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7.
Product Standard
8.
Quality inspection
Assay: Accurately weigh about 0.
8g sample, place it in a glass titration cup, and add 10mL of absolute ethanol
.
Put in the electromagnetic stirring rod, cover the stopper, turn on the magnetic stirrer, after the sample is fully wetted, add about 1.
Blank experiment: In another glass titration cup, add 10 mL of absolute ethanol and 1.
1 mL of 10% sodium hydroxide
.
When the titration reaches pH 10.
In the formula: c——molar concentration of hydrochloric acid standard solution, mol/L;
V 1 ——The volume of 0.
1mo/L hydrochloric acid standard solution consumed when titrating free alkali, mL;
V 2 ——The volume of 0.
1mol/L hydrochloric acid standard solution used in the titration of total alkali, mL;
△ V ——The volume of 0.
1mol/L hydrochloric acid standard solution used in the blank experiment, mL;
G——The mass of the sample, g
.
9.
Product use
Ice dye naphthol
.
Used as a primer for dyeing and printing of cotton fibers, viscose fibers and some synthetic fibers, and as an intermediate for the synthesis of fast pigments and organic pigments
10.
Security measures
(1) Poisonous or highly corrosive raw materials such as o-anisidine , phosphorus trichloride , chlorobenzene, 2,3-acid, etc.
are used in production, and the reaction equipment should be sealed to prevent leakage
.
The ventilation in the workshop should be strengthened, and the operators should wear labor protection equipment
(2) This product is toxic.
It is packaged in plastic plywood barrels or iron barrels.
Stored in a cool, dry and ventilated warehouse, protected from heat, sun and moisture
.
Store and transport in accordance with toxic chemicals regulations
Related links: Production principle of 2-hydroxy-3-naphthoyl o-anisidine
