Tween 80 is a non-ionic surfactant and emulsifier. It is an amber oily liquid. Tween 80 has a special odor and a slightly bitter taste. , it becomes gelatinous at low temperatures and recovers after being heated. It is easily prepared from sorbitan and oleic acid through ethoxylation and is often used as an emulsifier in food.
Stability and storage conditions:
According to the supply of Tween 80: Tween 80 is easily soluble in water, soluble in mineral oil and corn Oil, dioxane, cellosolve, methanol, ethanol, ethyl acetate, aniline, toluene, petroleum ether, cottonseed oil, acetone, carbon tetrachloride, 5% dilute sulfuric acid, sodium hydroxide, sodium sulfate, chloride Aluminum can be dispersed in ether and ethylene glycol. Insoluble in mineral oil.
Tween surfactants are relatively stable and stable to electrolytes, weak acids and weak bases; they will gradually saponify when exposed to strong acids and alkalis; their oleic acid esters are easy to oxidize and will produce peroxides when stored for too long. Peroxide, heavy metal ions, rising temperature, and light irradiation accelerate the autoxidation of aqueous solutions, break the polyoxyethylene chain, and simultaneously hydrolyze to generate fatty acids. Tween 80 aqueous solution is quite stable at a pH value of 3 to 7.6, and has the lowest hydrolysis rate. Tween should be placed in an airtight container and stored in a cool, dry place away from light.
Incompatibility:
Tween will undergo discoloration or precipitation reactions with many substances, especially phenol, tannic acid, tar and tar-like substances. Tween also affects the antibacterial activity of the preservatives hydroxyphenyl esters. Tween 80 can bond with parabens a, propylene, and butyl ester, and the bonding ability decreases as the temperature increases. Tween 80 can also reduce the antiseptic ability of various preservatives such as chlorobutanol and benzyl alcohol, but has less impact on formaldehyde, sorbic acid, benzoic acid and phenylmercuric acetate.
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