Trade Name: ACID GREEN · CI Number: Acid Green 25
Acid Green 25 is a bright, brilliant green anthraquinone acid dye with excellent levelness and good light fastness. It is the standard choice for bright green shades on wool, silk, nylon, and leather where colour brightness and fastness are both important. Unlike azo-based greens which tend toward yellow or blue bias depending on shade depth, AG25 produces a clean, neutral bright green that reads consistently across the range from pale mint to deep forest.
The anthraquinone chromophore in AG25 is the source of its key performance advantage: a light fastness rating of 5–6 compared to just 3–4 for most azo green dyes. This difference is inherent to the dye chemistry — not improvable through auxiliaries — and makes AG25 the correct choice for outdoor upholstery, automotive seat fabric, sportswear, and any application where colour stability under UV or prolonged daylight is a specification requirement.
In practice, AG25 exhausts efficiently on wool and nylon at pH 3–5 under standard levelling acid dye conditions. For silk, temperature must be limited to 82–85°C with ammonium sulphate. In trichromatic recipes, it serves as the green component in olive and forest shade sequences alongside Acid Brown 83 and Acid Yellow 42. Yobai Industries supplies Acid Green 25 batch-tested for colour strength and shade match before every dispatch.
Specifications are indicative. Contact us for a batch-specific TDS before placing a bulk order.
| Parameter | Value |
|---|---|
| Product Name | Acid Green 25 |
| Trade Name | ACID GREEN |
| CI Number | Acid Green 25 |
| CAS Number | 4403-90-1 |
| Colour | Bright Green |
| Appearance | Green Powder |
| Ionic Character | Anionic |
| Solubility | Soluble in hot water. |
| Molecular Weight | ~622 g/mol |
| Dye Class | Acid Dye |
| Sub-class | Levelling Acid Dye (Anthraquinone) |
| Application pH | 3–5 |
| Application Temp. | 90–100°C |
| Required Auxiliaries | Acetic acid to pH 3–5; sodium sulphate (10–20 g/L); ammonium sulphate may be added for improved levelness |
| Wash Fastness | 4–5 |
| Light Fastness | 5–6 |
| Packaging | 1 kg · 5 kg · 10 kg · 25 kg · 50 kg · Custom packaging available |
| Shelf Life | 5 years from manufacture (cool, dry storage) |
| Manufacturer | Yobai Industries, Sayakha, Gujarat, India |
| GSTIN | GST Registered |
Need a full TDS, COA, or MSDS? Request it here or WhatsApp us directly.
General guide for exhaust dyeing on wool and nylon. For silk, limit temperature to 82–85°C and use ammonium sulphate instead of acetic acid.
| Shade Depth | % owf | Acetic Acid (pH) | Na₂SO₄ (g/L) | Temp (°C) | Time (min) |
|---|---|---|---|---|---|
| Pale Mint | 0.1–0.5% | pH 4.5–5 | 10–15 | 90 | 30 |
| Bright Green | 0.5–1.5% | pH 4–5 | 15–20 | 95 | 45 |
| Forest Green | 1.5–3.0% | pH 3.5–4.5 | 15–20 | 100 | 60 |
| Hunter Green | 3.0–5.0% | pH 3–4 | 20 | 100 | 60–75 |
% owf = percentage on weight of fibre. For silk, limit temperature to 82–85°C and use ammonium sulphate at pH 4.5–5.
Representative shades on wool under standard exhaust conditions. Actual colour varies with substrate, pH, and auxiliaries.
Store in a cool, dry location below 30°C. Keep containers tightly sealed, away from moisture, direct sunlight, and strong oxidising agents. Do not store near alkaline materials. Check that packaging is intact before use.
This dye is used by manufacturers across the following industries. Contact us with your specific application for a grade recommendation.
Yobai Industries carries the following grades in this dye family. Click any grade to view specifications, or view the full catalogue →
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MOQ 10 kg · Samples in 24 hours · Bulk in 7–15 days · Export worldwide · GST invoice with every order.