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| | 1-Naphthol-4-sulfonic acid Basic information |
| Product Name: | 1-Naphthol-4-sulfonic acid | | Synonyms: | 1-Naphthalenesulfonicacid,4-hydroxy-;4-hydroxy-1-naphthalenesulfonicaci;4-hydroxynaphthalene-1-sulphonicacid;Nevileandwinther’sacid;N-(M-SULFOPHENYL) GAMMA ACID;4-Hydroxy-1-naphthalenesulfonic acid;1-NAPHTHOL-4-SULFONIC ACID;Nevile-Winthers acid | | CAS: | 84-87-7 | | MF: | C10H8O4S | | MW: | 224.23 | | EINECS: | 201-568-4 | | Product Categories: | Intermediates of Dyes and Pigments | | Mol File: | 84-87-7.mol |  |
| | 1-Naphthol-4-sulfonic acid Chemical Properties |
| Melting point | 170℃ | | Boiling point | 335.63°C (rough estimate) | | density | 1.4643 (rough estimate) | | refractive index | 1.7040 (estimate) | | pka | 0.73±0.40(Predicted) | | form | solid | | form | solid | | color | white to yellow | | InChI | InChI=1S/C10H8O4S/c11-9-5-6-10(15(12,13)14)8-4-2-1-3-7(8)9/h1-6,11H,(H,12,13,14) | | InChIKey | HGWQOFDAUWCQDA-UHFFFAOYSA-N | | SMILES | C1(S(O)(=O)=O)=C2C(C=CC=C2)=C(O)C=C1 | | CAS DataBase Reference | 84-87-7(CAS DataBase Reference) | | EPA Substance Registry System | 1-Naphthalenesulfonic acid, 4-hydroxy- (84-87-7) |
| | 1-Naphthol-4-sulfonic acid Usage And Synthesis |
| Chemical Properties | Transparent flake crystal. soluble in water. | | Uses | 1-Naphthol-4-sulfonic acid is used as an intermediate of azo dyes to prepare dyes such as direct copper blue BR and 2R, direct violet RB, acid red B and acid medium jujube red B | | Preparation | After drying under vacuum, the resulting filter cake contains 1-naphthol-4-sulphonic acid in a yield of 92% of theory and <0.5% 1-naphthol-2-sulphonic acid and 3% of 1-naphthol-2,4-disulphonic acid based on the weight of 1-naphthol-4-sulphonic acid.
| | Synthesis | 1-Naphthol-4-sulfonic acid was synthesized by addition, hydrolysis and acid precipitation of sodium 1,4-aminonaphthalene sulfonate. |
| | 1-Naphthol-4-sulfonic acid Preparation Products And Raw materials |
| Raw materials | Sodium bisulfite-->Naphthionic acid | | Preparation Products | disodium 3-[[4'-[(6-amino-1-hydroxy-3-sulphonato-2-naphthyl)azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-1-sulphonate-->C.I. 14720-->Direct Blue 151-->disodium 3-[[4'-[[6-amino-1-hydroxy-3-sulphonato-2-naphthyl]azo]-3,3'-dimethoxy[1,1'-biphenyl]-4-yl]azo]-4-hydroxynaphthalene-1-sulphonate-->sodium 3-[[4-(benzoylethylamino)-2-methylphenyl]azo]-4-hydroxynaphthalene-1-sulphonate-->sodium 4-hydroxy-3-[[3-(phenylsulphamoyl)-p-tolyl]azo]naphthalenesulphonate-->3-[(5-Chloro-2-hydroxy-3-sulfophenyl)azo]-4-hydroxy-1-naphthalenesulfonic acid disodium salt-->5-Amino-4-hydroxy-3-[[4'-[(1-hydroxy-4-sulfonaphthalen-2-yl)azo]-3,3'-dimethyl[1,1'-biphenyl]-4-yl]azo]-2,7-naphthalenedisulfonic acid trisodium salt-->Acid Red 374-->4,4'-[(2-Methyl-5-sodiosulfo-1,3-phenylene)bis[azo(4,6-diamino-3,1-phenylene)azo]]bis[naphthalene-1-sulfonic acid sodium] salt-->BENZOAZURINE-->BRILLIANT PURPURIN R-->THIAZINE RED-->Acid Violet 131-->NAPHTHALENE SCARLET B-->Aluminium, 7-hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-1,3-naphthalenedisulfonic acid complex-->Mordant Violet 2-->DIRECTVIOLET32-->disodium (3Z)-3-[[4-(4-anilino-3-sulfonato-phenyl)diazenylnaphthalen-1-yl]hydrazinylidene]-4-oxo-naphthalene-1-sulfonate-->3-[[2-[(N-Ethyl-N-phenylamino)sulfonyl]phenyl]azo]-4-hydroxy-1-naphthalenesulfonic acid sodium salt-->6-Amino-4-hydroxy-5-[[4'-[(1-hydroxy-4-sodiosulfo-2-naphthalenyl)azo]-1,1'-biphenyl-4-yl]azo]naphthalene-2-sulfonic acid sodium salt-->OXAMINE BLUE 4R |
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