INTRODUCTION
Polysorbate 20 is a gentle, oily, liquid cosmetic additive that functions as a non-ionic surfactant and wetting agent that enhances the spread-ability of liquids. As a solubilizer, it helps both essential oils and fragrance oils to attach to various types of cosmetic bases, including liquid, cream, and gel bases, and thereby prevents the oils and bases from separating.
Manufacture
It is made by the reaction of sorbitol and polyol with ethylene oxide. The number 20 here represents the number of molecules of ethylene oxide that were reacted.
| Synonyms | Sorbitan monolaurate, ethoxylated Polyoxyethylene sorbitan monolaurate |
| CAS no. | 9005-64-5 |
| EINECS no. | 500-018-3 |
| Molecular formula | C26H50O10 |
| Molecular weight | 522.7 |
| Structure |  |
Applications
| Food | is used as a wetting agent in flavored mouth drops such as Ice Drops, helping to provide a spreading feeling to other ingredients like SD alcohol and mint flavor |
| Biotechnology | 1) as a washing agent in immunoassays, such as Western blots and ELISAs 2) to saturate binding sites on surfaces (i.e., to coat polystyrene microplates, generally combined with proteins such as BSA) 3) to stabilize proteins purified protein derivative (PPD) solution used in skin testing for tuberculosis exposure 4) as a solubilizing agent of membrane proteins |
| Pharmaceutical | is used as an excipient in pharmaceutical applications to stabilize emulsions and suspensions |
| Industrial | 1) in many brands of baby wipes 2) by philatelists to remove stamps from envelopes and to remove residues from stamps, without harming the stamp itself 3) as wetting agent in rubber balers in the elastomer industry 4) as a shape directing agent to synthesize spheroidal magnetite nano-assemblies |
SPECIFICATIONS
| Test | Unit | Specification |
|---|---|---|
| Appearance | – | Viscous oily liquid |
| Colour | – | Yellowish to Brown |
| Acid value | mgKOH/gm | Max 2.0 |
| Saponification value | mgKOH/gm | 40 – 50 |
| Hydroxyl value | mgKOH/gm | 96 – 108 |
| Moisture content (by KFR) | % | Max 3.0 |
| pH of 5% aqueous solution | – | 5 – 7 |
| Iodine value | I2/100gm | Max 5.0 |
| Solubility | – | Soluble in water and alcohol |
STORAGE
Tightly closed. Keep in a well-ventilated place
PACKING
220 kg HDPE drums
REACH Status
A registration number is not available for this substance as the substance or its uses are exempted from registration, the annual tonnage does not require a registration, or the registration is envisaged for a later registration deadline.
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