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5006-66-6

Basic Information
CAS No.: 5006-66-6
Name: 2-Hydroxy-5-pyridinecarboxylic acid
Article Data: 34
Molecular Structure:
Molecular Structure of 5006-66-6 (2-Hydroxy-5-pyridinecarboxylic acid)
Formula: C6H5NO3
Molecular Weight: 139.111
Synonyms: 6-Hydroxy-nicotinic acid;1, 6-Dihydro-6-oxo-3-pyridinecarboxylic acid;6-oxo-1H-pyridine-3-carboxylic acid;3-Pyridinecarboxylic acid, 1,6-dihydro-6-oxo-;Nicotinic acid, 1,6-dihydro-6-oxo-;6-Hydroxy nicotinic acid;6-hydroxy-3-Pyridinecarboxylic acid;2-hydroxy-5-pyridinecarboxlic acid;2-Pyridone-5-carboxylic acid;6-oxo-1H-pyridine-3-carboxylate;Nicotinic acid, 1,6-dihydro-6-oxo- (8CI);6-Hydroxynicotinic acid , 2-Hydroxy-5-pyridinecarboxylic acid;
EINECS: 225-682-9
Density: 1.451 g/cm3
Melting Point: 300 °C(lit.)
Boiling Point: 384 °C at 760 mmHg
Flash Point: 186 °C
Appearance: Off-white powder
Hazard Symbols: IrritantXi
Risk Codes: 36/37/38
Safety: 26-36-24/25
PSA: 70.16000
LogP: 0.07310
Synthetic route
59-67-6

nicotinic acid

5006-66-6

6-hydroxy-3-pyridinecarboxylic acid

Conditions
ConditionsYield
at 35℃; for 45h; Product distribution; production by resting cells of Pseudomonas fluorescens TN5; effects of aeration; optimization of culture medium; effect molybdenum and iron ions and nicotinic acid as inducer on the formation of the hydroxylated enzyme; pH 6.5;98.7%
With potassium hexacyanoferrate(III) Pseudomonas fluorescens TN-5 immobilized electrochemical reactor,salina solution (0.85percent NaCl); under var. conditions;
With potassium hexacyanoferrate(III) Pseudomonas fluorescens TN-5 immobilized electrochemical reactor, salina solution (0.85percent NaCl); Yield given;
121-44-8

triethylamine

5006-66-6

6-hydroxy-3-pyridinecarboxylic acid

Conditions
ConditionsYield
With potassium hydroxide; acetic anhydride In tetrachloromethane79%
2398-81-4

Nicotinic acid N-oxide

108-24-7

acetic anhydride

A

5006-66-6

6-hydroxy-3-pyridinecarboxylic acid

B

609-71-2

2-hydroxy-3-carboxypyridine

C

111068-01-0

3-acetoxy-4-aza-3-methyl-1(3H)-isobenzofuranone 4-oxide

Conditions
ConditionsYield
for 6h; Heating;A 1.5%
B 5.4%
C 62%
2398-81-4

Nicotinic acid N-oxide

A

5006-66-6

6-hydroxy-3-pyridinecarboxylic acid

B

609-71-2

2-hydroxy-3-carboxypyridine

C

111068-01-0

3-acetoxy-4-aza-3-methyl-1(3H)-isobenzofuranone 4-oxide

Conditions
ConditionsYield
With acetic anhydride for 6h; Heating;A 1.5%
B 5.4%
C 62%
26218-80-4

6-methoxy-nicotinic acid methyl ester

5006-66-6

6-hydroxy-3-pyridinecarboxylic acid

Conditions
ConditionsYield
With hexamethyldisilathiane; sodium methylate In various solvent(s) at 180℃; for 24h;55%
142-08-5

2-Pyridone

15719-64-9, 15719-76-3, 97762-63-5

methylammonium carbonate

5006-66-6

6-hydroxy-3-pyridinecarboxylic acid

Conditions
ConditionsYield
With potassium carbonate at 180 - 200℃; under 15200 Torr;
403-45-2

6-fluoronicotinic acid

5006-66-6

6-hydroxy-3-pyridinecarboxylic acid

Conditions
ConditionsYield
With hydrogenchloride
6311-35-9

6-bromonicotinic acid

5006-66-6

6-hydroxy-3-pyridinecarboxylic acid

Conditions
ConditionsYield
With hydrogenchloride
66572-55-2

6-methoxynicotinic acid

A

1628-89-3

2-methoxypyridine

B

5006-66-6

6-hydroxy-3-pyridinecarboxylic acid

59-67-6

nicotinic acid

A

5006-66-6

6-hydroxy-3-pyridinecarboxylic acid

B

609-71-2

2-hydroxy-3-carboxypyridine

Conditions
ConditionsYield
With potassium hydroxide; fluorine In water at 0℃; for 3.5h; Yield given. Yields of byproduct given;
With potassium hydroxide; fluorine In water at 0℃; Yield given. Yields of byproduct given;
With water; oxygen Quantum yield; Further Variations:; pH-values; Reagents; Irradiation;
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  • 5006-66-6            C6H5NO3               2-Hydroxy-5-pyridinecarboxylic acid

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Chemistry

Molecular Structure of 6-Hydroxynicotinic acid (CAS NO.5006-66-6):

IUPAC Name: 6-oxo-1H-pyridine-3-carboxylic acid 
Empirical Formula: C6H5NO3
Molecular Weight: 139.1088
H bond acceptors: 4
H bond donors: 2
Freely Rotating Bonds: 1
Polar Surface Area: 46.61 Å2
Index of Refraction: 1.579
Molar Refractivity: 31.84 cm3
Molar Volume: 95.8 cm3
Surface Tension: 61 dyne/cm
Density: 1.451 g/cm3
Flash Point: 186 °C
Enthalpy of Vaporization: 69.45 kJ/mol
Boiling Point: 384 °C at 760 mmHg
Vapour Pressure: 5.81E-07 mmHg at 25°C
Melting point: >300 °C(lit.)
BRN: 472182
InChI
InChI=1/C6H5NO3/c8-5-2-1-4(3-7-5)6(9)10/h1-3H,(H,7,8)(H,9,10)
Smiles
c1(C(=O)O)cnc(cc1)O
EINECS: 225-682-9
Product Categories: Nitrogen cyclic compounds; blocks; Carboxes; Pyridines; Pyridine; Organic acids

Safety Profile

Hazard Codes: IrritantXi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-24/25
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing. 
S24/25:Avoid contact with skin and eyes.
WGK Germany: 3
Hazard Note: Irritant
TSCA: T
HazardClass: Irritant

Specification

 6-Hydroxynicotinic acid , with CAS number of 5006-66-6, can be called 1,6-dihydro-6-oxo-3-pyridinecarboxylicaci ; 2-Hydroxy-5-pyridinecarboxylic acid ; 2-hydroxypyridine-5-carboxylic acid ; 5-carboxy-2(1h)-pyridinone ; 6-hydroxy-3-pyridinecarboxylic acid ; 6-hydroxynicotinic acid . It is an off-white powder, 6-Hydroxynicotinic acid (CAS NO.5006-66-6) is used as building block in chemical synthesis.