Steareth-2 [Unicol SA-2]

Chemical Formula:

C₁₈H₃₇(OCH₂CH₂)₂OH (approximate)

CAS Number:

9005-00-9

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Steareth-2 [Unicol SA-2]

Chemical Formula:

C₁₈H₃₇(OCH₂CH₂)₂OH (approximate)

CAS Number:

9005-00-9

Steareth-2 is a polyethylene glycol ether of stearyl alcohol, containing an average of 2 ethylene oxide units. It is a low-HLB, nonionic surfactant that acts primarily as a co-emulsifier in water-in-oil emulsions. This ingredient is widely used in creams, lotions, and ointments to stabilize formulations and improve consistency. Its compatibility with high-HLB emulsifiers like Steareth-20 makes it an important ingredient for balanced emulsification systems.

Characteristics

Molar Weight

~346 g/mol (variable)

Melting Point

~50–55°C

Boiling Point

Decomposes before boiling

Solubility

Insoluble in water, soluble in oils and alcohols

Density

~0.95 g/cm³

Forms

White to off-white waxy solid or flakes

Odor

Mild, fatty odor

USES AND APPLICATIONS

Key applications

Used as co-emulsifier in W/O emulsions
Provides stability in creams and lotions
Improves consistency of ointments and balms
Works in combination with Steareth-20
Used in industrial emulsions and coatings

Industries

Cosmetics and personal care
Pharmaceutical formulations
Skin care and ointment bases
Industrial emulsification systems

Synonyms

Polyoxyethylene (2) stearyl ether, PEG-2 stearyl ether, Stearyl alcohol ethoxylate

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