidelines for disposal and handling to minimize environmental impact.
B2B Procurement Guide
When procuring Hydroxyethyl Starch Ether, verify the CAS number (9005-27-0) and purity specifications to ensure product quality. Consider the intended application—medical-grade HES requires higher purity standards than industrial-grade products. Suppliers should provide detailed technical data sheets, including solubility, viscosity, and substitution degree. Price varies based on purity and quantity, with bulk purchases typically offering cost savings. Always source from reputable manufacturers to guarantee compliance with industry standards.
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