天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

ChemicalBook--->CAS DataBase List--->4744-50-7

4744-50-7

4744-50-7 Structure

4744-50-7 Structure
IdentificationMore
[Name]

2,3-Pyrazinecarboxylic anhydride
[CAS]

4744-50-7
[Synonyms]

2,3-PYRAZINECARBOXYLIC ANHYDRIDE
2,3-PYRAZINEDICARBOXYLIC ANHYDRIDE
FURO[3,4-B]PYRAZINE-5,7-DIONE
PYRAZINE-2,3-DICARBOXYLIC ANHYDRIDE
2,3-Pyrazinedicarboxylic acid anhydride
Furo[3,4-b]pyrazine-5,7-dione (9CI)
2,3-PYRAZINEDICARBOXLIC ANHYDRIDE
2,3-PYRAZINEDICARBOXYLICANHYDRATE
5,7-Dihydrofuro[3,4-b]pyrazine-5,7-dione
[EINECS(EC#)]

225-260-4
[Molecular Formula]

C6H2N2O3
[MDL Number]

MFCD00179418
[Molecular Weight]

150.09
[MOL File]

4744-50-7.mol
Chemical PropertiesBack Directory
[Melting point ]

210 °C (dec.)(lit.)
[Boiling point ]

357.3±22.0 °C(Predicted)
[density ]

1.686±0.06 g/cm3(Predicted)
[storage temp. ]

Inert atmosphere,Room Temperature
[solubility ]

Actonitrile (Slightly), DMSO
[form ]

Solid
[pka]

-3.43±0.20(Predicted)
[color ]

White to light brown crystalline powder
[InChI]

InChI=1S/C6H2N2O3/c9-5-3-4(6(10)11-5)8-2-1-7-3/h1-2H
[InChIKey]

AWJWCTOOIBYHON-UHFFFAOYSA-N
[SMILES]

C12C(=O)OC(=O)C1=NC=CN=2
[LogP]

-0.900 (est)
[CAS DataBase Reference]

4744-50-7(CAS DataBase Reference)
Safety DataBack Directory
[Hazard Codes ]

Xi
[Risk Statements ]

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 .
S36:Wear suitable protective clothing .
[WGK Germany ]

3
[Hazard Note ]

Irritant
[HS Code ]

29349990
Raw materials And Preparation ProductsBack Directory
[Raw materials]

o-Phenylenediamine-->Glyoxal-->Quinoxaline
[Preparation Products]

2,3-Pyridinedicarboxylic anhydride-->6-methyl-5H,6H,7H,8H-pyrazino[2,3-d]pyridazine-5,8-dione-->5,8-dichloropyrazino[2,3-d]pyridazine
Hazard InformationBack Directory
[Uses]

2,?3-?Pyrazinedicarboxylic Anhydride is a reagent used in the synthesis of highly potent and selective abietane type diterpenoid amides.
[Synthesis]

Pyrazine-2,3-dicarboxylic acid (4.0 g, 23.8 mmol) was dissolved in acetic anhydride (30 mL).The reaction mixture was refluxed for one hour, and subsequently cooled down to 0 °C in ice bath.The obtained crystals of pyrazine-2,3-dicarboxylic anhydride were filtered off (yield 70%).
2,3-Pyrazinecarboxylic anhydride
Spectrum DetailBack Directory
[Spectrum Detail]

2,3-Pyrazinecarboxylic anhydride(4744-50-7)Raman
2,3-Pyrazinecarboxylic anhydride(4744-50-7)IR
2,3-Pyrazinecarboxylic anhydride(4744-50-7)FT-IR
Well-known Reagent Company Product InformationBack Directory
[Sigma Aldrich]

4744-50-7(sigmaaldrich)
4744-50-7 suppliers list
Company Name: HUARONG(GUANGDONG) PHARMACEUTICAL CO.,LTD
Tel: +86-19925801629 +86-19925801629 , +86-19925801629
Website: www.huarongpharma.com/
Company Name: Shannxi Bosen Medical Technology Co.,Ltd
Tel: 15591899801 , 15591899801
Website: www.approvedhomemanagement.com/ShowSupplierProductsList1754227/0.htm
Company Name: Capot Chemical Co.,Ltd.
Tel: +86-(0)57185586718 +86-13336195806 , +86-13336195806
Website: www.capot.com
Company Name: Beijing Cooperate Pharmaceutical Co.,Ltd
Tel: 010-60279497
Website: http://www.cooperate-pharm.com
Company Name: Henan Tianfu Chemical Co.,Ltd.
Tel: +86-0371-55170693 +86-19937530512 , +86-19937530512
Website: https://www.tianfuchem.com/
Company Name: Hangzhou FandaChem Co.,Ltd.
Tel: +8615858145714 , +8615858145714
Website: www.fandachem.com/
Company Name: ATK CHEMICAL COMPANY LIMITED
Tel: +undefined-21-51877795
Website: www.atkchemical.com
Company Name: career henan chemical co
Tel: +86-0371-86658258 +8613203830695 , +8613203830695
Website: www.coreychem.com/
Company Name: Hubei Jusheng Technology Co.,Ltd.
Tel: 18871490254
Website: www.hubeijusheng.com
Company Name: Jinan Finer Chemical Co., Ltd
Tel: +86-531-88989536 +86-15508631887 , +86-15508631887
Website: http://www.finerchem.com/
Company Name: Accela ChemBio Inc.
Tel: +1-858-6993322
Website: www.accelachem.com/
Company Name: Xiamen AmoyChem Co., Ltd
Tel: +86-86-5926051114 +8618959220845 , +8618959220845
Website: www.amoychem.com/
Company Name: Chongqing Chemdad Co., Ltd
Tel: +86-023-6139-8061 +86-86-13650506873 , +86-86-13650506873
Website: http://www.chemdad.com/
Company Name: Alchem Pharmtech,Inc.
Tel: 8485655694
Website: www.approvedhomemanagement.com/ShowSupplierProductsList454175/0.htm
Company Name: Wuhan Chemwish Technology Co., Ltd
Tel: 027-67849912
Website: www.approvedhomemanagement.com/ShowSupplierProductsList485773/0.htm
Company Name: CONIER CHEM AND PHARMA LIMITED
Tel: +8618523575427 , +8618523575427
Website: http://www.conier.com/
Company Name: Shaanxi Dideu Medichem Co. Ltd
Tel: +86-29-87569262 +86-15319487004 , +86-15319487004
Website: www.dideu.com
Company Name: Richest Group Ltd
Tel: 18017061086
Website: www.approvedhomemanagement.com/ShowSupplierProductsList664261/0.htm
Tags:4744-50-7 Related Product Information
290-37-9 29094-61-9 118-48-9 108-31-6 85-44-9 148891-53-6 59325-11-0 89-01-0 358-23-6 98-96-4 106-58-1 1348046-61-6 1122549-43-2 43200-96-0 43200-83-5 43200-81-3 45965-30-8 43200-82-4