| Identification | More | [Name]
1-Aminonaphthalene-6-sulfonic acid | [CAS]
119-79-9 | [Synonyms]
1,6-CLEVES ACID
1,6-CLEVE'S ACID
1-amino-6-naphthalenesulfonic acid
1-Amino-6-sulfonaphthalene
1-NAPHTHYLAMINE-6-SULFONIC ACID
5-AMINO-2-NAPHTHALENESULFONIC ACID
5-AMINONAPHTHALENE-2-SULFONIC ACID
ALPHA-NAPHTHYLAMINE-6-SULFONIC ACID
CLEVE'S ACID 1,6
1-Naphthalene-6-sulfonic acid
1-naphthylamine-6-sulfonic
2-Naphthalenesulfonic acid, 5-amino-
2-Naphthalenesulfonicacid,5-amino-
5-amino-2-naphthalenesulfonicaci
5-Naphthylamine-2-sulfonic acid
5-naphthylamine-2-sulfonicacid
cleve’sbeta-acid
Cleve's beta-acid
Kyselina 1-naftylamin-6-sulfonova
Kyselina cleve | [EINECS(EC#)]
257-269-4 | [Molecular Formula]
C10H9NO3S | [MDL Number]
MFCD00004030 | [Molecular Weight]
223.25 | [MOL File]
119-79-9.mol |
| Safety Data | Back Directory | [Risk Statements ]
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection . | [RIDADR ]
1759 | [WGK Germany ]
1
| [RTECS ]
QK1285000
| [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
III | [HS Code ]
29309090 |
| Hazard Information | Back Directory | [Chemical Properties]
Purple Solid | [Uses]
Fluorescent reagent. | [Uses]
Intermediate of dyestuff | [Definition]
ChEBI: 5-aminonaphthalene-2-sulfonic acid is an aminonaphthalenesulfonic acid. | [Production Methods]
Sulfonation of 1-naphthylamine with concentrated sulfuric acid at 130℃ gives mainly 1-aminonaphthalene-6-sulfonic acid. However, the latter is always made, together with the 1,7-isomer, by nitration of naphthalene-2-sulfonic acid to give the mixed 5- and 8- nitronaphthalene-2-sulfonic acids follwed by reduction to ‘‘mixed Cleve’s acids.’’ A b-sulfonation mass is diluted with sulfuric acid, then 67.5 % nitric acid is added slowly at 34℃. After being quenched and neutralized with calcium carbonate, the filtered liquor is reduced by boiling with iron powder, slight acidity being maintained with sulfuric acid. After basification with magnesia the iron residues are filtered off and the filtrate is evaporated until the magnesium salt of the product crystallizes on cooling. Filtration followed by washing with magnesium sulfate gives a 34 % yield of the magnesium salt of 1,6-Cleve’s acid. Purification by dissolution in hot water, acidification, and filtration of the free acid while hot reduce the yield to 25 % based on naphthalene. | [General Description]
The crystal structure of 5-amino-2-naphthalenesulfonic acid (1,6-Cleve′s acid) depicted the presence of a sulfonate-aminium group zwitterion. |
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