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7.
Product Standard
8.
Quality inspection
The content is determined as follows:
(1) Preparation of 0.
04mol/L meta-nitroaniline diazonium salt
.
Accurately weigh 13.
(2) Calibration of m-nitroaniline diazonium salt
.
Use a pipette to accurately suck 50mL of 0.
In the formula: c 1 -the molar concentration of sodium nitrite, mol/L;
V—Volume of sodium nitrite solution consumed during titration, mL;
V 2 —The volume of the m-nitroaniline hydrochloride solution drawn, mL
.
(3) Determination
.
Accurately weigh 10g of 2,3-dihydroxynaphthalene-6-sodium sulfonate sample (weigh to 0.
0004g), dissolve it in hot water and cool it to room temperature in a 500mL volumetric flask, then dilute to the mark, and draw 20mL of the above solution In a 400mL beaker, add 100mL of 2mol/L sodium acetate solution, cool with ice to 0～5℃, titrate with 0.
Where: V—volume of m-nitroaniline diazonium salt solution consumed during titration, mL;
c—The molar concentration of diazonium salt of m-nitroaniline, moL/L;
G—The mass of the sample, g
.
9.
Product use
Dye intermediate, also used as a coupling agent for diazo photosensitive paper (used to make blueprints)
10.
(1) Store and transport in accordance with general chemical regulations
(2) Packed in iron drum lined with plastic bag, stored in a cool, ventilated and dry place, protected from moisture, fire and sunlight
