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2-Pyrazinecarboxylic acid

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Name

2-Pyrazinecarboxylic acid

EINECS 202-718-1
CAS No. 98-97-5 Density 1.403 g/cm3
PSA 63.08000 LogP 0.17480
Solubility soluble in cold water Melting Point 222-225 °C
Formula C5H4N2O2 Boiling Point 313.1 °C at 760 mmHg
Molecular Weight 124.099 Flash Point 143.1 °C
Transport Information N/A Appearance white to off-white crystalline powder
Safety 22-24/25-45-36/37/39-26-16 Risk Codes 11-34
Molecular Structure Molecular Structure of 98-97-5 (2-Pyrazinecarboxylic acid) Hazard Symbols IrritantXi,CorrosiveC,FlammableF
Synonyms

Piazinecarboxylic acid;pyrazine-2-carboxylate;Pyrazine-2-carboxylic acid;Pyrazinemonocarboxylic acid;2- Piperazine carboxylic;Pyrazinecarboxylic acid;Paradiazinecarboxylic acid;2-Pyrazinoic acid;Pyrazinoate;2-Pyrazine carboxylic acid;Pyrazinoic acid;Pyrazinic acid;Pyazine-2-carboxylic acid;

Article Data 41

2-Pyrazinecarboxylic acid Synthetic route

89-01-0

2,3-dicarboxypyrazine

98-97-5

2-pyrazylcarboxylic acid

Conditions
ConditionsYield
With sulfuric acid; acetic acid for 2h; Heating;85%
at 210℃; under 3 - 4 Torr;
With water; toluene
With nitrobenzene
109-08-0

2-Methylpyrazine

98-97-5

2-pyrazylcarboxylic acid

Conditions
ConditionsYield
With 18-crown-6 ether; potassium tert-butylate; oxygen In 1,2-dimethoxyethane at 60℃; under 3800 Torr; for 24h;64%
In water Ambient temperature; electrochemical oxidation on activated nickel hydroxide anode;60%
With selenium(IV) oxide In acetic acid for 0.0833333h; Heating; microwave;50%
123-32-0

2,5-dimethyl-pyrazine

A

98-97-5

2-pyrazylcarboxylic acid

B

5521-55-1

2-methylpyrazin-5-carboxylic acid

C

122-05-4

2,5-pyrazinedicarboxylic acid

Conditions
ConditionsYield
With cobalt(II) nitrate In water Ambient temperature; electrochemical oxidation on activated nickel hydroxide anode;A 2%
B 42%
C 3%
In water Ambient temperature; electrochemical oxidation on activated nickel hydroxide anode;A 12%
B 22%
C 5%
With chromium(III) nitrate In diethyl ether Product distribution; Ambient temperature; electrochemical oxidation; var. additives, var. reaction time vs. conversion;
13925-00-3

2-ethylpyrazine

98-97-5

2-pyrazylcarboxylic acid

Conditions
ConditionsYield
With potassium permanganate
With potassium permanganate In water at 20℃;
13481-25-9

pyrazine-2,3-dicarbonitrile

98-97-5

2-pyrazylcarboxylic acid

Conditions
ConditionsYield
With hydrogenchloride
122-05-4

2,5-pyrazinedicarboxylic acid

A

290-37-9

1,4-pyrazine

B

98-97-5

2-pyrazylcarboxylic acid

C

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

methylammonium carbonate

Conditions
ConditionsYield
at 282℃;
89-01-0

2,3-dicarboxypyrazine

A

290-37-9

1,4-pyrazine

B

98-97-5

2-pyrazylcarboxylic acid

Conditions
ConditionsYield
Destillation im Vakuum;
bei der Destillation im Vakuum;
103150-78-3

diethyl pyrazine-2,5-dicarboxylate

A

290-37-9

1,4-pyrazine

B

98-97-5

2-pyrazylcarboxylic acid

Conditions
ConditionsYield
rasche Destillation;
6924-68-1

ethyl 2-pyrazinecarboxylate

98-97-5

2-pyrazylcarboxylic acid

Conditions
ConditionsYield
With alkaline H2O In dimethyl sulfoxide at 30℃; Rate constant; other solvent (EtOH); variation of water concentrations;
109-08-0

2-Methylpyrazine

aqueous permanganate solution

aqueous permanganate solution

98-97-5

2-pyrazylcarboxylic acid

2-Pyrazinecarboxylic acid Chemical Properties

IUPAC Name: Pyrazine-2-carboxylic acid
Synonyms of 2-Pyrazinecarboxylic acid (CAS NO.98-97-5): Pyrazinoic acid ; Pyrazine-2-carboxylic acid
CAS NO: 98-97-5
Molecular Formula: C5H4N2O2
Molecular Weight: 93.55
Molecular Structure:
EINECS: 202-718-1
H bond acceptors: 4
H bond donors: 1
Freely Rotating Bonds: 1
Polar Surface Area: 52.08 Å2
Index of Refraction: 1.578
Molar Refractivity: 29.36 cm3
Molar Volume: 88.4 cm3
Surface Tension: 72.1 dyne/cm
Density: 1.403 g/cm3
Flash Point: 143.1 °C
Enthalpy of Vaporization: 58.5 kJ/mol
Boiling Point: 313.1 °C at 760 mmHg
Vapour Pressure: 0.000217 mmHg at 25°C
Melting point: 222-225 °C
Water solubility: soluble in cold water
Appearance: white to off-white crystalline powder
SMILES: O=C(O)c1nccnc1
InChI: InChI=1/C5H4N2O2/c8-5(9)4-3-6-1-2-7-4/h1-3H,(H,8,9)
InChIKey: NIPZZXUFJPQHNH-UHFFFAOYAS
Std. InChI: InChI=1S/C5H4N2O2/c8-5(9)4-3-6-1-2-7-4/h1-3H,(H,8,9)
Std. InChIKey: NIPZZXUFJPQHNH-UHFFFAOYSA-N
Product Categories of 2-Pyrazinecarboxylic acid (CAS NO.98-97-5): Fluorobenzene;Carboxylic Acids;Pyrazines, Pyrimidines & Pyridazines;Pyrazine;Organic acids;Pyrazinecarboxylic Acid & Derivatives;Pyrazines;Carboxylic Acids;Pyrazines, Pyrimidines & Pyridazines;Building Blocks;Heterocyclic Building Blocks

2-Pyrazinecarboxylic acid Safety Profile

Safety Information about 2-Pyrazinecarboxylic acid (CAS NO.98-97-5):
Hazard Codes: IrritantXi,CorrosiveC,FlammableF
Risk Statements: 11-34
R11: Highly flammable. 
R34: Causes burns.
Safety Statements: 22-24/25-45-36/37/39-26-16
S16: Keep away from sources of ignition. 
S22: Do not breathe dust. 
S24/25: Avoid contact with skin and eyes. 
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 the label whenever possible.)
WGK Germany: 3
HS Code: 29339990

2-Pyrazinecarboxylic acid Specification

General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
Extinguishing Media: In case of fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. 
Handling: Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Avoid ingestion and inhalation.
Storage: Store in a cool, dry place. Keep container closed when not in use.

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