Trade Name: DIRECT ORANGE 1SD · CI Number: Direct Orange 39
Orange is one of the more demanding shades to achieve consistently on cotton — it sits between red and yellow, and any imbalance in a combination recipe or variation in the substrate shows up immediately as a shade drift. Direct Orange 39 sidesteps that complexity by delivering the orange shade directly from a single-dye bath. No combination management, no two-component exhaustion rate matching. Applied from a neutral salt bath at 90–100°C, it produces a vivid, warm orange on cotton and viscose with predictable and repeatable results batch to batch. Yobai Industries supplies it as DIRECT ORANGE 1SD, shade strength and solubility verified on every lot.
The dye is economical compared to reactive orange at equivalent shade depths — wash fastness is the trade-off, which is acceptable in paper, canvas, jute, and many industrial cotton applications where the end-use laundering standard is not demanding. For apparel or home textiles, a cationic fixative after-treatment brings wash fastness to a practically useful level. In paper, Direct Orange 39 produces a clean, saturated orange at very low dosing, without requiring pH modification of the pulp slurry — an important practical advantage in paper mill operations.
Specifications are indicative. Contact us for a batch-specific TDS before placing a bulk order.
| Parameter | Value |
|---|---|
| Product Name | Direct Orange 39 |
| Trade Name | DIRECT ORANGE 1SD |
| CI Number | Direct Orange 39 |
| CAS Number | Available on request |
| Molecular Weight | Available on request (TDS) |
| Dye Class | Disazo Direct Dye (Anionic) |
| Colour | Vivid Orange |
| Appearance | Orange Powder |
| Ionic Character | Anionic |
| Solubility | Soluble in hot water (40–60°C); 30–50 g/L |
| Application pH | 7–8 (neutral bath) |
| Application Temp. | 90–100°C |
| Required Auxiliaries | NaCl or Na₂SO₄ 20–30 g/L; no acid or alkali required |
| Wash Fastness | 3–4 (4 with cationic fixative) |
| Light Fastness | 3–4 |
| 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.
Direct Orange 39 bonds to cellulose by physical adsorption — hydrogen bonds and Van der Waals forces — not by covalent chemistry. This is why wash fastness is inherently lower than reactive dyes. The cationic fixative after-treatment physically blocks the anionic dye on the fibre surface, improving wash performance without changing the dyeing process itself. Batch COA available on request.
| Property | Value / Rating |
|---|---|
| Physical Form | Orange powder |
| Bulk Density | Approx. 0.35–0.55 g/cm³ |
| Solubility in Water | 30–50 g/L at 40–60°C |
| Bath Stability | Stable at pH 7–9, 90–100°C |
| Wash Fastness (ISO 105-C06) | 3–4 (4 with cationic fixative) |
| Light Fastness (ISO 105-B02) | 3–4 |
| Rubbing Fastness — Dry | 3–4 |
| Rubbing Fastness — Wet | 3 |
| Perspiration Fastness | 3–4 |
| Chlorine Fastness | 2–3 (avoid chlorine-bleached substrates) |
Fastness ratings on 1–5 scale (5 = best). Light fastness of 3–4 is adequate for most indoor furnishing and industrial applications. For outdoor or high-UV applications, reactive orange is recommended. Batch COA available on request.
Direct Orange 39 dissolves at 30–50 g/L in water at 40–60°C. The standard pre-dissolution procedure: paste the powder with a small amount of cold water to wet the particles thoroughly, then bring up to 50–60°C with stirring. This avoids the formation of dry lumps that look dissolved but are not — and which create spot dyeing on fabric. Do not pour undissolved powder directly into the main dyebath. For paper applications where the dye is added to a pulp slurry, dissolve it completely in warm water first and then meter it into the pulp consistently.
For combination recipes with Direct Yellow or Direct Red, dissolve each component separately before combining in the stock solution. This prevents any cross-precipitation between components and gives you a stable, uniform stock.
Values apply to exhaust dyeing at liquor ratio 1:8–1:15. For knitwear or yarn, add salt in 3 stages. For paper, dosing is by weight of pulp dry matter.
| Shade Depth | Dye (%owf) | NaCl (g/L) | pH | Temp (°C) | Time (min) |
|---|---|---|---|---|---|
| Pale / Peach Orange | 0.3–0.8% | 10–15 | 7–8 | 90–100 | 30–40 |
| Medium Orange | 1–2% | 20–25 | 7–8 | 90–100 | 45 |
| Deep Orange | 2.5–4% | 25–30 | 7–9 | 90–100 | 45–60 |
| Dark Burnt Orange | 4–6% | 30–40 | 8–9 | 90–100 | 60 |
For combination recipes or non-standard substrates, contact our technical team for recipe support.
Shade depth on mercerised cotton is controlled primarily by dye concentration. The tone is a warm, vivid orange — not a muted rust or a fluorescent orange, but a clean, commercial orange that reads well on cellulosic substrates.
Request a lab dip for colour-critical end-uses. Shade appearance varies with substrate mercerisation, fibre whiteness, and water hardness. Provide water sample if dyeing in high-hardness regions.
All packs sealed in multi-layer moisture-proof bags. Custom packaging and private labelling available for bulk buyers.
All shipments include batch-specific COA. Export packing (UN-certified drums) available on request.
Store below 30°C in a covered, dry location with relative humidity below 65%. Orange dye powders absorb atmospheric moisture readily — absorbed moisture causes caking that makes accurate weighing difficult and slows dissolution. Always reseal containers immediately after weighing. Keep away from acids, oxidising agents, and chlorine compounds — these degrade the azo chromophore and cause shade drift. Avoid prolonged UV exposure; direct sunlight will shift the shade character over time.
Used across industries where a vivid orange on cellulosic substrates is required. Contact us for grade recommendations for your specific end-use.
Yobai Industries carries the following grades in this dye family. Click any grade to view specifications, or view the full catalogue →
Don't see the grade you need? We carry 250+ dye grades. Contact us and we'll source or develop it for you.
MOQ 10 kg · Samples in 24 hours · Bulk in 7–15 days · Export worldwide · GST invoice with every order.