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%