Meilleur polysorbate fabriqué en Chine 20 Avec un prix pas cher

1) Nom du produit: tween 20
3) spécification: ≥99%
4) Méthode d'essai: HPLC
5) Apparence: Light Yellow oil Liquid
6) Personnage: Soluble dans l'eau, soluble dans l'éthanol, vegetable oil, toluene, acétate d'éthyle, methanol, insoluble in mineral oil. Low temperature gelatinize, after heat recovery. Have a special foul-smelling and slightly bitter taste. Dispersion of phthalocyanine green have help;
7) identification method:
(1) de ce produit (20) 1-5 ml of solution, add sodium hydroxide solution 5 ml, boiling for a few minutes, put the cold, with thin Hydrochloric acid acidification, milky haze.
(2) (1 – > 20) pick up the product solution, try adding bromine drops, bromine test solution that fade.
(3) take this product 6 ml, add water, 4 ml and mixed with glue.
(4) take this product (1 – > 20) 10 ml of solution, and cobalt ammonium thiocyanate solution (with cobalt nitrate in ammonium thiocyanate 17.4 g 2.8 g, add water to dissolve into 100 ml) 5 ml, blender, ajouter 5 ml, chloroform vibration wave mixing, quiet place, blue chloroform layer.