Description

Sodium Steareth-4 Phosphate is an anionic surfactant derived from stearyl alcohol ethoxylate, widely recognized for its excellent emulsifying, cleansing, and skin-conditioning properties. Its unique phosphate ester structure provides superior mildness and compatibility with a broad range of cosmetic and personal care formulations. This ingredient is essential for manufacturers in the cosmetics, skincare, and hair care industries seeking to create stable, high-performance emulsions and cleansing products with a luxurious feel.

Application

• Primary Emulsifier in cosmetic creams, lotions, and sun care products for creating stable oil-in-water (O/W) emulsions.
• Cleansing Agent in facial cleansers, shower gels, and shampoos, offering mild yet effective surfactant action.
• Foam Booster and Stabilizer in liquid soaps and bath products to enhance lather quality and volume.
• Skin Conditioning Agent that imparts a soft, smooth after-feel in leave-on and rinse-off skincare formulations.
• Co-emulsifier and Stabilizer in complex emulsion systems, improving texture and long-term stability.
• Industrial Surfactant for specialty cleaning formulations and textile processing aids where mildness is required.

Basic Information

Product Name	Sodium Steareth-4 Phosphate
CAS No.	87666-99-7
Molecular Formula	C22H46O7PNa / (C2H4O)nC18H36O4PNa (n~4)
Molecular Weight	Approx. 476.6 g/mol
Synonyms	Sodium POE(4) stearyl ether phosphate; Poly(oxy-1,2-ethanediyl), α-(octadecyl-ω-hydroxy)-, phosphate, sodium salt (4 EO); Steareth-4 Phosphate, Sodium Salt; Sodium polyoxyethylene(4) stearyl ether phosphate; PEG-4 stearyl ether phosphate, sodium salt; Anionic surfactant SPP-4; Phosphoric acid, mono[poly(oxy-1,2-ethanediyl) stearyl ether] ester, sodium salt
EINECS	Contact for details

Quality Control

Our Sodium Steareth-4 Phosphate is produced under strict quality management systems to ensure batch-to-batch consistency and purity suitable for cosmetic and personal care applications. Quality is verified through comprehensive analytical testing, including assay, pH, and residual content analysis. A Certificate of Analysis (COA) documenting key specifications is provided with each shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); the container must be kept tightly sealed after opening to prevent moisture absorption and caking.

Specification

Item	Specification
Appearance	White to off-white paste or solid
Identification (IR)	Complies
Assay (Active Matter)	≥ 95.0 %
pH (10% solution)	6.0 - 8.0
Water Content	≤ 3.0 %
Free Fatty Alcohol	≤ 2.0 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.