Acid Dyes
An acid dye is a dye that is typically applied to a textile at low pH. They are mainly used to dye wool, not cotton fabrics. Some acid dyes are used as food colorants.
Acid dyes are highly water soluble, and have better light fastness than basic dyes.The textile acid dyes are effective for protein fibers such as silk, wool, nylon and modified acrylics. They contain sulphonic acid groups, which are usually present as sodium sulphonate salts.
|
Richest
Acid Dyestuffs |
Color
Sample |
Dyeing depth
(% o.w.f)
|
C.I.NO.
(Direct) |
S.D.C. (Class.)
|
Sol.
|
Fastness
|
|||
|
Light
|
Washing
|
Rubbing (Dry)
|
|||||||
|
1
|
Chrysophenine
G
|
 |
1
|
Y-12
|
A
|
30
|
3
|
3-4
|
4
|
|
2
|
Yellow AGFL
|
 |
1
|
Y-50
|
A
|
60
|
6
|
4
|
4
|
|
3
|
Supra Yellow
BL
|
 |
1
|
Y-86
|
B
|
100
|
6
|
4-5
|
5
|
|
4
|
Yellow F8G
|
 |
1
|
Y-87
|
B
|
80
|
4
|
4-5
|
4
|
|
5
|
Yellow ARL 150%
|
 |
1
|
Y-106
|
B
|
60
|
6
|
4
|
4
|
|
6
|
Supra Yellow
PGS
|
 |
1
|
Y-142
|
B
|
50
|
5
|
3-4
|
4-5
|
|
7
|
Fast Oranges
S
|
 |
1
|
Or-26
|
C
|
8
|
3-4
|
3-4
|
4
|
|
8
|
Supra Orange
2GL
|
 |
1
|
Or-39
|
B
|
100
|
4-5
|
4-5
|
4-5
|
|
9
|
Bordeaux GS
|
 |
1
|
R-13
|
C
|
50
|
3
|
3-4
|
4
|
|
10
|
Fast Scarlet
4BS
|
 |
1
|
R-13
|
C
|
25
|
3
|
4
|
4
|
|
11
|
Red BB
|
 |
1
|
R-31
|
A
|
8
|
2
|
3
|
3-4
|
|
12
|
Red 5B 200%
|
 |
1
|
R-81
|
A
|
30
|
4
|
3
|
4
|
|
13
|
Supra Rubine
BL
|
 |
1
|
R-83:1
|
B
|
60
|
5
|
3-4
|
4
|
|
14
|
Light Scarlet
F2G
|
 |
1
|
R-224
|
B
|
50
|
3-4
|
4
|
4-5
|
|
15
|
Light Red F2G
|
 |
1
|
R-225
|
B
|
100
|
3-4
|
5
|
4
|
| 16 |
Yellow 5GL
|
 |
2
|
Y-27
|
A
|
30
|
5-6
|
3
|
2-3
|
| 17 |
Yellow GC
|
 |
2
|
Y-44
|
A
|
40
|
4-5
|
1-2
|
2
|
| 18 |
Yellow L-5R
|
 |
2
|
Y-83
|
B
|
60
|
4-5
|
3-4
|
4-5
|
|
16
|
Eosine G
|
 |
1
|
R-4
|
35
|
A
|
4
|
2-3
|
4-5
|
|
17
|
Scarlet 3R
|
 |
1
|
R-18
|
40
|
A
|
4
|
4-5
|
5
|
|
18
|
Red B 130%
|
 |
1
|
R-37
|
40
|
B
|
6-7
|
4-5
|
4-5
|
|
19
|
Rhodamine B 400%
|
 |
1
|
R-52
|
50
|
C
|
2-3
|
4-5
|
5
|
|
20
|
Red M-PG
|
 |
1
|
R-85
|
40
|
A
|
5-6
|
2-3
|
5
|
|
21
|
Red AG
|
 |
1
|
R-97
|
40
|
A
|
2
|
4-5
|
4-5
|
|
22
|
Scarlet FGW
|
 |
1
|
R-111
|
60
|
A
|
4-5
|
4-5
|
5
|
|
23
|
Red M-RS
|
 |
1
|
R-114
|
80
|
A
|
3-4
|
3-4
|
5
|
|
24
|
Red Brown M-V
conc
|
 |
1
|
R-119
|
40
|
A
|
6-7
|
3
|
5
|
|
25
|
Red BRN
|
 |
1
|
R-128
|
70
|
A
|
5-6
|
4-5
|
5
|
|
26
|
Brill Red 3BN
|
 |
1
|
R-131
|
100
|
A
|
1-2
|
4-5
|
4
|
|
27
|
Red GS 200%
|
 |
1
|
R-151
|
40
|
C
|
5-6
|
3
|
4
|
|
28
|
Red 2B
|
 |
1
|
R-249
|
40
|
A
|
5
|
4-5
|
5
|
|
29
|
Floxine NK
|
 |
1
|
R-257
|
70
|
B
|
4-5
|
3
|
5
|
|
30
|
Red 2BSAN
|
 |
1
|
R-266
|
15
|
A
|
6
|
1-2
|
5
|
|
31
|
Rubine 5BLF
|
|
