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Basic dyes series
Direct dyes series
Acid dyes
Acid dyes series
L-Valine methyl ester hydrochloride
4-Aminoacetanilide
Permanent Yellow 83
Benzidine Yellow G
Sodium 3-Nitrobenzenesulfonate
Rhodamine B Liquid
Violet Liquid

Direct Fast Scarlet 4BS
Alias：Benzo Scarlet 4BS（BAY）；Chloramine Fast Scarlet 4BS（S）；Diacotton Fast Scarlet 4BS（MCI）；Diapaper Red G（MCI）；Diazol Fast Scarlet 4B（ICI）
Color index：C.I. Direct Red 23 (29160)
English name：Direct Fast Scarlet 4BS；Aizen Primula Scarlet 4BSH（HCC）；Atlantic Direct Faft Scarlet 4BS（ATL）；Benzo Scarlet 4BS（BAY）；Chloramine Fast Scarlet 4BS（S）；Diacotton Fast Scarlet 4BS（MCI）；Diapaper Red G（MCI）；Diazol Fast Scarlet 4B（ICI）；Direct Fast Scarlet 4BS（NSK）；Direct Fast Scarlet 4BS-N（MCI）；Direct Scarlet 4BS（CNC）；Direct Scarlet SE（CKC）；Kayafect Red G（KYK）；Kayaku Direct Fast Scarlet 4BS（KYK）；Levacell Scarlet 4BS（BAY）；Mitsui Direct Fast Scarlet 4BS（MDW）；Pemaderm Red RR（HOE）；Shangdirect Fast Scarlet 4BS（SHD）；Solophenyl Scarlet D-RS（CGY）；Tertrodirect Scarlet 4BS（CKC）.
Structural formula：
Process flows ：

Characters：purple red powder and soluble in water to become bright red. Soluble in acetone

Quality standard GB 1651—82

Index name	Index
Apperance strength，separated coloured light Color fastness in wool wool fabrics, impurity content insoluble in water，% moisture content，% fineness（80 meshes residual content），%	purple red equal powder 100±3 of standard products similar to standard products accord to standard products ≤1 ≤4 ≤5

Use：mainly used in cotton and other fabric dyeing, and directly used in printing and silk, wool and other fabrics.

Application performance：Colour fastness(grade) in cotton fabrics：

Solarization

Soaping

Water leaching

Perspiration

Ironing

Friction

Acid and alkali resistance

fading

staining

fading

staining

fading

staining

dry

wet

sulphuric acid

acetic acid

sodium carbonate

2～3

3～4

2～3

4～5