What are Naphthol dyes?


naphthol dyes

What are Naphthol dyes?

Naphthol dyes are insoluble azo dyestuffs that are produced on the fiber by applying a Naphthol to the fiber and then combining it with a diazotized base or salt at a low temperature to produce an insoluble dye molecule within the fiber. Naphthol dyes are classified as fast dyes, usually slightly cheaper than Vat dyes; the application are complex while the range of colors is limited.

Azoic combinations are still the only class of dyes that offer very deep orange, red, scarlet and bordeaux shades with excellent light and washing fastness.The pigments produced have bright colors, but there are no greens or bright blues. Rubbing fastness varies with shades but washing fastness is equal to Vat dyes, generally with less light fastness than Vat dyes.

Tianjin Leading Import and Export Co., Ltd. offers a series of Naphthol dyes listed as below:

Product Name

C.I. No.

Naphthol AS

Azoic Coupling Component 2

Naphthol AS-BS

Azoic Coupling Component 17

Naphthol AS-BO

Azoic Coupling Component 4

Naphthol AS-G

Azoic Coupling Component 5

Naphthol AS-OL

Azoic Coupling Component 20

Naphthol AS-D

Azoic Coupling Component 18

Naphthol AS-PH

Azoic Coupling Component 14

Fast Scarlet G Base

Azoic Diazo Component 12

Fast Scarlet RC Base

Azoic Diazo Component 13

Fast Bordeaux GP Base

Azoic Diazo Component 1

Fast Red B Base

Azoic Diazo Component 5

Fast Red RC Base

Azoic Diazo Component 10

Fast Garnet GBC Base

Azoic Diazo Component 4

Fast Yellow GC Base

Azoic Diazo Component 44

Fast Orange GC Base

Azoic Diazo Component 2