品红(英语：Fuchsine)有苯胺红基、一品红基、碱式一品红、玫苯胺盐酸盐等十几种别名。为一颜料，其溶入蒸馏水后通入二氧化硫所制得溶液称为希夫试剂，可用来检测醛类。

在与显微镜标本染色的相关文献中，品红(fuchsine)经常被错误拼写，遗漏了代表胺类的后缀e。美国和英国的字典(Webster's、Oxford、Chambers)等标出了正确的拼法(fuchsine)，同时是用于印染工业文献的拼法。

Fuchsine (sometimes spelled fuchsin) or rosaniline hydrochloride is a magenta dye with chemical formula C₂₀H₁₉N₃·HCl. There are other similar chemical formulations of products sold as fuchsine, and several dozen other synonyms of this molecule.

It becomes magenta when dissolved in water; as a solid, it forms dark green crystals. As well as dying textiles, fuchsine is used to stain bacteria and sometimes as a disinfectant. In the literature of biological stains the name of this dye is frequently misspelled, with omission of the terminal -e, which indicates an amine. American and English dictionaries (Webster's, Oxford, Chambers, etc.) give the correct spelling, which is also used in the literature of industrial dyeing. It is well established that production of fuchsine results in development of bladder cancers by production workers. Production of magenta is listed as a circumstance known to result in cancer.