Acid dyes

Acid dyes are used to dye protein fibers such as wool, angora, cashmere, and silk, as well the milk protein fiber called Silk Latte, the soy protein fiber called Soy Silk, and the synthetic polyamide fiber nylon. 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 some 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 Solvent dyes, while others are even safe enough to eat, and are sold as food coloring.

Acid dyes

SL:	Dyes Type - Name	Color index	Trade Name	CI Number
01	Acid-Red	33	Azo Fuchsine	17208
02	Acid-Red	26	Scarlet 2R	16150
03	Acid-Red	14	Carmosine Conc	14720
04	Acid-Red	1	ABCOL® Fast Crimson G	18050
05	Acid-Red	na	ABCOL® Phenol Red WS	None
06	Acid-Orange	52	Methyl Orange	13025
07	Acid-Orange	24	Brown Y Conc	20170
08	Acid-Orange	10	Orange 2G	16230
09	Acid-Orange	7	Acid Orange II crude	15510
10	Acid-Green	40	Green F-BL	None
11	Acid-Green	25	Alizarine Cyanine Green G	61570
12	Acid-Green	1	Napthol Green B	10020
13	Acid-Brown	322	Olive Brown N	None
14	Acid-Red	52	Rhodamine B	45100
15	Acid-Red	66	Red 3B Conc	26905
16	Acid-Red	73	ABCOL® Croceine Scarlet MOO	27290
17	Acid-Red	87	ABCOL® Eosine	45380
18	Acid-Red	87	ABCOL® Eosine - Certified	45380
19	Acid-Red	88	Fast Red ALS	15620
20	Acid-Red	388	ABCOL® Rhodamine WT-Liquid	None
21	Acid-Violet	49	Violet 4 BNS Ex. Conc	42640
22	Acid-Yellow	17	Yellow 2G Conc	18965
23	Acid-Yellow	23	Tartrazine	19140
24	Acid-Yellow	36	Metanil Yellow	13065
25	Acid-Yellow	73	ABCOL® Uranine Powders & Liquids	45350
26	Acid-Yellow	99	Yellow GR	13900
27	Acid-Yellow	216	Fast Yellow A 3G	None
28	Acid-Black	10	Black 10 BR-126%	20470
29	Acid-Black	24	Milling Black 2 BNS	26370
30	Acid-Black	2	Nigrosine O2P	50420
31	Acid-Blue	90	Brilliant Cyanine Blue G	42655
32	Acid-Blue	1	Patent Blue VF	42045
33	Acid-Blue	9	Blue NB	42090
34	Acid-Blue	7	Patent Blue A Conc	42080
35	Acid-Blue	20	Induline Blue B X	50405
36	Acid-Blue	80	Brilliant Blue RAWL	61585
37	Acid-Blue	25	ABCOL® Brilliant Blue RB	62055
38	Acid-Blue	34	Blue GOV	42561
39	Acid-Blue	29	Blue G	20460
40	Acid-Blue	27	Alizarine Blue B	61530