Hydroxypropyl starch CAS 9049-76-7

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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

Estimated Delivery: Mon, Nov 02 – Fri, Nov 06

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Hydroxypropyl Starch (CAS 9049-76-7): Technical Guide & Industry Applications

1. Product Overview & Specifications
2. Key Functional Properties
3. Industrial Applications
4. Case Studies
5. Safety & Regulatory Compliance
6. Technical Inquiry

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