Retene, methyl isopropyl phenanthrene or 1-methyl-7-isopropyl phenanthrene, C18H18, is a polycyclic aromatic hydrocarbon present in the coal tar fraction, boiling above 360 °C. It occurs naturally in the tars obtained by the distillation of resinous woods. It crystallizes in large plates, which melt at 98.5 °C and boil at 390 °C. It is readily soluble in warm ether and in hot glacial acetic acid. Sodium and boiling amyl alcohol reduce it to a tetrahydroretene, whilst if it be heated with phosphorus and hydriodic acid to 260 °C, a dodecahydride is formed. Chromic acid oxidizes it to retene quinone, phthalic acid and acetic acid. It forms a picrate which melts at 123-124 °C.

CAS：483-65-8
中文别名：1-甲基-7-异丙基菲;7-異丙-1-甲菲;
英文别名：methyl-7-isopropylphen-anthrene;7-isopropyl-1-methyl-phenanthrene;1-METHYL-7-ISOPROPYLPHENANTHRENE;1-methyl-7-isopropylphenathrene;Reten;Phenanthrene, 1-methyl-7-(1-methylethyl)-;1-methyl-7-methylethyl-phenanthrene;Methylisopropylphenanthrene;7-Isopropyl-1-methyl-phenanthren;
分子式：C18H18
分子量：234.336
精确质量：234.141
Psa：0.0
Logp：5.4248

UNII：0W2D2E1P9Q

外观与性状：米色片
密度：1.046 g/cm3
沸点：208°C10mm Hg(lit.)
熔点：95-97°C(lit.)
闪点：177.8ºC
折射率：1.642
稳定性：Stable. Incompatible with strong oxidizing agents.
蒸汽压：5.34E-06mmHg at 25°C

WGK Germany：3