sorbitan tristearate

overview

Product Name: Sorbitan Tristearate
Common Name: Span 65
CAS Number: 26658-19-5
EINECS Number: 247-873-1
Molecular Formula: C60H114O8
Molecular Weight: 995.52 g/mol
Sorbitan Tristearate, also known as Span 65, is a nonionic surfactant obtained by the esterification of sorbitol with three molecules of stearic acid.
It functions primarily as a water-in-oil (W/O) emulsifier and is widely used in food, cosmetics, pharmaceuticals, and plastic processing industries.
Span 65 is valued for its strong emulsifying power, excellent dispersibility in oils, and ability to stabilize emulsions and improve product texture.

Molecular structure description

Hydrophobic (lipophilic) part: Three stearic acid (C₁₈ fatty acid) chains
Hydrophilic part: Sorbitan (dehydrated sorbitol) core
HLB value: ~2.1 (highly lipophilic, excellent for water-in-oil emulsions)

Specifications

Sorbitan Tristearate typically appears as a white to pale yellow hard wax or solid flake with a mild characteristic odor. It is highly lipophilic and insoluble in water but soluble in hot oils and organic solvents such as chloroform, benzene, and toluene. When dispersed in water, it forms a milky emulsion.
Due to its low HLB value and high molecular weight, Span 65 is especially effective in stabilizing water-in-oil emulsions and improving the consistency and shelf-life of end products. It is commonly used in margarine, shortening, chocolate, and baking applications in the food industry. In cosmetics and pharmaceuticals, it enhances the viscosity and stability of creams and ointments. Additionally, it serves as a mold-release agent and anti-static additive in plastics and polymer processing.

Test Item	Unit	Minimum Value	Maximum Value
Saponification Value	mgKOH/g	178	188
Iodine Value	mgKOH/g	66	80
Acid Value	mgKOH/g	—	15
Moisture	%	—	1.5
Saturated Fatty Acid	%	85	92
Polyunsaturated Fatty Acid	%	14	21
Sulfated Ash	%	—	0.5
Melting Point	°C	47	50
Lead	mg/kg	—	2

Applications

sorbitan tristearate (Span 60) is widely used in multiple industries due to its emulsifying, lubricating, stabilizing, and defoaming properties.
It works well in water-in-oil emulsions and provides excellent compatibility with other nonionic surfactants.
Its mild nature and versatility make it a preferred ingredient in formulations requiring stability and safety.

Emulsification Efficiency – Stable W/O Emulsions

Sorbitan esters are highly effective in forming stable water-in-oil emulsions. Ideal for margarine, creams, and ointments, they help maintain consistency and prevent separation over time.

Mild & Skin-Friendly – Ideal for Cosmetics

Widely used in lotions, creams, and makeup products, sorbitan esters are non-irritating and suitable for sensitive skin. They provide smooth textures and enhance product stability.

Food Grade & Safe – Emulsifiers for Processing

Approved for food use, they act as emulsifiers in sauces, dairy products, and spreads. Improve mouthfeel, extend shelf life, and maintain homogeneity of processed foods.

Pharmaceutical Use – Enhances Drug Stability

Used in medicinal creams, gels, and suspensions, sorbitan esters help deliver oil-soluble actives effectively. They improve bioavailability and ensure long-term formulation stability.

storage & package

Storage:
Store in a cool, dry, and well-ventilated area, away from direct sunlight and sources of heat.
Avoid contact with harmful or incompatible substances. Handle with care during transportation to prevent leakage or contamination.

Transportation:
Transport as a general chemical product, following standard safety and handling procedures.

Package:
Sorbitan Tristearate is packed in high-quality PE drums with double-seal lids.
Standard packaging sizes include 25kg/drum, 200kg/drum, and 1000kg IBC tote to meet different usage needs.