ベーシックレッド2

外観

黒緑色又は黒褐色～黒色、粉末又は塊

定義

本品は、次の化学式で表されるフェナジン系の頭髪用色素である。

溶解性

水及びエタノールにやや溶けにくい。水にわずかに溶け、エチルアルコールには溶けにくい。

解説

サフラニン，塩基性を示す赤色の合成染料。羊毛・絹を染色する。酸塩基指示薬の一。生体染色の染色液として、グラム染色の対比染色にも用いられる。

化粧品の成分用途

毛髪着色剤

化学的特性

Dark red to violet powder

使用

In forensics to visualize details of cyanoacrylate-fumed friction ridges of human digits.

定義

A red dye that flu- oresces when exposed to selected wavelengths of light.

主な応用

Basic Red 2 is disclosed as colored charge-controlling agent in toners for electrophotography and as photosensitizer in solar cells. Safranine dyes are also suitable for use in photoelectric processes. Further more,they can be used as desensitizers indirect positive printing-out emulsions, for photopolymerization using visible light,a slight filters with variable optical density, and as dye components in soluble complex-forming molecules used in affinity-specific separation of nucleic acids.

製造方法

commonly known as Safranine T. Such molecular ratio of 2-Methylbenzene-1 ,4-diamine, and O-Methylaniline oxidation, the resulting condensation product of aniline and purified by precipitation segmented dye, and then converted to the chloride.

純化方法

Crystallise it from *benzene/MeOH (1:1) or water. Dry it in vacuo over H2SO4. It has UV: at 520nm (H2O) and 530nm (EtOH). [Beilstein 25 H 403, 25 I 657, 25 III/IV