3-氧代-3H-苯并吡喃-2-羧酸

3-氧代-3H-苯并吡喃-2-羧酸

3-oxobenzo[f]chromene-2-carboxylic acid

4361-00-6

C14H8O4

240.21100

67.51000

2.64440

240.04200

1.719

194ºC

236-239ºC

1.487 g/cm3

486.2ºC at 760 mmHg

2918300090

Xi

品名, 成分含量, 用途

2918300090 其他含醛基或酮基不含其他含氧基羧酸（包括酸酐、酰卤化物、过氧化物和过氧酸及该税号的衍生物）. 增值税率:17.0% 退税率:9.0% 监管条件:无 最惠国关税:6.5% 普通关税:30.0%

2918300090 other carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0%

2918300090. Other carboxylic acids with aldehyde or ketone function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives. General tariff: