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7.
8.
1) Determination of G acid potassium salt content
Accurately weigh about 20g G acid potassium salt sample, dissolve it with distilled water, transfer it to a 1000mL volumetric flask, and dilute to the mark
In the formula, c——molar concentration of diazonium salt of m-nitroaniline, mol/L;
V——Volume of m-nitroaniline diazonium salt solution consumed by titration, mL;
G——The mass of G salt sample, g
2) Determination of R salt content
Take 250 mL of the sample solution prepared during the determination of G salt content and place it in a 600 mL beaker
In the formula: c——molar concentration of iodine standard solution, mol/L;
V——The volume of iodine standard solution added, mL;
c 1 ——The molar concentration of sodium thiosulfate standard solution, mol/L;
V 1 ——Volume of sodium thiosulfate standard solution consumed in titration, mL;
G——G salt sample mass, g;
A——The content of G salt, %
The difference between the two measurement results is within 0.
9.
It is used as a dye intermediate and is an important coupling component.
10.
(1) Toxic or corrosive materials such as 2-naphthol and oleum are used in production, the sulfonation equipment should be sealed, ventilation should be strengthened in the workshop, and the operators should wear labor protection equipment
(2) This product is toxic and is packed in iron drums lined with plastic bags.