2,3-PYRAZINECARBOXYLIC ANHYDRIDE

Name	2,3-pyrazinedicarboxylic anhydride
Synonyms	Zopiclone Impurity 5 FURO[3,4-B]PYRAZINE-5,7-DIONE 2,3-PYRAZINECARBOXYLIC ANHYDRIDE 2,3-PYRAZINEDICARBOXLIC ANHYDRIDE 2,3-PYRAZINEDICARBOXYLICANHYDRATE 2,3-PYRAZINEDICARBOXYLIC ANHYDRIDE 2,3-pyrazinedicarboxylic anhydride Furo[3,4-b]pyrazine-5,7-dione (9CI) PYRAZINE-2,3-DICARBOXYLIC ANHYDRIDE 2,3-Py Razinedica boxylic Anbyd Yide 2,3-Pyrazinedicarboxylic acid anhydride
CAS	4744-50-7
EINECS	225-260-4
InChI	InChI=1/C6H2N2O3/c9-5-3-4(6(10)11-5)8-2-1-7-3/h1-2H

Molecular Formula	C6H2N2O3
Molar Mass	150.09
Density	1.686±0.06 g/cm3(Predicted)
Melting Point	210°C (dec.)(lit.)
Boling Point	357.3±22.0 °C(Predicted)
Flash Point	169.9°C
Solubility	Actonitrile (Slightly), DMSO
Vapor Presure	2.76E-05mmHg at 25°C
Appearance	Solid
Color	White to light brown crystalline powder
pKa	-3.43±0.20(Predicted)
Storage Condition	Inert atmosphere,Room Temperature
Refractive Index	1.634
MDL	MFCD00179418
Physical and Chemical Properties	crystals. Melting point 223-224 C (210 C decomposition).
Use	An intermediate of pyrazinamide.

Hazard Symbols	Xi - Irritant
Risk Codes	36/37/38 - Irritating to eyes, respiratory system and skin.
Safety Description	S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing.
WGK Germany	3
HS Code	29349990
Hazard Note	Irritant

use	intermediate of pyrazinamide.
production method	o-phenylenediamine can be cycled with glyoxal to form benzopyrazine, which is oxidized to obtain pyrazine dicarboxylic acid, which is eliminated (dehydrated) under the action of acetic anhydride to obtain the product.

Last Update：2024-04-09 20:49:11

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