Water soluble monoazo dyes which, in the form of the free acids, have the formula:
wherein A represents the residue of a diazo component of the benzene series containing a single sulphonic acid group and optionally one or more other substituents, R' represents hydrogen or lower alkyl and each of R2 and R3 independently represents hydrogen, optionally substituted alkyl or phenyl, or R2 and R3 together with the nitrogen atom to which they are attached form a saturated ring.
The dyes are applicable as acid dyes to natural and synthetic polyamide textile materials on which they give fast bright yellow shades.
水溶性单偶氮
染料,以
游离酸的形式具有以下式子:
其中 A 代表苯系列重氮组分的残留物,含有一个
磺酸基团和一个或多个其他取代基,R'代表氢或低级烷基,R2 和 R3 各自独立地代表氢、任选取代的烷基或苯基,或 R2 和 R3 与它们所连接的氮原子一起形成一个饱和环。
这些
染料作为
酸性染料适用于天然和合成聚酰胺纺织材料,可快速产生明亮的黄色色调。