Description

Tween 85 is a nonionic surfactant and emulsifier belonging to the polysorbate family, specifically polyoxyethylene (20) sorbitan trioleate. Its primary value lies in its excellent solubilizing and stabilizing properties for oils and hydrophobic compounds in aqueous systems. This makes it a critical functional ingredient for formulators in the pharmaceutical, cosmetic, and food industries who require reliable and safe emulsification.

Application

• Pharmaceuticals: Used as a solubilizer and emulsifier in oral, topical, and injectable formulations to enhance the bioavailability of poorly soluble active ingredients.
• Cosmetics & Personal Care: Functions as a key emulsifier and stabilizer in creams, lotions, and makeup products, ensuring smooth texture and consistent performance.
• Food Industry: Employed as an emulsifier and dispersing agent in food products like baked goods, ice cream, and edible oils to improve texture and shelf stability.
• Industrial Applications: Acts as a surfactant in lubricants, textile processing, and agricultural chemical formulations for improved wetting and dispersion.
• Biotechnology & Research: Utilized in cell culture media and biochemical assays as a gentle, non-denaturing detergent for membrane protein studies.

Basic Information

Product Name	Tween 85
CAS No.	9005-70-3
Molecular Formula	C100H188O28 (Typical)
Molecular Weight	~1840 g/mol (Average)
Synonyms	Polysorbate 85; Polyoxyethylene (20) sorbitan trioleate; POE (20) sorbitan trioleate; Sorbitan, tri-9-octadecenoate, poly(oxy-1,2-ethanediyl) derivs.; Tween® 85; EINECS 500-019-5; Ethoxylated sorbitan trioleate
EINECS	500-019-5

Quality Control

Our Tween 85 is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets relevant specifications for identity, purity, and performance. We can supply material compliant with various grades, including technical, cosmetic, and food-grade standards (e.g., FCC). A Certificate of Analysis (COA) detailing specific test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is easily oxidized; for long-term storage, consider an inert atmosphere (e.g., nitrogen blanket) to maintain optimal quality. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Yellow to amber viscous liquid
Identification (IR)	Conforms
Assay (Saponification Value)	83 - 93 mg KOH/g
Water Content (KF)	≤ 3.0 %
Acid Value	≤ 2.0 mg KOH/g
Hydroxyl Value	39 - 52 mg KOH/g
pH (5% Solution)	5.0 - 7.0

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