1
|
R-299
|
50 |
A
|
5-6
|
4-5
|
4-5
|
|
32
|
Red FRL
|
|
1
|
R-337
|
60 |
B
|
6
|
2-3
|
5
|
|
33
|
Red NBR
|
|
1
|
R-366
|
30 |
B
|
6
|
1-2
|
4-5
|
|
34
|
Scarlet FGS
|
|
1
|
MIX
|
80 |
A
|
4
|
4-5
|
4-5
|
|
35
|
Red GN 175%
|
|
1
|
-
|
60 |
A
|
6-7
|
4
|
5
|
|
36
|
Brown L-R
|
|
1
|
Br-14
|
60 |
A
|
3-4
|
4
|
5
|
|
37
|
Brown MR
|
|
1
|
Mix
|
30 |
A
|
5
|
3
|
4-5
|
|
38
|
Red 6B
|
|
1
|
V-7
|
60 |
B
|
4-5
|
4-5
|
5
|
|
39
|
Red 3BL
|
|
1
|
V-12
|
50 |
B
|
4-5
|
4-5
|
5
|
|
40
|
Violet FBL 180%
|
|
1
|
V-48
|
100 |
A
|
5-6
|
4-5
|
5
|
|
41
|
Bordeaux MB
|
|
1
|
V-90
|
15 |
D
|
6
|
4-5
|
4-5
|
|
42
|
Blue A-GL
|
|
1
|
B-25
|
80 |
B
|
6
|
1-2
|
3-4
|
|
43
|
Blue N2G
|
|
1
|
B-40
|
70 |
B
|
6
|
2
|
4-5
|
|
44
|
Sky Blue R 200%
|
|
1
|
B-62
|
50 |
B
|
5-6
|
2
|
5
|
|
45
|
Cyanine L-6B
200%
|
|
1
|
B-83
|
80 |
B
|
1
|
4
|
5
|
|
46
|
Brill Blue L-BR
cone
|
 |
1
|
B-83
|
80
|
B
|
1
|
4
|
5
|
|
47
|
Cyanine M-5R
conc New
|
 |
1
|
B-113
|
70
|
A
|
6
|
3
|
5
|
|
48
|
Cyanine M-5R
conc New ECO
|
 |
1
|
B-113
|
70
|
A
|
6
|
3
|
5
|
|
49
|
Cyanine M-5R
cone
|
 |
1
|
B-113
|
70
|
A
|
6
|
3
|
5
|
|
50
|
Cyanine M-5R
conc ECO
|
 |
1
|
B-113
|
70
|
A
|
6
|
3
|
5
|
|
51
|
Blue ARL 200%
|
 |
1
|
B-129
|
15
|
B
|
6
|
1-2
|
4-5
|
|
52
|
Turquoise Blue
5G
|
 |
1
|
B-185
|
100
|
A
|
1-2
|
4
|
5
|
|
53
|
Navy S-DNL
|
 |
1
|
B-193
|
80
|
D
|
6-7
|
4-5
|
5
|
|
54
|
Blue RL 200%
|
 |
1
|
B-260
|
70
|
A
|
6-7
|
4-5
|
5
|
|
55
|
Blue AFN
|
 |
1
|
B-264
|
70
|
A
|
6-7
|
4
|
4-5
|
|
56
|
Blue GLF
|
 |
1
|
B-281
|
80
|
A
|
6
|
4
|
5
|
|
57
|
Blue BRLF
|
 |
1
|
B-324
|
40
|
A
|
6-7
|
1-2
|
5
|
|
58
|
Green V
|
 |
1
|
Gr-16
|
100
|
C
|
2-3
|
3-4
|
3-4
|
|
59
|
Dark Green L-A
|
 |
1
|
Gr-20
|
70
|
B
|
6
|
4-5
|
5
|
|
60
|
Blue Black 10B
|
 |
1
|
BK-1
|
35
|
B
|
6
|
3-4
|
4-5
|
|
61
|
Black VLG 150%
|
 |
2
|
BK-24
|
80
|
A
|
5-6
|
4
|
4-5
|
|
62
|
Black M-B
|
 |
4
|
BK-29
|
25
|
A
|
6-7
|
3-4
|
4-5
|
|
63
|
Grey K-BL
|
 |
2
|
BK-60
|
60
|
D
|
6-7
|
4-5
|
5
|
|
64
|
Black LD 140
|
 |
2
|
BK-172
|
80
|
D
|
5-6
|
4
|
5
|
|
65
|
Black LDN 140
|
 |
2
|
BK-172
|
80
|
D
|
5-6
|
4-5
|
5
|
|
66
|
Black MR
|
 |
2
|
BK-194
|
80
|
D
|
6-7
|
4
|
5
|
|
67
|
Black NGS
|
 |
2
|
BK-210
|
100
|
A
|
5
|
3
|
4
|
|
68
|
Black RL 150%
|
 |
2
|
BK-234
|
80
|
A
|
3
|
4
|
4
|
|
69
|
Black M-B S/P
conc
|
 |
2
|
MIX
|
75
|
A
|
5-6
|
3-4
|
4
|
|
70
|
Black MBN H/C
|
 |
2
|
MIX
|
40
|
A
|
5-6
|
3-4
|
4
|
|
71
|
Black NB H/C
|
 |
2
|
-
|
50
|
A
|
6
|
4
|
5
|
|
72
|
Black NBLN 170%
|
 |
2
|
MIX
|
80
|
A
|
5-6
|
4-5
|
4-5
|
|
73
|
Black RSE
|
 |
2
|
MIX
|
50
|
A
|
6-7
|
2-3
|
4-5
|
|
74
|
Black RLW 180%
|
 |
2
|
MIX
|
80
|
A
|
3
|
4
|
4
|
