Pharmaceutical grade phenolite carbonate 500 g in stock

Pharmaceutical grade phenolite carbonate 500 g spot [Properties] This product is a colorless to reddish needle crystal or crystalline mass; There is a special odor; Moisture inducing; Aqueous solution weakly acidic reaction; In contact with light or in the air the color gradually darkens
.

This product is easily soluble in ethanol, glycerin, fatty oil or volatile oil, dissolved in water, slightly soluble
in liquid paraffin.

Freezing point The freezing point of this product (general rule 0613) is not less than 40 °C
.

【Identification】Take 0.
1g of this product, add 10ml of water to dissolve, and test
according to the following method.

(1) Take 5ml of solution, add 1 drop of ferric chloride test solution, that is, blue-violet color
.

(2) Take 5ml of solution and add brominated test solution, that is, generate a white precipitate that dissolves instantaneously, but when the bromine test solution is excessive, a lasting precipitate is generated
.

(3) The infrared light absorption pattern of this product should be consistent
with the control spectrum (spectral set 240 map).

【Inspection】No volatiles Take 5.
0g of this product, put it in a water bath and steam it out, dry it at 105 ° C to constant weight, and the residual residue shall not exceed 2.
5mg
.

【Content determination】Take about 0.
15g of this product, precision weighing, place in a 100ml measuring bottle, add water to dissolve and dilute to the scale, shake well; precision amount of 25ml, placed in an iodine bottle, precision bromine titration solution (0.
05mol/L) 30ml, and then add 5ml of hydrochloric acid, immediately dense plugging, shaking for 30 minutes, let stand for 15 minutes, pay attention to micro-opening the cork, add potassium iodide test solution 6ml, immediately dense plug, fully shake, add 1ml, shake well, Titration with sodium thiosulfate titration solution (0.
1 mol/L), near the end point, add starch indicator solution, continue titration until blue disappears, and correct
the titration results with a blank test.

Each 1 ml of bromine titration solution (0.
05 mol/L) corresponds to 1.
569 mg of C6H6O
.

【Category】Disinfection and preservatives
.

【Storage】Shading, sealed preservation
.