C.I. Reactive Red 21, with the CAS number 11099-79-9, is a synthetic dye commonly used in textile applications, particularly for dyeing cotton and other cellulose fibers. This azo dye is characterized by its vibrant red color and its ability to form covalent bonds with the fiber, which enhances its wash and light fastness compared to other dye types. Reactive Red 21 belongs to the class of reactive dyes, which are known for their reactivity with hydroxyl or amino groups in the substrate, allowing for strong attachment and durability. The dye is typically applied in an alkaline medium, facilitating the reaction between the dye and the fiber. In terms of safety, like many azo dyes, it is essential to handle Reactive Red 21 with care, as some azo compounds can release aromatic amines, which may pose health risks. Environmental considerations are also important, as the discharge of dye effluents can impact aquatic ecosystems. Overall, C.I. Reactive Red 21 is valued in the textile industry for its color properties and bonding capabilities.

C.I. Reactive Red 21

11099-79-9: C.I. Reactive Red 21, with the CAS number 11099-79-9, is a synthetic dye commonly used in textile applications, particularly for dyeing cotton and other cellulose fibers. This azo dye is characterized by its vibrant red color and its ability to form covalent bonds with the fiber, which enhances its wash and light fastness compared to other dye types. Reactive Red 21 belongs to the class of reactive dyes, which are known for their reactivity with hydroxyl or amino groups in the substrate, allowing for strong attachment and durability. The dye is typically applied in an alkaline medium, facilitating the reaction between the dye and the fiber. In terms of safety, like many azo dyes, it is essential to handle Reactive Red 21 with care, as some azo compounds can release aromatic amines, which may pose health risks. Environmental considerations are also important, as the discharge of dye effluents can impact aquatic ecosystems. Overall, C.I. Reactive Red 21 is valued in the textile industry for its color properties and bonding capabilities.

CAS 11099-79-9

C.I. Reactive Red 21

Reactive Red 21 (Remazol Red BB)

Ref: SR-15034