1-amino-8-naphthol-3,6-disulfonic acid
Chinese name: H acid; 1-Amino-8-naphthol -3 ,6-disulfonic acid
English name: 1-amino-8-naphthol-3 ,6-disulfonic acid
H-acid is a chemical substance that is mainly used for the production of acidic, direct and reactive dyes such as acidic magenta 6B, acidic red G, acidic black 10B, direct black, active bright red K-2BP, active purple K-3R, and active solution. More than 90 species such as blue K-R, These dyes are used for dyeing wool and cotton fabrics. It can also be used to produce drugs.
Slightly soluble in cold water, soluble in alkaline solutions such as soda and caustic soda.
[Use]
H-monodium acid salt
[Preparation or source]
The disodium salt and caustic soda concentrated solution of Koch acid(1-naphthalamine-3 ,6,8-trisulfonic acid) are heated and melted at about 180-190 °C in the heat collector, and then the melt is dissolved in water. Acidification results.
【 Other】
The action with the ferric chloride solution is brown-red. The acid salt has a red fluorescence with blue microstrip and turns reddish purple after adding alkali. H-acid products are generally paste or powder.
CAS No. :: 90-20-0
Standard | Test Result | |
Name | 1-amino-8-naphthol-3,6-disulfonic acid | |
CAS No. | 5460-09-3 | |
Appearance: | White to gray | White to gray |
Purity: % | m.w 319 80 min | 81.04 |
m.w 341 85 min | 86.63 | |
HPLC: % | ≥98 | 98.92 |
Chromotropic acid % | ≤1.0 | 0.43 |
ω acid % | ≤ 0.2 | 0.01 |
T acid % | ≤ 0.5 | 0.25 |
K acid % | ≤ 0.2 | 0.01 |
Impurity matter % | ≤ 3.0 | 1.08 |
Insoluble matter % | ≤ 0.2 | 0.17 |
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