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CAS No.: | 87-02-5 |
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Name: | J acid |
Article Data: | 9 |
Molecular Structure: | |
Formula: | C10H9NO4S |
Molecular Weight: | 239.252 |
Synonyms: | 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-;7-amino-4-hydroxynaphthalene-2-sulfonic acid;Kyselina 2-amino-5-naftol-7-sulfonova;Kyselina 6-amino-1-naftol-3-sulfonova;2-Amino-5-naphthol-7-sulfonic acid;Aminonaphthol sulfonic acid J;Isogamma acid;BRN 2217192;CCRIS 8989;NSC 31510;Kyselina I; |
EINECS: | 201-718-9 |
Density: | 1.627 g/cm3 |
Solubility: | Soluble in hot water, soda ash and caustic soda |
Appearance: | White needle crystal |
Hazard Symbols: | C |
Risk Codes: | 34 |
Safety: | 26-27-36/37/39 |
Transport Information: | UN 2585 8/PG 3 |
PSA: | 109.00000 |
LogP: | 3.03630 |
Conditions | Yield |
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durch Alkalischmelze; | |
With alkali at 180℃; |
Conditions | Yield |
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With sodium hydroxide anschliessend Erhitzen mit wss. Ammoniak und Schwefeldioxid; |
Conditions | Yield |
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at 160 - 180℃; |
pyridine
1-hydroxy-6-amino-3-naphthalenesulfonic acid
acetic anhydride
7-(acetylamino)-4-acetyloxynaphthalene-2-sulfonic acid pyridinium salt
Conditions | Yield |
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at 20℃; for 16h; | 99% |
1-hydroxy-6-amino-3-naphthalenesulfonic acid
Conditions | Yield |
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Stage #1: 7-amino-4-hydroxy-2-naphthalenesulfonic acid With hydrogenchloride; sodium nitrite In water at 0 - 5℃; for 1h; Stage #2: 7-amino-4-hydroxy-2-naphthalenesulfonic acid In water at 0 - 5℃; for 2h; pH=8 - 9; | 93.2% |
bis(trichloromethyl) carbonate
1-hydroxy-6-amino-3-naphthalenesulfonic acid
AMI-1
Conditions | Yield |
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With sodium hydroxide at 60℃; for 6h; pH=7 - 8; | 90% |
bis(trichloromethyl) carbonate
1-hydroxy-6-amino-3-naphthalenesulfonic acid
Conditions | Yield |
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With sodium hydroxide; sodium acetate In tetrahydrofuran; water | 88% |
With sodium acetate In tetrahydrofuran; sodium hydroxide; water |
Conditions | Yield |
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Stage #1: C7H5F2NO With hydrogenchloride; sodium nitrite In water at 0 - 5℃; Stage #2: 7-amino-4-hydroxy-2-naphthalenesulfonic acid With sodium carbonate In water at 0 - 5℃; for 0.666667h; pH=7.5 - 8.5; | 85% |
1-hydroxy-6-amino-3-naphthalenesulfonic acid
diphenyl (4'-aminobiphenyl-4-ylamino)(pyridin-3-yl)methylphosphonate
7-amino-8-((4'-((diphenoxyphosphoryl)(pyridin-3-yl)methylamino)biphenyl-4-yl)diazenyl)-4-hydroxynaphthalene-2-sulfonic acid
Conditions | Yield |
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Stage #1: diphenyl (4'-aminobiphenyl-4-ylamino)(pyridin-3-yl)methylphosphonate With hydrogenchloride; sodium nitrite In water at 0℃; Stage #2: 7-amino-4-hydroxy-2-naphthalenesulfonic acid With sodium hydroxide In water at 0℃; for 0.5h; | 83% |
Conditions | Yield |
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Stage #1: C8H8FNO2 With hydrogenchloride; sodium nitrite In water at 0 - 5℃; Stage #2: 7-amino-4-hydroxy-2-naphthalenesulfonic acid With sodium carbonate In water at 0 - 5℃; for 0.666667h; pH=7.5 - 8.5; | 83% |
The 7-Amino-4-hydroxy-2-naphthalene sulfonic acid with CAS registry number of 87-02-5 is also known as 2-Naphthalenesulfonic acid, 7-amino-4-hydroxy-. The IUPAC name is 7-Amino-4-hydroxynaphthalene-2-sulfonic acid. It belongs to product categories of Intermediates of Dyes and Pigments. Its EINECS registry number is 201-718-9. In addition, the formula is C10H9NO4S and the molecular weight is 239.25. This chemical is a white needle crystal and should be sealed in cool, clean and dark room.
Physical properties about 7-Amino-4-hydroxy-2-naphthalene sulfonic acid are: (1)ACD/LogP: -1.46; (2)ACD/LogD (pH 5.5): -4.93; (3)ACD/LogD (pH 7.4): -4.98; (4)ACD/BCF (pH 5.5): 1; (5)ACD/BCF (pH 7.4): 1; (6)ACD/KOC (pH 5.5): 1; (7)ACD/KOC (pH 7.4): 1; (8)#H bond acceptors: 5; (9)#H bond donors: 4; (10)#Freely Rotating Bonds: 3; (11)Index of Refraction: 1.748; (12)Molar Refractivity: 59.8 cm3; (13)Molar Volume: 147 cm3; (14)Surface Tension: 86.4 dyne/cm; (15)Density: 1.627 g/cm3.
Preparation of 7-Amino-4-hydroxy-2-naphthalene sulfonic acid: it is prepared by reaction of 2-naphthylamine-1-acid. Firstly, 2-naphthaleneate-5,7-disulfonmonosodiumate is obtained by sulfonation and hydrolysis. Then the reactant is melted in alkali and acidified to get product.
Uses of 7-Amino-4-hydroxy-2-naphthalene sulfonic acid: it is used as dye intermediate and also used to produce 7-amino-3-(3-{4-[2-(2,4-dichloro-phenyl)-vinyl]-phenyl}-2-mercapto-4-oxo-3,4-dihydro-quinazolin-6-ylazo)-4-hydroxy-naphthalene-2-sulfonic acid by reaction with 3-{4-[2-(2,4-dichloro-phenyl)-vinyl]-phenyl}-2-mercapto-4-oxo-3,4-dihydro-quinazoline-6-diazonium. The reaction occurs with reagents Na2CO3, NaCl and solvent H2O. The yield is about 79%.
When you are using this chemical, please be cautious about it. As a chemical, it can cause burns. During using it, wear suitable protective clothing, gloves and eye/face protection. After using it, take off immediately all contaminated clothing. If contact with eyes accidently, rinse immediately with plenty of water and seek medical advice.
You can still convert the following datas into molecular structure:
1. Canonical SMILES: C1=CC2=C(C=C(C=C2C=C1N)S(=O)(=O)O)O
2. InChI: InChI=1S/C10H9NO4S/c11-7-1-2-9-6(3-7)4-8(5-10(9)12)16(13,14)15/h1-5,12H,11H2,(H,13,14,15)
3. InChIKey: KYARBIJYVGJZLB-UHFFFAOYSA-N
The toxicity data is as follows:
Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
---|---|---|---|---|---|
rat | LD50 | oral | 11500mg/kg (11500mg/kg) | "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 1057, 1986. |