Acid Green 16 Appearance is dark green powder, soluble in water, blue-green, soluble in ethanol, green, yellow-brown in concentrated sulfuric acid, yellow after dilution.
TRADE NAME:
Acid Green V,Acid Green SIM
Key properties
- Type: water-soluble acid dye suitable for protein fibers and nylon blends
- Shade: bright, saturated green with high chroma
- Affinity: strong uptake on wool and silk; good affinity on nylon under acidic conditions
- Application: suitable for exhaust and continuous dyeing systems
- Levelness: good, responds well to common leveling agents and dyeing auxiliaries
- Fastness profile: moderate to good washfastness and rubbing fastness; lightfastness typically moderate (test for end-use)
- Solubility: fully soluble in water; stable in properly formulated acid dye baths
- Typical dye bath pH: acidic range (commonly adjusted for best uptake and shade control)
- Processing note: perform scale-up trials and wet-fastness finishing for demanding end uses
Application of Acid Green 16:
- 1. It is mainly used for dyeing and printing wool and silk. It is suitable for dyeing dark fabrics. It can also be used for coloring inks, feathers, straw, soap, paper and leather.
- 2. Wool dyeing is carried out in a strong acid bath. The pH of the dyeing bath is adjusted to 2~4, and the highest dyeing temperature is 95~100°C. Silk and nylon dyeing should be carried out in acetic acid bath or formic acid bath. Wool is the same as various fibers. When the bath is dyed, the color of nylon, silk and wool is close, and the cellulose fiber is not stained.
- 3. Acidic green V is bright in color, but its color fastness is poor. It is generally only suitable for the dyeing of wool products with high color vividness, or only for color matching. It is not suitable for products with high fastness requirements.
Technical Specifications
- CAS NO: 12768-78-4
- CI.NO: 44025
- Molecular Formula:C27H25N2NaO6S2
- Molecular Weight: 560.62
Leveling(grade) | Displacement | Whitening | Solubility(g/L) | Metal ion effect(grade) |
copper | iron | chromium |
3~4 | B | can~good | 20(90℃) | 5 | 5 | — |
Colour Fastness Test
Test Methods | fiber | Alkali resistance | Carbonization | Chlorination discoloration | Oxygen bleaching | Alkali fluff | Acid fluff | potting | soaping | Perspiration | Sun exposure |
discolor | Staining | discolor | Staining | discolor | Staining | discolor | Staining |
AATCC | wool | 2 | 3~4 | — | 1 | 2 | 2 | — | — | — | — | 2~3 | 2~3 | 3~4 | 2 |
ISO | wool | 2~3 | 3 | 3~4 | 1 | 1 | 1 | 3~4 | 1 | 1 | 1 | 3 | 3 | 4~5 | 3 |
What fibers is Acid Green 16 best suited for, and where should I avoid it?
Acid Green 16 is optimized for protein fibers (wool, silk) and shows good uptake on nylon under acidic dyeing conditions. It is not suitable for untreated cotton or cellulose fibers unless used with a dye-fixing system or pretreated substrate — for direct cotton dyeing, choose reactive or direct dyes instead.
Are there special storage or handling precautions for Acid Green 16?
Store in a cool, dry place in tightly closed containers away from strong oxidizers. Because acid dyes are water-soluble, avoid moisture ingress. Use appropriate PPE when handling powders or concentrates and follow local regulations for storage and disposal.
Will Acid Green 16 work in continuous dyeing lines or only batch processes?
Acid Green 16 can be used in both batch (exhaust) and properly configured continuous/semicontinuous systems, but continuous lines require careful control of liquor ratio, pH feed, and tension to avoid streaking. Run pilot trials to tune feed rates and auxiliary dosing before full production runs.
