Eriochrome Black A
- CAS NO.：3618-58-4
- Empirical Formula: C20H12N3NaO7S
- Molecular Weight: 461.38
- MDL number: MFCD00054390
- EINECS: 222-807-9
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:17:48
What is Eriochrome Black A?
Preparation
4-Amino-3-hydroxy-7-nitronaphthalene-1-sulfonic acid diazotization, and Naphthalen-2-ol coupling.
Properties and Applications
blue light gray to black. Black powder. Soluble in water for navy blue, in the water solubility 60 g/l (80 ℃), slightly soluble in ethanol and Acetone. In concentrated sulfuric acid for blue, yellow after diluted into light brown; In concentrated nitric acid for red orange. Its aqueous solution for navy blue, join concentrated hydrochloric acid to pale yellow light brown; Join strong caustic into orange brown. Dyeing wool in nitric acid into black light purple, and have a slight white streaks. Mainly used for wool fabric dyeing, also can be used for silk and nylon dyeing, also can be used for wool and a variety of fiber blended fabric dyeing, can be in acetic acid chromium pretreatment of wool fabric direct printing. Also used in the leather dyeing.
| Standard | Ironing Fastness | Light Fastness | Fulling | Persperation Fastness | Soaping | Water | |
| Alkali | Acid | ||||||
| ISO | 4-5 | 5 | 4-5 | 5 | 5 | 5 | |
| AATCC | 4-5 | 4-5 | 5 | 5 | 5 | ||
Properties of Eriochrome Black A
| form | powder to crystal |
| Colour Index | 15710 |
| color | Red to Dark blue to Black |
| EPA Substance Registry System | 1-Naphthalenesulfonic acid, 3-hydroxy-4-[(2-hydroxy-1-naphthalenyl)azo]-7-nitro-, monosodium salt (3618-58-4) |
Safety information for Eriochrome Black A
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. |
Computed Descriptors for Eriochrome Black A
Eriochrome Black A manufacturer
New Products
Cyclopropane-1,1-dicarboxylic acid Cefuroxime EP Impurity-A N-Nitroso hydroxy Cetrizine EP Impurity-A Noradrenaline EP Impurity D/Noradrenaline Methyl Ether Cetirizine EP Impurity A/Cetirizine CBHP Impurity Lantanoprost rc B Clidinium Bromide Impurity tert-Butyl (2S)-[1-amino-3-(4-iodophenyl)-1-oxopropan-2-yl]carbamate 4-amino-2-fluoro-N- methylbenzamide 5-Chloro-3- Methyl -1,3-2-benzoxazol-2(3H)-one N-(2-chloropyrimidin-4-yl)-N,2,3- trimethyl-2H- indazol 6-amine N-Boc-1,4-butanediamine 4-Bromo-2-fluoro-N-methylbenzamide valeronitrile 3-chlorobenzyl cyanide 3,4 Dimethoxy Benzylcyanide 3,4 Diethoxy Benzylcyanide 2-Chloro Benzylcyanide 3-Hydroxypropionitrile 5-azidovalericacid 6,6'-bis(difluoromethoxy)-2,2'-bis((3,4-dimethoxypyridin-2-yl)methylsulfinyl)-1H,1'H-5,5'-bibenzo[d]imidazole (1-((2'-(2-((1-((2'-(2H-tetrazol-5-yl)biphenyl-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methyl)-2H-tetrazol-5-yl)biphenyl-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methanol (1-((2'-(1-((1-((2'-(2H-tetrazol-5-yl)biphenyl-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methyl)-1H-tetrazol-5-yl)biphenyl-4-yl)methyl)-2-butyl-4-chloro-1H-imidazol-5-yl)methanol (4-Methoxyphenyl) hydrazine HydrochlorideRelated products of tetrahydrofuran
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