| Identification | More | [Name]
5-Amino-1-naphthalenesulfonic acid | [CAS]
84-89-9 | [Synonyms]
1,5-AMINO ACID
1-AMINO-5-SULFONAPHTHALENE
1-AMINONAPHTHALENE-5-SULFONIC ACID
1-NAPHTHYLAMINE-5-SULFONIC ACID
5-AMINO-1-NAPHTHALENESULFONIC ACID
5-AMINONAPHTHALENE-1-SULFONIC ACID
5-AMINONAPHTHALENE-1-SULPHONIC ACID
5-SULFO-1-NAPHTHYLAMINE
LABOTEST-BB LT01138428
LAURENTS ACID
LAURENT'S ACID
1-aminonaphtalene-5-sulfonicacid
5-amino-1-naphthalenesulfonicaci
laurentacid
Laurens Acid
Laurents acid~1-Naphthylamine-5-sulphonic acid
1-Amino-5-naphthalenesulfonic acid
1-Aminonaphtalene-5-sulfonic acid, 97%+
1-NAPHTHYLAMINE-5-SULFONICACID(LAURENT''SACID)
5-Aminonaphthalene-1-sulfonic acid, tech. 90% | [EINECS(EC#)]
201-571-0 | [Molecular Formula]
C10H9NO3S | [MDL Number]
MFCD00014315 | [Molecular Weight]
223.25 | [MOL File]
84-89-9.mol |
| Chemical Properties | Back Directory | [Melting point ]
>300°C | [Boiling point ]
220°C (rough estimate) | [density ]
1.3588 (rough estimate) | [refractive index ]
1.6500 (estimate) | [solubility ]
Aqueous Base (Slightly), DMSO (Slightly) | [form ]
powder to crystal | [pka]
pK1: 3.69 (25°C) | [color ]
Purple to Dark purple to Dark red | [Water Solubility ]
Soluble in hot water. | [Merck ]
14,6404 | [BRN ]
2214149 | [CAS DataBase Reference]
84-89-9(CAS DataBase Reference) | [EPA Substance Registry System]
84-89-9(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
C | [Risk Statements ]
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed .
R34:Causes burns. | [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 .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) . | [RIDADR ]
UN 2585 8/PG 3
| [WGK Germany ]
3
| [RTECS ]
QK1270500
| [TSCA ]
Yes | [HS Code ]
2921.45.2000 | [HazardClass ]
8 | [PackingGroup ]
III |
| Hazard Information | Back Directory | [Chemical Properties]
?1-Aminonaphthalene-5-sulfonic acid [84- 89-9]. (5-aminonaphthalene-1-sulfonic acid), Laurent’s acid, L acid, Purpurin acid, C10H9NO3S, Mr 223.24, crystallizes from hot water as needles of the monohydrate. The alkalimetal salts are all readily soluble in water. Bromination yields the 2,4-dibromo derivative, vigorous nitration gives 2,4-dinitro-1- hydroxynaphthalene, and sulfonation results in 1-aminonaphthalene-2,5,7-trisulfonic acid. 1- Hydroxynaphthalene-5-sulfonic acid is obtained by heating 104 with aqueous bisulfite (reverseBucherer reaction) or via the diazo compound. Caustic fusion produces 5-amino-1-hydroxynaphthalene. Coupling with diazo compounds takes place in the 2-position. | [Uses]
Intermediate of dyestuff | [Definition]
ChEBI: 5-Amino-1-naphthalenesulfonic acid is a naphthalenesulfonic acid. | [Production Methods]
Laurent’s acid is coproduced with Peri acid as the minor component of a 5:2 isolated product ratio. | [Purification Methods]
Crystallise the acid under nitrogen from boiling water and dry it in a steam oven [Bryson Trans Faraday Soc 47 522, 527 1951]. [Beilstein 14 IV 2800.] |
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