ChemicalBook Product Catalog Organic Chemistry Amides Amino compound 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid

1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid

1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid Basic information
Product Name:1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid
Synonyms:4-amino-5-hydroxy-7-naphthalenedisulfonicacid;7-Naphthalenedisulfonicacid,4-amino-5-hydroxy-2;c.i.35570;1-Naphthol-8-amino-3,6-disulfonicacid;kyselina1-amino-8-naftol-3,6-disulfonova;1-AMINO-8-NAPHTHOL-3,6-DISULFONIC ACID;4-AMINO-5-HYDROXY-2,7-NAPTHALENEDISULFONIC ACID;4-AMINO-5-HYDROXY-2,7-NAPHTHALENEDISULFONIC ACID
CAS:90-20-0
MF:C10H9NO7S2
MW:319.31
EINECS:201-975-7
Product Categories:Intermediates of Dyes and Pigments;OLED materials,pharm chemical,electronic
Mol File:90-20-0.mol
1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid Structure
1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid Chemical Properties
Melting point >300 °C(lit.)
density 1.6832 (rough estimate)
refractive index 1.7640 (estimate)
solubility DMSO (Slightly, Heated), Methanol (Slightly), Water (Slightly)
pka-0.95±0.40(Predicted)
form Solid
color Light Beige to Beige
CAS DataBase Reference90-20-0(CAS DataBase Reference)
EPA Substance Registry System2,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy- (90-20-0)
Safety Information
Hazard Codes Xi
Risk Statements 36/37/38
Safety Statements 26-36
WGK Germany 3
HS Code 2922210060
MSDS Information
1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid Usage And Synthesis
Uses4-Amino-5-hydroxy-2,7-naphthalenedisulfonic Acid is useful for preparing reactive dyes.
Purification MethodsA slightly alkaline solution of Na2CO3 (ca 22g) in water (litmus) is added to a solution of 100g of the dry acid in 750mL of hot distilled water, followed by 5g of activated charcoal and 5g of Celite. The suspension is stirred for 10minutes and filtered by suction. The acid is then precipitated by adding ca 40mL of conc HCl (solution is blue to Congo Red), then filter it by suction through a shark skin filter circular sheet (or hardened filter paper) and wash it with 100mL of distilled water. The purification process is repeated. The acid is dried overnight in an oven at 60o and stored in a dark bottle The diethylamine salt has m 306-307o(dec, from aqueous EtOH). [Post & Moore Anal Chem 31 1872 1959]. [Beilstein 14 H 840, 14 I 758, 14 II 502, 14 III 2292, 14 IV 2824.]
Nickel bis(sulphamidate) Sulfanilic acid 3-amino-8-hydroxynaphthalene-1,5-disulphonic acid, sodium salt Sulfamic acid monosodium salt 4-Amino-benzenesulfonic acid monosodium salt Ammonium sulfamate AZOMETHINE H Glycine 4-[(2,4-dichlorobenzoyl)amino]-5-hydroxynaphthalene-1,7-disulphonic acid 2-Amino-8-naphthol-3,6-disulfonic acid monopotassium Sulfamic acid 4-[[(3-aminophenoxy)acetyl]amino]-5-hydroxynaphthalene-1,7-disulphonic acid 4-[(3-aminobenzoyl)amino]-5-hydroxynaphthalene-2,7-disulphonic acid 6,6'-[vinylenebis[(3-sulpho-p-phenylene)azo]]bis[4-amino-5-hydroxynaphthalene-1,3-disulphonic] acid, sodium salt 1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid 8-Amino-1-naphthol-3,6-disulfonic acid monosodium salt monohydrate Molasses 2-Amino-8-naphthol-3,6-disulfonic acid monosodium salt
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