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4-Amino-1-naphthalene sulfonic acid;1-Naphthylamine-4-sulfonic acid;Naphthionic acid;Pirias acid
Molecular formula : C10H9NO3S
MW : 223.25
CAS No. :84-86-6

nature : needle-shaped crystal, containing 1 / 2 molecular crystal water. The relative density of 1.673 (25 / 4 ° C) water-soluble, with blue fluorescence. Sodium soluble in water.

Preparation : naphthylamine sulfonated 4-amino-1-naphthyl sulfonic acid, and were derived sodium. The reaction in the solvent for three chlorobenzene, the reaction temperature is 185-190 ° C, control vacuum 2.67 - 5.33, insulation reaction 3.5h, sampling inspection terminal. After passing the cooling to 150 ° C, which increases soda and controlled pH = 8-9. In the 70-80 ° C, and in liquid with carbolic acid and sodium sulfide, warming up to 90-95 ° C after rested, stratification. The upper material condensed liquid by cooling, crystallization, centrifugal dynamics namely sodium products. The yield of 83%. Class 3 chlorobenzene washed by the recovery quote.

purposes : dye intermediates. Used in the manufacture of acidic red A, B, acidic red 3R, direct red 4B, direct GB large purplish red, purplish red B directly, and for the production of 1-naphthol-4-sulfonic acid and other intermediates.


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Structure:
More Detailed Data:
1) 4-aminonaphthalene-1-sulfonic acid;1-naphthylamine-4-sulfonic acid;naphthionic acid;Piria's acid
2) 4-aminonaphthalene-1-sulfonic acid;1-naphthylamine-4-sulfonic acid;Piria`s acid
3) 1-naphthylamine -4-acid
4) sodium 1-naphthylamine-4-sulfonate;sodium 4-amino-1-naphthalenesulfonate
5) 1-naphthylamine
6) 1-naphthylamine
7) .alpha.-Naphthylamine;1-Naphthalenamine;.alpha.-Aminonaphthalene;1-naphthylamine;1-aminonaftalen;1-aminonaftalen (czech);1-aminonaphthalene
8) 1-naphthylamine
9) 1-Amino-4-naphthalene sulfonic acid sodium
10) Naphthylamine
Notice Some description was translated by software and the data is only as a reference.
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