What is Hydroxypropyl Starch Ether HPS CAS 9049-76-7?

HPS is a non-ionic modified starch ether made by introducing hydroxypropyl groups onto natural starch. It is used as a water-soluble thickener and rheology modifier in dry-mix mortar, gypsum, oil drilling fluids, and other water-based systems.

Can HPS replace HPMC in tile adhesive or wall putty?

It is not normally a full replacement for HPMC because HPMC provides primary water retention. HPS is usually added in a smaller amount to improve workability, sag resistance, and anti-slip behavior while helping reduce part of the cellulose ether dosage.

Does Hydroxypropyl Starch Ether change cement or gypsum setting time?

Because HPS is non-ionic, it generally has a neutral effect on cement and gypsum hydration. It does not usually cause the strong retardation associated with some sugars or ionic additives.

How should Hydroxypropyl Starch Ether be dispersed in water?

The powder is designed for rapid dispersion in cold water, but it should be added under continuous mixing to prevent lumps. In dry-mix formulations, it is normally dry-blended with cement, gypsum, and other powders before water is added.

What are the main applications of Hydroxypropyl Starch Ether CAS 9049-76-7?

In construction it is used in tile adhesives, wall putty, gypsum plasters, and self-leveling compounds. In oil and gas drilling fluids it helps control fluid loss, stabilize the borehole, and maintain viscosity and suspension of solids.

Hydroxypropyl Starch Ether (HPS) CAS 9049-76-7

Hydroxypropyl Starch Ether, also called HPS or starch 2-hydroxypropyl ether, CAS 9049-76-7, is a non-ionic modified starch supplied for construction and oilfield applications. Confirm the required grade, viscosity and substitution degree, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 9049-76-7
Synonyms: HPS, Starch 2-hydroxypropyl ether, Modified Starch Ether, Hydroxypropyl starch, Construction Starch Ether
Grade: Construction Grade, Oil Drilling Grade, Industrial Grade.
Package: 25kg Multi-ply Paper Bag (with PE liner) or 600kg Big Bag.

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Product Description

Hydroxypropyl Starch Ether CAS 9049-76-7 is a non-ionic modified starch ether, also known as HPS or starch 2-hydroxypropyl ether, made by introducing hydroxypropyl groups onto natural starch.

Synonyms: HPS; Starch 2-hydroxypropyl ether; Modified Starch Ether; Hydroxypropyl starch; Construction Starch Ether.

CAS: 9049-76-7.

As a modified natural polysaccharide, it is described by its substitution degree and viscosity rather than a single fixed molecular formula.

It appears as a white to off-white powder.

It disperses rapidly in cold water without clumping, forming a clear to slightly hazy solution.

It is a non-ionic thickener and rheology modifier for water-based systems.

It offers good water solubility, stability and compatibility with cellulose ethers such as HPMC.

In dry-mix mortars it improves workability, sag resistance and anti-slip behavior, helping reduce part of the cellulose ether dosage.

In oilfield drilling fluids it helps control fluid loss, stabilize the borehole and maintain viscosity and suspension of solids.

It generally has a neutral effect on cement and gypsum hydration and does not cause the strong retardation of some sugars or ionic additives.

In dry-mix formulations it is normally dry-blended with cement, gypsum and other powders before water is added.

Store in a cool, dry, well-ventilated area in tightly closed containers away from moisture and heat.

Protect from moisture and keep containers closed when not in use.

Confirm appearance, substitution degree, viscosity, moisture and particle size as required.

Use suitable dust and eye protection during handling, and wash skin contact with soap and water.

Confirm packaging with the requested quantity and destination requirements.

The page is an RFQ entry point and does not state stock, price, MOQ or fixed lead time.

For an RFQ, state the intended application, required grade, viscosity, substitution degree, quantity, packaging, destination and document needs.

FAQ - Technical & Supply Chain

Q:
What is Hydroxypropyl Starch Ether HPS CAS 9049-76-7?

A: HPS is a non-ionic modified starch ether made by introducing hydroxypropyl groups onto natural starch. It is used as a water-soluble thickener and rheology modifier in dry-mix mortar, gypsum, oil drilling fluids, and other water-based systems.
Q:
Can HPS replace HPMC in tile adhesive or wall putty?

A: It is not normally a full replacement for HPMC because HPMC provides primary water retention. HPS is usually added in a smaller amount to improve workability, sag resistance, and anti-slip behavior while helping reduce part of the cellulose ether dosage.
Q:
Does Hydroxypropyl Starch Ether change cement or gypsum setting time?

A: Because HPS is non-ionic, it generally has a neutral effect on cement and gypsum hydration. It does not usually cause the strong retardation associated with some sugars or ionic additives.
Q:
How should Hydroxypropyl Starch Ether be dispersed in water?

A: The powder is designed for rapid dispersion in cold water, but it should be added under continuous mixing to prevent lumps. In dry-mix formulations, it is normally dry-blended with cement, gypsum, and other powders before water is added.
Q:
What are the main applications of Hydroxypropyl Starch Ether CAS 9049-76-7?

A: In construction it is used in tile adhesives, wall putty, gypsum plasters, and self-leveling compounds. In oil and gas drilling fluids it helps control fluid loss, stabilize the borehole, and maintain viscosity and suspension of solids.

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