Hydroxypropyl Starch Ether (HPS) for Food, Cosmetics, and Daily Chemicals: A Field Note from the Lab and the Factory Floor

If you work with thickeners or rheology modifiers, you’ve probably bumped into [9049 76 7] in spec sheets or procurement chats. It’s the shorthand many buyers use for a versatile Hydroxypropyl Starch Ether (HPS): a fine white powder derived from natural plant starch, modified (highly etherified), then spray-dried—no plasticizer, clean profile, and frankly a workhorse in everything from spoonable yogurts to sulfate-free shampoos. Fast thickening, medium viscosity, water retention, and, as many customers say, “surprisingly good” sag resistance.

What’s driving demand right now?

Three quick trends: (1) clean-label leaning (starch-based over synthetic polymers), (2) microplastic scrutiny in cosmetics—HPS steps in where acrylates struggle, and (3) cost stability vs. cellulose ethers. In fact, formulators tell me they like the “forgiving” processing window and the consistent mouthfeel in beverages. To be honest, it’s not flashy, but it’s reliable.

Technical snapshot

Process flow (how it’s made, the short honest version)

1. Materials: food-grade corn/potato starch, alkali, propylene oxide, purified water.
2. Etherification: controlled alkaline reaction for hydroxypropyl substitution.
3. Neutralization & washing: remove salts/byproducts.
4. Spray drying: consistent particle morphology; no plasticizer.
5. Milling & sieving: tight PSD for smooth hydration.
6. QC testing: moisture (ISO 1666), viscosity (ISO 2555), pH, DS, micro.
7. Packing & traceability: HACCP/ISO 22000 or ISO 22716 lines for food/cosmetics.

Service life: shelf life ≈ 24 months in cool, dry, sealed conditions; functional stability proven across 3 freeze–thaw cycles in typical dairy and lotion bases (our in-house testing—see notes below).

Applications and why formulators pick it

• Food: spoonable yogurts, sauces, beverages—clean mouthfeel, freeze–thaw stability.
• Cosmetics: creams, serums, masks—silky glide, less tack vs. some gums.
• Daily chemical: liquid detergents, gel cleaners—body without stringiness; stable foam.

Advantages: fast thickening, medium viscosity “sweet spot,” a bit of water retention, and superior sag resistance (yes, even helpful in tile adhesives and wall putties—an industrial crossover many R&D folks quietly rely on).

Vendor comparison (real-world buyer notes)

Customization & test data

Custom options: DS 0.1–0.35, particle size fineness, targeted viscosity curves (shear-thinning profiles), and microbial specs for sensitive formulas. Batch COAs reference ISO 1666 and ISO 2555.

Internal test snippet (representative lot): 2% solution, 25°C, Brookfield LV, Spindle 3/12 rpm → 18,500 mPa·s; pH 7.2; moisture 4.7%; TPC 2.4×10^2 cfu/g. Customers report stable viscosity after 12 weeks at 40°C storage—nice.

Case notes

• RTD dairy drink: reduced phase separation vs. native starch, cleaner sip feel.
• Sulfate-free shampoo: better body and combability, less tack than carbomers.
• Multi-surface gel cleaner: improved cling and clarity with [9049 76 7] at 0.6%.

Compliance & documentation: food use under FDA 21 CFR 172.892 and EU E1440 specs; cosmetics produced under ISO 22716. Many buyers also ask for Halal/Kosher—available on request. Frankly, the paperwork is half the job, but it matters.

Final thought: if you want a dependable, plant-derived thickener that plays well across categories, [9049 76 7] HPS hits that practical sweet spot.

Authoritative citations

1. FDA, 21 CFR 172.892 — Food starch-modified.
2. Commission Regulation (EU) No 231/2012 — E1440 Hydroxypropyl starch specifications.
3. Codex Alimentarius, GSFA — Modified starches in food categories.
4. ISO 1666:1996 — Starch — Determination of moisture content.
5. ISO 2555 — Plastics resins — Apparent viscosity by Brookfield viscometer.
6. ISO 22716:2007 — Cosmetics — Good Manufacturing Practices (GMP).