| Identification | More | [Name]
3-Hydroxy-2-naphthoic acid | [CAS]
92-70-6 | [Synonyms]
2-HYDROXY-3-NAPHTHOIC ACID
2-HYDROXY-3-NAPHTHOYL ACID
2-NAPHTHOL-3-CARBOXYLIC ACID
3-HYDROXY-2-NAPHTHALENECARBOXYLIC ACID
3-HYDROXY-2-NAPHTHOIC ACID
3-HYDROXYNAPHTHALENE-2-CARBOXYLIC ACID
3-HYDROXYNAPTHALENE-2-CARBOXYLIC ACID
BETA-HYDROXYNAPHTHOIC ACID
BETA-OXY NAPHTHOIC ACID
BON
BON ACID
B-OXYNAPHTHOIC ACID
β-Hydroxy-naphthoic acid
Oxynaphthoic acid
2-Hydroxy-3-naphthalenecarboxylic acid
2-hydroxy-3-naphthalenecarboxylicacid
2-Hydroxy-3-napthoic acid
2-Naphthalenecarboxylicacid,3-hydroxy-
2-Naphthoic acid, 3-hydroxy-
3-hydroxy-2-naphthalene | [EINECS(EC#)]
202-180-8 | [Molecular Formula]
C11H8O3 | [MDL Number]
MFCD00004103 | [Molecular Weight]
188.18 | [MOL File]
92-70-6.mol |
| Chemical Properties | Back Directory | [Appearance]
yellow to beige-brown fine crystalline powder | [Melting point ]
218-221 °C(lit.)
| [Boiling point ]
283.17°C (rough estimate) | [density ]
1.43 g/cm3 (23℃) | [refractive index ]
1.7160 (estimate) | [Fp ]
>150°C | [storage temp. ]
Sealed in dry,Room Temperature | [solubility ]
0.072g/l practically insoluble | [form ]
Fine Crystalline Powder | [pka]
3.02±0.30(Predicted) | [color ]
Yellow to beige-brown | [Water Solubility ]
PRACTICALLY INSOLUBLE | [λmax]
395nm(H2O (pH 3.5))(lit.) | [Detection Methods]
T,NMR | [Merck ]
14,4835 | [BRN ]
744100 | [Uses]
Dyes and pigments. | [CAS DataBase Reference]
92-70-6(CAS DataBase Reference) | [NIST Chemistry Reference]
2-Naphthalenecarboxylic acid, 3-hydroxy-(92-70-6) | [EPA Substance Registry System]
92-70-6(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
Xn,Xi | [Risk Statements ]
R22:Harmful if swallowed.
R36:Irritating to the eyes.
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 .
S37/39:Wear suitable gloves and eye/face protection . | [WGK Germany ]
1
| [RTECS ]
QL1755000
| [TSCA ]
Yes | [HS Code ]
29182910 | [Hazardous Substances Data]
92-70-6(Hazardous Substances Data) | [Toxicity]
The acute oral LD50 of 3-Hydroxy-2-naphthoic acid in rats was 823-1040 mg/kg bw. |
| Hazard Information | Back Directory | [Hazard]
Irritant. | [Chemical Properties]
yellow to beige-brown fine crystalline powder | [Definition]
ChEBI: 3-Hydroxy-2-naphthoate is a naphthoic acid. | [Preparation]
3 -Hydroxy-2-naphthoic acid is invariably by the Kolbe – Schmitt reaction of carbon dioxide with the dried sodium salt of 2-naphthol at 220 – 260℃. Many improvements in both process and equipment have been developed. The main problems are removal of the 50 % unreacted 2-naphthol and avoidance of a tarry byproduct. Yields of 80 % based on the amount of 2-naphthol consumed are possible despite the low conversion. | [Purification Methods]
Crystallise it from water or acetic acid. The S-benzyisothiuronium salt has m 216-217o (from EtOH). It forms many metal complex salts. [Beilstein 10 H 333, 10 III 1084.] |
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