没食子酸 gallic acid

物理描述 Physical Description

Gallic acid is an odorless white solid. Sinks in water. (USCG, 1999)

颜色/状态 Color Form

Colorless or slightly yellow cyrstalline needles or prisms.

沸点 Boiling Point

SUBLIMES (NTP, 1992)

熔点 Melting Point

258-265°C

溶解度 Solubility

Water solubility = 1.19X10+4 mg/l @ 25 °C

密度 Density

1.69 kg/l at 20 °C

分解 Decomposition

Decomposes at 235-240 °C.

解离常数 Dissociation Constants

pKa = 4.40

保留指数 Kovats Retention Index

1754

其他实验性质 Other Experimental Properties

Sublimes at 210 °C giving a stable form with melting point 258 to 265 °C (dec) and an unstable form with melting point 225 to 230 °C

辛醇/水分配系数 LogP

0.7 (LogP)

碰撞截面 Collision Cross Section

130.9 Ų [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine and drug standards]