What is Steareth-21 CAS 9005-00-9?

Steareth-21 is a nonionic ethoxylated stearyl alcohol, also known as polyoxyethylene stearyl ether or PEG stearyl ether. It has CAS 9005-00-9, EC 500-017-8, and is normally supplied as a white to off-white solid, flake, pellet, or waxy mass.

Is Steareth-21 a single pure compound?

No. Commercial Steareth-21 is an ethoxylated fatty alcohol mixture with a nominal number of ethylene oxide units. It is characterized by HLB, melting range, physical form, and application specifications rather than treated as one isolated laboratory molecule.

What HLB value should be expected for Steareth-21?

Steareth-21 is a high-HLB O/W emulsifier. Typical supplier values are about 15.0-15.5, so it is used as the hydrophilic emulsifier in oil-in-water cream and lotion systems rather than as a low-HLB co-emulsifier.

How is Steareth-21 different from Steareth-2 or Steareth-20?

The number indicates a different nominal degree of ethoxylation. Steareth-21 has a longer EO chain and higher HLB than Steareth-2, and should not be used interchangeably with Steareth-20 or other steareth grades without checking the target emulsion type and HLB balance.

Steareth-21 CAS 9005-00-9

Steareth-21, also called polyoxyethylene stearyl ether or PEG stearyl ether, CAS 9005-00-9, is a high-HLB nonionic emulsifier supplied for oil-in-water cosmetic and personal care emulsions. Confirm the required grade and specification, then request a quotation with COA/TDS/SDS for bulk supply.

CAS: 9005-00-9
Synonyms: Steareth-21; Polyethylene Glycol Octadecyl Ether; Polyoxyethylene Stearyl Ether
Einecs: 500-017-8
Grade: Formulation / cosmetic raw material grade
Package: Standard export packaging

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Product Description

Steareth-21 CAS 9005-00-9 is a nonionic ethoxylated stearyl alcohol with EINECS 500-017-8.

Synonyms: Polyoxyethylene stearyl ether; Polyethylene glycol octadecyl ether; PEG stearyl ether.

CAS: 9005-00-9.

As an ethoxylated fatty alcohol mixture, no single molecular formula applies.

It is normally supplied as a white to off-white solid, flake, pellet, or waxy mass.

It is also called polyoxyethylene stearyl ether or PEG stearyl ether.

It is mainly used as a nonionic emulsifier and formulation aid in oil-in-water creams, lotions, and cosmetic or personal care emulsions.

It is often combined with a lower-HLB emulsifier, fatty alcohol, or consistency agent to build a stable emulsion system.

Steareth-21 is a high-HLB O/W emulsifier with typical supplier values around 15.0-15.5.

It is used as the hydrophilic emulsifier in oil-in-water cream and lotion systems rather than as a low-HLB co-emulsifier.

Confirm appearance, hydroxyl value, moisture, acid value, color, and related impurities or residual solvent.

Confirm the target emulsion type and HLB balance before ordering.

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

Use appropriate PPE and prevent spills or contamination.

Confirm packaging suitable for the supply form and order quantity, and follow the current SDS.

Every batch is checked for appearance, hydroxyl value, moisture, acid value, color, and related impurities, with COA/TDS/SDS supplied per grade.

Confirm appearance, hydroxyl value, color, packaging, and grade as required.

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, quantity, packaging, destination, and document needs.

FAQ - Technical & Supply Chain

Q:
What is Steareth-21 CAS 9005-00-9?

A: Steareth-21 is a nonionic ethoxylated stearyl alcohol, also known as polyoxyethylene stearyl ether or PEG stearyl ether. It has CAS 9005-00-9, EC 500-017-8, and is normally supplied as a white to off-white solid, flake, pellet, or waxy mass.
Q:
Is Steareth-21 a single pure compound?

A: No. Commercial Steareth-21 is an ethoxylated fatty alcohol mixture with a nominal number of ethylene oxide units. It is characterized by HLB, melting range, physical form, and application specifications rather than treated as one isolated laboratory molecule.
Q:
What HLB value should be expected for Steareth-21?

A: Steareth-21 is a high-HLB O/W emulsifier. Typical supplier values are about 15.0-15.5, so it is used as the hydrophilic emulsifier in oil-in-water cream and lotion systems rather than as a low-HLB co-emulsifier.
Q:
How is Steareth-21 different from Steareth-2 or Steareth-20?

A: The number indicates a different nominal degree of ethoxylation. Steareth-21 has a longer EO chain and higher HLB than Steareth-2, and should not be used interchangeably with Steareth-20 or other steareth grades without checking the target emulsion type and HLB balance.
Q:
Where is Steareth-21 mainly used?

A: It is mainly used as a nonionic emulsifier and formulation aid in oil-in-water creams, lotions, and cosmetic or personal care emulsions. It is often combined with a lower-HLB emulsifier, fatty alcohol, or consistency agent to build a stable emulsion system.

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