7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
- CAS NO.：119-40-4
- Empirical Formula: C16H13NO4S
- Molecular Weight: 315.34
- MDL number: MFCD00035714
- EINECS: 204-320-3
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-12-31 14:38:37
What is 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid?
Chemical properties
Blue-gray crystals. Soluble in alkali, insoluble in organic solvent. 4-Hydroxy-7-phenylaminonaphthalene-2- sulfonic acid [119-40-4] N-phenyl J acid, is produced by reaction of J acid with aniline in aqueous sodium bisulfite at reflux for 40 h (yield 85 %). It is used to produce C.I. Direct Violet 7, C.I. Direct Violet 9, C.I. Direct Violet 51, C.I. Direct Blue 78, and C.I. Direct Blue 168.
The Uses of 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
7-Anilino-4-hydroxy-2-naphthalenesulfonic acid is a dye intermediate, which is used to synthesize azo dyes such as direct copper salt green BTL, copper salt blue FBGL and copper salt purple BBL.
Flammability and Explosibility
Non flammable
Synthesis
7-Anilino-4-hydroxy-2-naphthalenesulfonic acid was synthesized from the condensation of J acid and aniline in the medium of sodium bisulfite.
Properties of 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
| Density | 1.495±0.06 g/cm3(Predicted) |
| form | powder to crystal |
| pka | -0.18±0.40(Predicted) |
| color | White to Gray to Brown |
| Water Solubility | 587.97mg/L at 25℃ |
| CAS DataBase Reference | 119-40-4(CAS DataBase Reference) |
| EPA Substance Registry System | 4-Hydroxy-7-(phenylamino)-2-naphthalenesulfonic acid (119-40-4) |
Safety information for 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 7-Anilino-4-hydroxy-2-naphthalenesulfonic acid
7-Anilino-4-hydroxy-2-naphthalenesulfonic acid manufacturer
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