英语词典化工词典

4H-Pyran-2-carboxylicacid, 5-hydroxy-4-oxo-

4H-Pyran-2-carboxylicacid, 5-hydroxy-4-oxo-


  • 中文别名:5-羟基-4-氧-4H-2-羧酸
  • 中文释义:5-羟基-4-氧-4H-2-羧酸;5-羟基-4-氧代-4H-吡喃-2-羧酸;5-羟基-4-氧代-4H-2-羧酸
  • 英文别名:5-hydroxy-4-oxopyran-2-carboxylic acid;
    2-Carboxy-5-hydroxy-4-pyrone;
    5-Hydroxy-4-oxo-4H-pyran-2-carboxylic acid;
    Comenic acid;
    5-hydroxy-4-pyrone-2-carboxylic acid;
    5-hydroxy-2-carboxy-4-pyrone 
  • CAS No.:499-78-5
  • 分子式:C6H4O5
  • 分子量:0
  • 精确分子量:156.00600
  • PSA:87.74000
  • InChI:InChI=1/C6H4O5/c7-3-1-5(6(9)10)11-2-4(3)8/h1-2,8H,(H,9,10)
  • 分子结构式:

物化性质

密度:
1.819g/cm3
熔点:
284-294ºC
沸点:
420.7ºC at 760mmHg
闪点:
187.7ºC
折射率:
1.66
蒸汽压:
7.71E-09mmHg at 25°C

安全信息

密度:
1.819g/cm3
熔点:
284-294ºC
沸点:
420.7ºC at 760mmHg
闪点:
187.7ºC
折射率:
1.66
蒸汽压:
7.71E-09mmHg at 25°C

海关数据

中国海关编码:2932999099

概述:
2932999099. 其他仅含氧杂原子的杂环化合物. 增值税率:17.0%. 退税率:13.0%. 监管条件:无. 最惠国关税:6.5%. 普通关税:20.0%
申报要素:
品名, 成分含量, 用途
摘要/Summary:
2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

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