Medicinal grade iron oxide silicon dioxide titanium dioxide 25kg Jinyang

Medicinal grade iron oxide Silica Titanium dioxide 25kg Jinyang pharmaceutical grade iron oxide Silica Titanium dioxide 25kg Jinyang titanium dioxide Eryanghuatai Titanium Dioxide TiO2 79.
88 [13463-67-7] This product is calculated according to dry products, containing TiO2 should be 98.
0% ~ 100.
5%.


【Properties】This product is a white powder
.

This product is insoluble
in water, hydrochloric acid, nitric acid or dilute sulfuric acid.

【Identification】 Take about 0.
5g of this product, add 5g of anhydrous sodium sulfate and 10ml of water, mix well, add 10ml of sulfuric acid, heat and boil until clarified, cool, slowly add sulfuric acid solution (25→100) 30ml, dilute with water to 100ml, shake well, and test
according to the following method.

(1) Take 5ml of solution, add a few drops of hydrogen peroxide test solution, that is, orange-red
.

(2) Take 5ml of solution, add several zinc particles, and place for 45 minutes, the solution appears purple-blue
.

【Check】 pH Take 5.
0g of this product, add 50.
0ml of water to dissolve, filter, precision amount of filtrate 10ml, add bromothymol blue indicator liquid 0.
1ml; if blue, add hydrochloric acid titration solution (0.
01mol/L) 1.
0ml, strain to yellow; If yellow, sodium hydroxide titration solution (0.
01mol/L) 1.
0ml, should turn blue
.

Dissolved in water Take 10.
0g of this product, add 0.
5g of ammonium sulfate, add 150ml of water, heat and boil for 5 minutes, cool, quantitatively transfer to a 200ml measuring bottle, dilute with water to the scale, shake well, centrifuge, take the supernatant, filter the membrane, so that to the clear liquid, precision amount of refill 100ml, placed in a crucible of constant weight, steam dry, blazing to constant weight
.

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