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7.
Product standard (GB1648)
8.
Quality inspection
The content of H acid monosodium salt is determined as follows:
Accurately weigh about 50g of paste (or 25g powder) H acid monosodium salt sample, weigh to 0.
01g, and wash it with distilled water into a 400mL beaker
.
Add 80mL 10% sodium carbonate solution, stir to dissolve, transfer to a 1000mL volumetric flask, dilute to the mark with distilled water, and mix well
In the formula: V——the amount of sodium nitrite standard solution consumed during titration, mL;
V 0 ——the amount of sodium nitrite standard solution used in the blank experiment, mL;
c—— The molar concentration of sodium nitrate standard solution, mol/L;
G——The mass of the sample, g
.
When the difference between the two measurement results is within 0.
4%, take the average value as the measurement result
.
9.
Product use
H acid monosodium salt is one of the important dye intermediates, used as intermediates for direct dyes, acid dyes, and reactive dyes
.
For example, it is used to manufacture direct lake blue 5B, direct blue 2B, acid fuchsine 6B, acid scarlet G, acid red 3B, acid black 10B, acid black ATY, acid vermilion 105, reactive violet X-2R, reactive brilliant red K- 2BP, K-10B, Reactive Violet K-3R, Reactive Dark Blue KR, Reactive Black K-BR, Reactive Brilliant Red M-2B, M-8B, Reactive Dark Blue MR, Reactive Gray M-4R, Reactive Black M-2R, Reactive Red KD-8B, KD-G, reactive dark blue KD-7G
10.
Security measures
(1) Naphthalene, fuming sulfuric acid , nitric acid, caustic soda and other toxic or corrosive raw materials are used in production.
The reaction equipment should be sealed, the operators should wear labor protection equipment, and the workshop should maintain good ventilation
.
(2) The products are packed in wooden or iron drums lined with plastic bags
.
Store in a cool, ventilated, dry warehouse, away from fire, heat sources, prevent sunlight, avoid heat and moisture, and store and transport in accordance with the regulations for toxic chemicals
Related links: Product performance of 1-amino-8-naphthol-3,6-disulfonic acid monosodium salt
