Hydroxyethyl Cellulose CAS 9004-62-0, Hydroxyethyl Cellulose, CAS 9004-62-0
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Hydroxyethyl cellulose (CAS 9004-62-0) is a nonionic water-soluble polymer, and its core properties include:Versatility: Thickening, emulsifying and water retention properties cover ten major fields including petroleum, medicine and building materials.
9004-62-0
C29H52O21
0
618-387-5
| CAS | 9004-62-0 |
| Molecular formula | C29H52O21 |
| Molecular weight | 0 |
| EIENCS | 618-387-5 |
| Form | powder |
| Melting point | 288-290 °C (dec.) |
| boling point | / |
| Density | 0.75 g/mL at 25 °C(lit.) |
| Solubility | H2O: ≤5 wt. % at 20 °C |
| PKA | / |
| Color | Light brown powder |
| Storage temp |
Hydroxyethyl cellulose (CAS 9004-62-0) is a nonionic water-soluble polymer, and its core properties include:
Versatility: Thickening, emulsifying and water retention properties cover ten major fields including petroleum, medicine and building materials.
The process is mature: alkali catalytic etherification is the main method, and the consumption of ethylene oxide reaches 900 kg per ton of product.
Safe and low-toxicity: Dust inhalation and solution mold growth should be prevented. Long-term storage should be controlled by temperature and humidity.
Market classification: Industrial grade offers high cost performance (¥80/kg), while pharmaceutical/food grade has strict purity requirements (> ¥7/g).
Mainstream method
Alkali catalytic etherification
Raw materials: Cotton ligation or refined pulp → Soak in 30% liquid alkali → Press to an alkali-water ratio of 1:2.8 → Crush.
Reaction: Alkali cellulose + ethylene oxide (25℃, 2h) → Crude product → alcohol washing → Acetic acid neutralization (pH 4-6) → glyoxal cross-linking and aging → water washing and drying.
Alternative process:
Gas-phase method: Alkali fibers react with ethylene oxide in a vacuum at 27-32 ℃ for 3-3.5 hours.
Liquid-phase method: React at 20-60℃ for 1-3 hours in the presence of a diluent (acetone/isopropanol).
Thickening and stabilizing agents
Coatings/inks: Thickening of water-based systems to enhance leveling (viscosity maximizes at 1% usage).
Oil extraction: Thickener and fluid loss reducer for drilling fluids, with excellent salt resistance (stable at high salt concentrations).
Building materials: Cement mortar water-retaining agent, which delays the setting time and enhances the initial strength.
Medicine and Food
Pharmaceutical preparations: Eye drop/cream thickener, sustained-release skeleton material (stable at pH 2-12).
Food additives: Ice cream/sauce stabilizer (food-grade purity required).
Industrial additives
Polymer polymerization: Protective colloid for emulsion polymerization of vinyl monomers (such as vinyl acetate).
Textile/Papermaking: Fiber sizing agent, paper strengthening agent.
Health risk
Irritation: It causes slight irritation to the eyes, respiratory tract and skin. Protective gloves/goggles should be worn during operation.
Toxicity: Low toxicity (Oral LD₅₀ in rats was not clearly defined, but no acute toxicity reports were made).
Storage requirements
Conditions: Keep away from light and sealed, cool and well-ventilated (≤30℃), relative humidity ≤50%.
Stability: The powder is prone to moisture absorption, and a bacteriostatic agent should be added to the aqueous solution to prevent mold growth (it is prone to degradation within 3 to 5 days at 40℃).
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