Alkannin

出处:按学科分类—工业技术 北京工业大学出版社《化学试剂目录手册》第26页(575字)

〔71-290〕 C16H16O5 288.29

[紫朱草素;紫草红;(S)-5,8-Dihydroxy-2-(1-hydroxy-4-methyl-3-pentenyl)-1,4-naphthalcncdione;(5,8-Dihydroxy2-(1-hydroxy-4-methyl-3-pentenyl)-1,4-naphthoquinone;Alkanet extract Alkannared;Anchusa acid;Anchusin;(1-Hydroxy-3-isohexenyl)naphthazarine;2-(1-Hydroxy-4-methyl 3-Pentenyl)-5,8-dihydroxy-1,4-naphthoquinone;C.1.Natu ral red 20]

M.I.10,238 C.I.75530

性状 来自苯的具有金属光泽的棕红色棱柱结晶。溶于有机溶剂,微溶于水。缓冲水溶液pH值6.1时为红色,pH值8.8时为紫色,pH值10.0时为蓝色。mp 149℃。

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