2-Amino-3,6,8-naphthalenetrisulfonic acid
- CAS NO.：118-03-6
- Empirical Formula: C10H9NO9S3
- Molecular Weight: 383.37
- MDL number: MFCD00035721
- EINECS: 204-229-9
- SAFETY DATA SHEET (SDS)
- Update Date: 2025-12-31 14:38:37
What is 2-Amino-3,6,8-naphthalenetrisulfonic acid?
Chemical properties
2-Aminonaphthalene-3,6,8-trisulfonic acid [118-03-6]. (7-aminonaphthalene-1,3,6- trisulfonic acid), C10H9NO9S3, Mr 383.36, and its disodium salts are soluble in water, but the dipotassium salt is much less soluble. Reduction with zinc dust and alkali results in 2-aminonaphthalene-3,6-disulfonic acid, and caustic fusion at 240℃ gives 2-amino-8-hydroxynaphthalene-3,6-disulfonic acid.
Production Methods
2-Aminonaphthalene-6,8-disulfonic acid is sulfonated with 65 % oleum at 125℃ for 12 h in the presence of anhydrous sodium sulfate. After quenching and liming out, the hot solution of calcium salt is basified with sodium carbonate and the resulting solution of the trisodium salt is used directly for caustic fusion to give 2-amino-8-hydroxynaphthalene-3,6-disulfonic acid.
Flammability and Explosibility
Not classified
Properties of 2-Amino-3,6,8-naphthalenetrisulfonic acid
| Boiling point: | 702.53℃[at 101 325 Pa] |
| Density | 1.7995 (rough estimate) |
| refractive index | 1.6800 (estimate) |
| storage temp. | 2-8°C |
| pka | -1.27±0.40(Predicted) |
| Water Solubility | 1000g/L at 25℃ |
| CAS DataBase Reference | 118-03-6(CAS DataBase Reference) |
| EPA Substance Registry System | 1,3,6-Naphthalenetrisulfonic acid, 7-amino- (118-03-6) |
Safety information for 2-Amino-3,6,8-naphthalenetrisulfonic 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 2-Amino-3,6,8-naphthalenetrisulfonic acid
2-Amino-3,6,8-naphthalenetrisulfonic acid manufacturer
Bhimani Group
Gujarat
Phone:91-8046043512
Whatsapp: 91-8046043512
product: 7-Amino-1,3,6-naphthalenetrisulfonic acid
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