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Polysorbate 65
Product Details
Category
Surfactant; Emulsifier; Solubilizer; Humectants
Molecular Formula
C100H194O28
Molecular Weight
1844.55
Grade
Pharmceutical Excipients
Description
The product is an amber oily viscous liquid.
UNII
NA
Chemical Name
Polyoxyethylene 20 sorbitan monolaurate
CAS Number
9005-71-4
Synonyms
Tween 65; sorbitan rioctadecanoate poly(oxy-1, 2-ethanediyl) derivatives
Administration route
Topical
Dosage Form
Intramuscular injection, intravenous injection, oral, topical, rectal, vaginal preparations
Stability and Storage Conditions
Polysorbate is stable to electrolytes, weak acids and weak bases; it will gradually saponify in case of strong acids and strong bases. Its oleate is susceptible to oxidation. Polysorbate is hygroscopic, check its moisture content before use, and dry if necessary. Polysorbate, like other polyoxyethylene surfactants, will produce peroxides when stored for too long. Polysorbate should be stored in a sealed container, away from light, in a cool and dry place.
Commonly used amount and the maximum amount
The World Health Organization has evaluated the acceptable daily intake of polysorbate 20, 40, 60, 65, and 80. Calculated on the basis of total polysorbate, the daily intake can be as high as 25mg per kilogram of body weight. The marketed topical emulsion, the maximum dosage in the cream is 6.00%.
Source and Preparation
Polysorbate 65 is a polyoxyethylene ether of tristearate produced by esterifying the hydroxyl group of dehydrated sorbitol with stearic acid. Polysorbate is prepared from pear (sugar) alcohol through a three-step reaction. First, sorbitol is dehydrated to form sorbitan (cyclic sorbitan); sorbitan is esterified with fatty acids, such as oleic acid or stearic acid, to form hexose esters; finally, it reacts with ethylene oxide under the action of a catalyst Generate polysorbate.
Applications
Polysorbates containing 20 oxyethylene units are hydrophilic nonionic surfactants widely used as emulsifiers for stable oil-in-water pharmaceutical emulsions. Polysorbates are also used as solubilizers for various substances, including essential oils and oil-soluble vitamins, and as wetting agents for oral or parenteral suspensions. Polysorbates have been found to help increase the oral bioavailability of drug molecules that are substrates of p-glycoprotein.
Safety
Polysorbates are widely used in cosmetics, foods, and preparations for oral, parenteral, and topical administration, and are generally considered to be non-toxic and non-irritating materials. There have been occasional reports of hypersensitivity to polysorbates when used topically and intramuscularly. Polysorbates have also been associated with some serious adverse effects, including death, reported in low-birth-weight newborns when vitamin E preparations containing a mixture of polysorbate 20 and polysorbate 80 were administered intravenously. When heated to decomposition, polysorbate emits acrid and pungent fumes.
Incompatibilities
Polysorbate reacts discoloration and/or precipitation with various substances, especially phenol, tannin, tar and tar-like substances. In the presence of polysorbates, the antimicrobial activity of the preservative parabens was reduced.
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Please note: Our products and services are not intended to be used directly in diagnostic or therapeutic procedures.
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