8-Aminonaphthalene-1,6-disulfonic acid
- CAS NO.:129-91-9
- Empirical Formula: C10H9NO6S2
- Molecular Weight: 303.31
- MDL number: MFCD00021548
- EINECS: 204-969-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2023-11-03 13:54:03
What is 8-Aminonaphthalene-1,6-disulfonic acid?
Chemical properties
1-Aminonaphthalene-3,8-disulfonic acid [129-91-9]. (8-aminonaphthalene-1,6- disulfonic acid), amino epsilon acid, C10H9NO6S2, Mr 303.3, and its sodium salt are very soluble in water, but the barium salt is only sparingly soluble. Reduction with zinc and alkali (or with sodium amalgam) desulfonates to give 1-aminonaphthalene-3-sulfonic acid. The amino group is hydrolyzed by water at 180℃ to give 1-hydroxynaphthalene-3,8-disulfonic acid. Caustic fusion results in 1-amino-8-hydroxynaphthalene-3-sulfonic acid, whereas reaction with 10 % sodium hydroxide at 250℃ produces 1,8-dihydroxynaphthalene-3-sulfonic acid. Amination produces 1,3-diaminonaphthalene-8-sulfonic acid, but the production of 6,8- di(phenylamino)naphthalene-1-sulfonic acid (diphenyl epsilon acid) by reaction with aniline is more important.
The Uses of 8-Aminonaphthalene-1,6-disulfonic acid
Amino e acid is used mainly as an intermediate rather than as a color component, but the derived diphenyl e acid is used for safranine dyes such as C.I. Acid Blue 61.
Production Methods
Naphthalene is sulfonated under conditions that give predominately the 1,6- disulfonic acid. The sulfonation mass is nitrated with H2SO4–HNO3 at 30 – 40 ℃. After addition of dolomite and neutralization with lime, the liquor is reduced with iron and basified with magnesia, and the iron residues are removed. Careful adjustment of temperature and acidity precipitates the product as the acid magnesium salt, which is purified by dissolution in aqueous sodium carbonate and removal of magnesium carbonate; the diacid is precipitated with acid in 32 % overall yield.
Properties of 8-Aminonaphthalene-1,6-disulfonic acid
Density | 1.769±0.06 g/cm3(Predicted) |
storage temp. | Keep in dark place,Inert atmosphere,Room temperature |
pka | -1.03±0.40(Predicted) |
CAS DataBase Reference | 129-91-9(CAS DataBase Reference) |
EPA Substance Registry System | 1,6-Naphthalenedisulfonic acid, 8-amino- (129-91-9) |
Safety information for 8-Aminonaphthalene-1,6-disulfonic acid
Signal word | Danger |
Pictogram(s) |
Exclamation Mark Irritant GHS07 Health Hazard GHS08 Environment GHS09 |
GHS Hazard Statements |
H302:Acute toxicity,oral H372:Specific target organ toxicity, repeated exposure H410:Hazardous to the aquatic environment, long-term hazard |
Precautionary Statement Codes |
P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P270:Do not eat, drink or smoke when using this product. P273:Avoid release to the environment. P330:Rinse mouth. P301+P312:IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell. |
Computed Descriptors for 8-Aminonaphthalene-1,6-disulfonic acid
Abamectin manufacturer
PARAGON FINE AND SPECIALITY CHEMICAL PVT LTD
New Products
2,2-diethoxyethanethioamide Tubulysin A (R)-tert-butyl (4-methyl-1-oxopentan-3-yl)carbamate (2S,4R)-4-amino-2-methyl-5-phenylpentanoic acid hydrochloride 3-FLUOROPYRROLIDINE HYDROCHLORIDE 4-CYANO-TETRAHYDROPYRAN-4-CARBOXYLIC ACID 2-(azetidin-3-ylidene)acetonitrile (hydrochloride) 1-(1,1-Difluoroethyl)-2-fluorobenzene 2H-Pyran, 4-ethynyltetrahydro- 1,2,3,6-TETRAHYDROPYRIDINE HYDROCHLORIDE 2-[2-[3(S)-3[2-(7-chloro-2-quinolinyl) ethenyl] phenyl-3- hydroxyl propyl] phenyl]-2-propanol Fuel shell Calcium Sodium Phosphosilicate IH 2-[[(3aR,4S,6R,6aS)-6-Aminotetrahydro-2,2-dimethyl-4H-cyclopenta-1,3-dioxol-4-yl]oxy]ethanol ethanedioate 2-(1-(Mercaptomethyl) cyclopropyl) acetonitrile Imeglimin Hydrochloride IH Lubiprostone Magnesium Trisilicate Latanoprostene Bunod Flame Retardant Zinc Borate methyl 3-fluoro-4- thiomorpholino phenylcarbamate (R)-(3-(3-fluoro-4- thiomorpholinophenyl)-2- oxooxazolidin-4-yl) methyl methanesulfonate 7-Methoxyquinoline-4-carboxylic acid 7-Methoxyquinoline-4-carbonitrileRelated products of tetrahydrofuran
You may like
-
129-91-9 8-Aminonaphthalene-1,6-disulfonic acid 99%View Details
129-91-9 -
(R)-(3-(3-fluoro-4- thiomorpholinophenyl)-2- oxooxazolidin-4-yl) methyl methanesulfonateView Details
2416850-45-6 -
methyl 3-fluoro-4- thiomorpholino phenylcarbamateView Details
2760359-22-4 -
Fuel shell 98%View Details
-
4,6-dichloro-2-propylthiopyrimidine-5-amine 145783-15-9 98%View Details
145783-15-9 -
151767-02-1 Montelukast Sodium IP/USP 98%View Details
151767-02-1 -
Valacyclovir Hydrochloride IH 98%View Details
124832-27-5 -
2-[2-[3(S)-3[2-(7-chloro-2-quinolinyl) ethenyl] phenyl-3- hydroxyl propyl] phenyl]-2-propanol 98%View Details
142569-70-8