Лучший полисорбат, сделанный в Китае 20 По низкой цене

1) Наименование товара: tween 20
3) Спецификация: ≥99%
4) Метод испытания: ВЭЖХ
5) Внешний вид: Light Yellow oil Liquid
6) символ: Растворимые в воде, растворим в этаноле, vegetable oil, toluene, этилацетат, метанол, 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) этот продукт (20) 1-5 ml of solution, add sodium hydroxide solution 5 мл, 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 мл, 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 г 2.8 г, add water to dissolve into 100 мл) 5 мл, blender, добавлять 5 мл, chloroform vibration wave mixing, quiet place, blue chloroform layer.