Polyoxyethylene sorbitan monopalmitate

Product Details

CasNo： 9005-66-7

MF： C62​H122​O26​

Appearance： liquid

Delivery Time： 15 days

Packing： 200kg/drum

Purity： 99%

Basic Information

• English Name: Tween 40, Polyoxyethylene(20) Sorbitan Monopalmitate, Polysorbate 40
• CAS No.: 9005-66-7
• Molecular Formula: C62​H122​O26​
• Relative Molecular Weight: 1283.65

Technical Indicators

• Appearance: Yellow to amber oily liquid or paste
• Relative Density: 1.05–1.10
• Acid Value (as KOH): ≤2 mgKOH/g
• Hydroxyl Value (as KOH): 85–100 mgKOH/g
• HLB Value: 15.6
• Refractive Index: 1.470
• Saponification Value (as KOH): 40–55 mgKOH/g
• Water Content: ≤3%

Physical and Chemical Properties

• Viscosity: 0.4–0.6 Pa·s (at 25°C)
• Solubility: Soluble in water, dilute acids, dilute alkalis, and most organic solvents; insoluble in animal oils, mineral oils, and fats.
• Stability: Stable under normal storage conditions. Compatible with most surfactants and ingredients; sensitive to strong acids and alkalis, which may cause saponification.

Performance Characteristics

Tween 40 is an oil-in-water (O/W) emulsifier with excellent emulsifying, solubilizing, stabilizing, dispersing, and antistatic properties. Its high HLB value (15.6) ensures strong hydrophilicity, making it effective for stabilizing water-based formulations and enhancing the dispersion of oil-soluble ingredients in aqueous systems. It also exhibits good compatibility with other surfactants (e.g., Spans) and additives, improving overall formulation flexibility.

Main Uses

• Food Industry: Used as an emulsifier and stabilizer in ice cream, pastries, and baked goods to improve texture and prevent ingredient separation, resulting in a smoother mouthfeel.
• Cosmetics Industry: Functions as a solubilizer and emulsifier in skincare products, shampoos, and lotions, helping oil-soluble active ingredients (e.g., vitamins, fragrances) disperse uniformly in water-based formulas.
• Pharmaceutical Field: Serves as a pharmaceutical excipient in emulsions, suspensions, and topical preparations to enhance drug solubility and stability.
• Other Fields: Applied as an antistatic agent and fiber lubricant in the textile industry; used as a gas chromatography stationary phase for separating and analyzing fatty acid esters, alcohols, ketones, and halides.

Packaging and Storage

• Packaging: Typically packed in 200kg iron drums. Custom packaging options are available upon request.
• Storage: Store in a dry, well-ventilated area away from direct sunlight and moisture. Avoid extreme temperatures. Shelf life is generally 2 years under proper storage conditions.