Product standards and uses of 1-amino-4-bromoanthrone-2-sulfonic acid

7.
Product Standard

8.
Quality inspection

1) Determination of total diazonium value (dry product)

After the sample after measuring the moisture is fully ground, weigh 3g (weigh to 0.
0002g), carefully transfer it into a 500mL round-bottomed flask, add 75mL concentrated sulfuric acid , and heat to dissolve it on a boiling water bath
.

Blank test: Perform blank titration with 75mL concentrated sulfuric acid, 175mL glacial acetic acid and 55mL distilled water at a temperature below 15℃ (usually the consumption of 0.
1mol/L sodium nitrite is about 0.
8mL, if it exceeds 1mL or the end point determination is not obvious , Then glacial acetic acid should be used after oxidative distillation treatment)
.

Where: V ₁ ——the volume of sodium nitrite standard solution consumed during titration, mL;

V ₂ ——The volume of sodium nitrite standard solution consumed in the blank experiment, mL;

c——The molar concentration of sodium nitrate standard solution, mol/L;

G——The mass of the sample, g
.

2) (Dry product) Determination of bromamine acid content

Weigh about 3g of the sample after measuring the moisture (weigh to 0.

In the formula, c ₁ —— molar concentration of sodium nitrite standard solution, mol/L;

V ₁ ——The consumption of sodium nitrite standard solution minus the net consumption of blank when measuring the total diazonium value, that is, (V1-V2) in the calculation formula of the total diazonium value in (2), mL;

c ₂ ——The molar concentration of potassium bromate-potassium bromide standard solution, mol/L;

V ₂ ——The volume of potassium bromate-potassium bromide standard solution added, mL;

c ₃ ——The molar concentration of sodium thiosulfate standard solution, mol/L;

V ₃ ——Volume consumed by sodium thiosulfate standard solution during titration, mL;

G——Sample mass, g;

1.
016—The correction factor of the method
.

9.
Product use

Bromo acid is an important intermediate for the synthesis of anthraquinone-type disperse dyes
.

10.
Security measures

(1) When using 1-aminoanthraquinone, chlorosulfonic acid, o-dichlorobenzene, bromine and other toxic or corrosive raw materials in production, the production equipment should be sealed, the operator should wear labor protection equipment, and the reaction material should be used immediately if it splashes on the skin.
Rinse with plenty of water
.

(2) This product is toxic.
It is packed in iron drums lined with plastic bags and stored in a cool, ventilated and dry place to prevent exposure to the sun and rain
.

Related links: Production principle and process flow of 1-amino-4-bromoanthrone-2-sulfonic acid