邻苯二酚 Pyrocatechol

物理描述 Physical Description

Solid; white; odorless. Sinks and mixes with water. (USCG, 1999)

颜色/状态 Color Form

Monoclinic tablets, prisms from toluene ... its aqueous solutions soon turn brown

气味 Odor

Faint characteristic odor

味道 Taste

Sweet and bitter taste

沸点 Boiling Point

245 °C

熔点 Melting Point

105 °C

闪点 Flash Point

260 °F (127 °C) (Closed cup)

溶解度 Solubility

461000 mg/L (at 25 °C)

密度 Density

1.344 at 68 °F (USCG, 1999)

蒸气密度 Vapor Density

3.79 (NTP, 1992) (Relative to Air)

蒸汽压力 Vapor Pressure

3X10-2 mm Hg at 20 °C (extrapolated)

稳定性/保质期 Stability Shelf Life

Discolors in air and light ... its aqueous solution soon turns brown.

自燃温度 Autoignition Temperature

510 °C

分解 Decomposition

Energy of decomposition (in range 260-420 °C) measured as 0.42 kJ/g by differential scanning calorimetry (DSC), and T-ait24 was determined as 207 °C by adiabatic Dewar tests, with an apparent energy of activation of 114 kJ/mol.

气味阈值 Odor Threshold

detection: 8.0 mg/L

折光率 Refractive Index

Index of refraction: 1.604 at 25 °C

解离常数 Dissociation Constants

pKa1 = 9.45; pKa2 = 12.8

保留指数 Kovats Retention Index

1199.8;1200.1;1197;1197;1219;1210;1201;1209.1;1208.2;1215

其他实验性质 Other Experimental Properties

BP: 221.5 °C at 400 mm Hg; 197.7 °C at 200 mm Hg; 176 °C at 100 mm Hg; 161.7 °C at 60 mm Hg; 134 °C at 20 mm Hg; 118.3 °C at 10 mm Hg; 104 °C at 5 mm Hg ... Volatile with steam

辛醇/水分配系数 LogP

0.88

水溶性 Logs

0.62

大气OH速率常数 Atmospheric Oh Rate Constant

1.04e-10 cm3/molecule*sec

酸度系数/解离常数 pKa

9.45 (at 25 °C)

碰撞截面 Collision Cross Section

114.5 Ų [M-H]- [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]