Pharmaceutical grade polysorbate 20 tween 20cas9005-64-5 uses

 Pharmaceutical grade polysorbate 20 Tween 20cas9005-64-5 uses Tween 20 is an oil-in-water (O/W) emulsifier, which can be used as a solubilizer, diffusing agent, stabilizer, antistatic agent, lubricant, such as Used as mineral oil emulsifier, cosmetic emulsifier, pharmaceutical emulsifier, cosolvent for dyes, foam stabilizer, photographic emulsion auxiliaries, viscosity modifier for shampoo, antistatic silk in spinning oil Synergists, fiber processing aids,
etc.

It is especially suitable for use with Span-20 Polysorbate 20 (9005-64-5) Properties: 1.
Its appearance is brownish-lime-colored to amber-colored liquid, with a slight special odor at 25℃, and a slightly bitter taste
.

2.
Soluble in water, ethanol, ethyl acetate, methanol and dioxane
.

Insoluble in mineral oil and mineral spirits
.

3.
HLB value 16.
9 [9005-64-5] This strain is polyoxyethylene 20 laurel sorbitan which is polymerized from sorbitan laurel and ethylene oxide
.

【Properties】This product is light yellow or yellow viscous oily liquid
.

This product is easily soluble in water, ethanol, methanol or ethyl acetate, and slightly soluble in liquid paraffin
.

Relative density The relative density of this product (general rule 0601) is 1.
09 to 1.
12
.

　　Viscosity The kinematic viscosity of this product (the first method of general rule 0633) is 250～400mm2/s at 25℃ (the inner diameter of the capillary is 2.
0mm or suitable capillary inner diameter)
.

　　The acid value of this product is about 10g, accurately weighed, placed in a 250ml conical flask, add 50ml of neutral ethanol (neutral to phenolphthalein indicator solution) to dissolve, heat to reflux for 10 minutes, let cool, add 5 drops of phenolphthalein indicator solution , titrated with sodium hydroxide titration solution (0.
1mol/L), the acid value (general rule 0713) should not exceed 2.
0
.

　　Hydroxyl Value The hydroxyl value of this product (general rule 0713) is 96-108
.

　　Peroxidation value The peroxide value of this product (General Rule 0713) shall not exceed 10
.

　　Saponification value The saponification value of this product (general rule 0713) is 40-50
.

　　[Identification] (1) Take 5ml of the aqueous solution (l→20) of this product, add 5ml of sodium hydroxide test solution, boil for several minutes, let it cool, and acidify with dilute hydrochloric acid, showing milky white turbidity
.

　　(2) Take 2ml of the aqueous solution (l→20) of this product, add 0.
5ml of bromine test solution dropwise, the bromine test solution will not fade
.

　　(3) Take 10ml of the aqueous solution (1→20) of this product, add 5ml of cobalt ammonium thiocyanate solution (take 17.
4g of ammonium thiocyanate and 2.
8g of cobalt nitrate, add water to dissolve into 100ml), mix well, and add another 5ml , shake and mix, after standing, the three layers are blue
.