Hydroxypropyl starch CAS 9049-76-7
Chemical Name: Hydroxypropyl starch
Synonyms: Starch 2-hydroxypropyl ether; Hydroxypropyl starch ether; 2-Hydroxypropyl starch
Cas No.: 9049-76-7
Molecular Fomula: C24H42O21
Molecular Weight: 666.57768
Appearance: White Powder
Hydroxypropyl Starch (CAS 9049-76-7): Technical Guide & Industry Applications
Table of Contents
1. Product Overview & Specifications
| Parameter | Hydroxypropyl Starch | Native Starch |
|---|---|---|
| CAS Number | 9049-76-7 | 9005-25-8 |
| Appearance | White free-flowing powder | White powder |
| Solubility | Cold water insoluble; forms transparent viscous colloid upon heating | Cold water insoluble |
| Freeze-Thaw Stability | ≥5 cycles without syneresis | ≤2 cycles |
| Viscosity Stability (pH 3-9) | ±5% variation | ±25% variation |
Chemical Formula: C₃H₈O₂·x
Molecular Weight: 780.76 g/mol (average)
Substitution Degree: 0.05-0.15 (food grade)
2. Key Functional Properties
- Thermal Stability: Maintains viscosity at 90-120°C processing temperatures
- Shear Resistance: ≤15% viscosity loss under high-shear conditions
- pH Tolerance: Stable performance across pH 3-11 range
- Film Formation: Creates oxygen-impermeable edible films (25-50μm thickness)
- Moisture Retention: 1g binds 3-5g water in frozen systems
3. Industrial Applications
| Industry | Application | Performance Benefit |
|---|---|---|
| Food Manufacturing | Frozen desserts, sauces, ready meals | Ice crystal inhibition, texture preservation |
| Pharmaceuticals | Tablet disintegrant, capsule material | 30-60 second disintegration time |
| Paper Coating | Surface sizing agent | Ink absorption rate: 15-20 g/m² |
| Textile Processing | Warp sizing composition | 30% reduction in fiber breakage |
4. Verified Case Studies
4.1 Frozen Food Manufacturer (Asia)
Challenge: Reduce ice crystal formation in dumplings during -18°C storage
Solution: 0.8% HPS in dough formulation
Result: 60% reduction in product rejection rate
4.2 Pharmaceutical Company (Europe)
Challenge: Develop vegan capsule alternative to gelatin
Solution: HPS-based capsule shells (size 00)
Result: 45-second disintegration meeting USP requirements
5. Safety & Regulatory Status
- GRAS status (FDA 21 CFR §172.892)
- JECFA ADI: Not specified
- EU Approval: E1440 (Directive 95/2/EC)
- Allergen-free certification available
6. Technical Inquiry
For formulation support or custom specifications:
Email: info@vivalr.com
Tel: (86) 15866781826
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