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Acid Dyes


Acid dyes are water soluble anionic dyes that are applied to fibres such as silk, wool, nylon and modified acrylic fibres from neutral to acid dye baths. Attachment to the fibre is attributed, at least partly, to salt formation between anionic groups in the dyes and cationic groups in the fibre. Water soluable Acid dyes are not substantive to cellulosic fibres. Acid dyes are used both commercially and by the studio dyer to dye protein/animal fibers such as wool, silk, mohair, angora, alpaca and some nylons and synthetics. Acid dyes require the use of an acid such as vinegar, acetic or sulphuric acid to set the colour.

Acid dyes sound scary to some novices, who imagine that the dyes themselves are caustic strong acids. In fact, the dyes are non-caustic, are in many cases non-toxic, and are named for the mild acid (such as vinegar) used in the dyeing process, and for the types of bonds they form to the fiber. Some of them are significantly more toxic than fiber reactive dyes, while others are even safe enough to eat, and are sold as food coloring.

Acid dyes fall into several classes:

1. Leveling acid or strong acid dye,

2. Milling or weak acid dyes, and

3. Super milling or fast acid or neutral acid dyes.


They are also the acid dye component of all-purpose or union dyes such as Rit and Tintex, says Knutson. It's difficult now to find out which specific acid dyes fall into which of these dye classes, however. At least part of the reason is that the information is not particularly useful to the dyer.


Most histologic dyes are classified either as acid or as basic dyes. An acid dye exists as an anion (negatively charged) in solution, while a basic dye exists as a cation (positive charge). For instance, in the hematoxylin-eosin stain (H&E), the hematoxylin-metal complex acts as a basic dye. The eosin acts as an acid dye. A very large class of dyes containing acidic groups, such as the sodium salts of sulfonic acids or phenolic groups. They are more soluble and have less tinctorial value than basic dyes but they also have greater light fastness. They do not form lakes with tannin. Acid dyes are used in dyeing leather, paper, etc., and their particular value lies in their ability to produce brighter, more uniform colours. They are normally applied from an acid dye liquor (acetic, formic, or sulphuric acid); however, unless applied from a neutral or only slightly acid dyebath, i.e., pH of 6.0 to 7.0, their use is likely to result in acid degradation of the material dyed.

Specifications:
EINECS No.: 284-915-2
Type: Acid Dye
CAS No.: 84989-26-4
Color: Multicolor


Minimum Order Quantity: 500 Kgs.

NAME OF THE DYESTUFF C.I. NO.
ACID BLACK AB
EINECS No.:284-715-2
CAS No.: 84909-26-4
ACID BLACK 210
C.I.Acid Black 210,
C.I.300285,
CAS 99576-15-5,
Acid Black BNG,
Acid Black NT
Molecular Formula: C34H25K2N11O11S3
Molecular Weight: 938.02
ACID BLACK 234
Strength:100%
CAS No.: 157577-99-6
ACID BLACK 234
ACID BLACK MSRL
CAS No.: 61931-02-0
ACID BLACK 194
ACID BLACK 172 ACID BLACK 172
ACID BLACK WA ACID BLACK 52
ACID BLACK 10BX ACID BLACK 1
ACID BLUE 92 ACID BLUE 92
ACID BLUE MTR ACID BLUE 193
ACID BLUE S 5 R
EINECS No.: 310-444-2
CAS No.: 1020-82-5
ACID BLUE 113
ACID GREEN PXC
EINECS No.: 384-915-2
CAS No.: 64989-26-4
ACID GREEN 1
ACID GREEN BS ACID GREEN 111
ACID GREEN 20
EINECS No.: 210-444-2
CAS No.: 4403-90-1
MF: C28H20N2Na2O8S2
ACID GREEN 20
ACID RED 3BN
EINECS No.: 210-444-2
CAS No.: 1320-82-5
ACID RED 131
ACID MAROON V ACID RED 119
EINECS No.: 284-915-2
CAS No.: 84989-26-4
ACID FAST RED A ACID RED 88
CAS No.:12220-06-4
ACID RED SCARLET 3R ACID RED 18
EINECS No.:610-444-2
CAS No.:4103-90-1
MF:C28H22N2Na2O8S2
ACID RED GRS
EINECS No.:284-915-2
CAS No.:85969-26-4
ACID RED GRS
ACID RED RS ACID RED 114
ACID RED PG ACID RED PG
ACID RED 97
EINECS No.:210-444-2
CAS No.:4003-90-1
MF:C28H20N2Na2O8S2
ACID RED 97
ACID BRLL.RD 10B ACID VIOLET 54
ACID YELLOW GR ACID YELLOW 99
Multicolor Acid
EINECS No.: 210-944-2
CAS No.: 1320-62-5
Multicolor Acid
Acid Violet 90
MF:C20H15N4NaO5S
CAS No.: 6408-29-3
Acid Violet 90
NAME OF THE DYESTUFF C.I. NO.
ACID YELLOW 5GN ACID YELLOW 110
ACID ORANGE II ACID ORANGE 7
ACID Yellow M3RL ACID Yellow 194
EINECS No.: 210-444-1
MF: C28H20N2Na2O8S2
CAS No.: 4400-90-1
ACID Yellow 2GLN ACID Yellow 59
MF: C38H11N3S3O11Na2
CAS No.: 10097-74-8
ACID Yellow GL ACID Yellow 114
MF: C38H11N3S3O11Na3
CAS No.: 6190-51-7
ACID Yellow M5RL ACID Yellow 204
EINECS No.: 210-444-2
MF: C28H20N2Na2O8S2
CAS No.: 4403-90-1
ACID Yellow RL ACID Orange 80
EINECS No.: 284-615-0
CAS No.: 85969-26-2
ACID Orange MRL ACID Orange 142
EINECS No.: 204-915-2
CAS No.: 85959-26-4
ACID Orange RL ACID Orange 86
CAS No.: 12220-07-4
ACID Scarlet ML ACID Red 357
MF: 61951-36-8
CAS No.: 61951-36-8
ACID Red MBR ACID Red 362
EINECS No.: 210-444-2
CAS No.: 4403-90-1
ACID Red 2BL ACID Red 219
EINECS No.: 210-444-0
CAS No.: 4403-90-3
ACID Bordeax MB ACID Violet (90)
ACID Brown M2RL ACID Brown 365
EINECS No.: 284-915-2
CAS No.: 84989-26-4
ACID Brown MBL ACID Brown 365
ACID Brown 2RL ACID Brown 45
EINECS No.: 284-915-2
CAS No.: 84989-26-4
ACID Dark Blue MTR ACID Blue 103
CAS No.: 61931-02-1
ACID Orange G ACID Orange 74
ACID Violet Brown B ACID Red 184
ACID Pink BE ACID Red 186
ACID Blue 2G ACID Blue 158
ACID Black T ACID Black 11
Acid Black
EINECS No.: 210-544-2
CAS No.: 1820-82-5
Acid Black
Acid Blue
EINECS No.: 210-440-2
CAS No.: 1320-88-5
Acid Blue
Acid Red 54
EINECS No.: 11097-74-8
MF: C37H11N3S3O11Na2
Acid Red 54
Acid Yellow
EINECS No.: 209-608-2
MF: C18H16N3NAO3S
Acid Yellow



 

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