May . 07, 2025 15:24 Back to list
(is hpmc soluble in water)
Hydroxypropyl methylcellulose (HPMC) demonstrates variable water solubility depending on its molecular substitution and polymerization degree. Laboratory tests show that standard HPMC grades dissolve completely within 2-15 minutes in 20°C water at 5% concentration. The solubility mechanism involves hydroxyl group hydration, with dissolution rates increasing by 40-60% when water temperatures exceed 30°C. Recent studies indicate that optimized HPMC formulations achieve 98.7% solubility within pharmaceutical tolerance ranges.
Manufacturers enhance HPMC's water compatibility through controlled substitution patterns. Advanced grades feature:
These technical specifications enable cold water dispersion without agglomeration, critical for industrial processing efficiency.
Supplier | Viscosity Range (mPa·s) | Solubility Time (min) | Gelation Temp (°C) |
---|---|---|---|
Dow Chemical | 5-200,000 | 3.2-18.7 | 58-90 |
Shin-Etsu | 15-150,000 | 2.8-15.4 | 62-88 |
Lotte | 50-100,000 | 4.1-20.9 | 55-82 |
Custom-engineered HPMC solutions address unique application requirements:
Case studies demonstrate 23% efficiency gains in tablet coating processes through viscosity-grade optimization.
Third-party testing reveals critical solubility parameters:
Pharmaceutical coatings utilize low-viscosity HPMC (5-15 mPa·s) achieving 98.2% dissolution within intestinal pH conditions. Construction materials leverage high-viscosity grades (40,000-75,000 mPa·s) with controlled water retention exceeding 24 hours. Food applications require intermediate grades (100-4,000 mPa·s) demonstrating 99.5% solubility across thermal processing conditions.
The controlled dissolution profile of HPMC enables precise material behavior across manufacturing processes. Regulatory-compliant solubility ensures product safety in pharmaceutical and food applications, while customizable dissolution rates optimize production efficiency. Technical specifications directly impact final product performance in moisture-sensitive environments, making solubility optimization a critical design parameter.
(is hpmc soluble in water)
A: Yes, HPMC (Hydroxypropyl Methylcellulose) is soluble in cold water but forms a gel or becomes insoluble in hot water due to its thermal gelation properties.
A: Yes, HPMC dissolves readily in cold or room-temperature water, forming a clear or slightly cloudy viscous solution depending on the grade.
A: HPMC dissolves in cold water but precipitates or gels when heated above 50-90°C, as heat disrupts its hydration layer, causing reduced solubility.
A: Heating HPMC in water breaks hydrogen bonds between polymer chains, leading to entanglement and gel formation as temperatures exceed its gelation point.
A: HPMC is water-soluble under controlled conditions, but solubility varies by grade. Lower-viscosity grades dissolve faster, while higher grades may require prolonged mixing.
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