Section
| HS Code | 171271 |
| Product Name | Disperse Blue 14 |
| Colour Index Name | C.I. Disperse Blue 14 |
| Colour Index Number | C.I. 61500 |
| Cas Registry Number | 2475-44-7 |
| Chemical Class | Anthraquinone dye |
| Molecular Formula | C14H10N2O4 |
| Molecular Weight | 270.24 g/mol |
| Appearance | Dark blue powder |
| Dye Class | Disperse dye |
| Colour Shade | Blue |
| Primary Use | Dyeing of synthetic fibers such as polyester, acetate, triacetate, nylon, and acrylic |
| Water Solubility | Sparingly soluble in water |
| Organic Solvent Solubility | Soluble in organic solvents |
As an accredited Disperse Blue 14 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged in 25 kg sealed fiber drums with moisture-resistant liners, clearly labeled for Disperse Blue 14 storage and handling. |
| Container Loading (20′ FCL) | Disperse Blue 14 is palletized, shrink-wrapped, and securely loaded into a 20′ FCL container with moisture protection and proper labeling. |
| Shipping | Disperse Blue 14 is generally shipped as a non-hazardous chemical in clean, dry, sealed containers labeled with product name, CAS number, and handling precautions. Protect from moisture, heat, and dust; verify current SDS and comply with all applicable local, national, and international transport regulations. |
| Storage | Store Disperse Blue 14 in a cool, dry, well-ventilated area away from direct sunlight, heat, ignition sources, and incompatible materials such as strong oxidizers, acids, and bases. Keep containers tightly closed, avoid dust generation, and maintain good housekeeping. Store separately from food, feed, and drinking water. Use appropriate personal protective equipment and follow local regulations. |
| Shelf Life | No specific shelf-life data are available; keep in a cool, dry, well-ventilated place and use within the supplier’s recommended period. |
C.I. Disperse Blue 14 is 1,4-bis(methylamino)anthraquinone (CAS 2475-44-7; C.I. 61500). In high-temperature exhaust dyeing of polyethylene terephthalate, the product is predispersed under high-shear mixing at 35–45 °C. The stock dispersion contains 10–30 % dry dye by weight and 1–2 g/L anionic dispersing agent. The dispersion is screened through a 100 µm mesh before being introduced into the machine sump. Full-scale soft-flow jet dyeing normally operates at a liquor ratio of 1:8 to 1:12. The dyebath pH is buffered between 4.5 and 5.0 with acetic acid and sodium acetate. The temperature is raised at 1.5–2.0 °C/min to 130 °C and held for 30–45 min. Practical recipes for medium-depth blue shades range from 0.5 % owf to 2.5 % owf. Above 3.0 % owf, incremental colour yield drops sharply because the low water solubility of the anthraquinone derivative promotes aggregation. The exhausted substrate is reduction-cleared with sodium dithionite 2 g/L and sodium hydroxide 2 mL/L 38 °Bé at 80 °C for 20 min. The reduction-clearing operation removes surface-deposited dye and prevents crocking failure. For package dyeing of polyester sewing thread, the pump is sized to deliver 3–5 bath turnovers per minute and the package density is maintained at 0.35–0.40 kg/L. Higher package density produces channelling and measurable shade variation from core to outer layers. Batch-to-batch particle-size changes with D90 values above 5 µm are a frequent cause of filter clogging and package-to-package colour drift. Control of D90 below 5 µm is therefore standard for package dyeing. Fastness is evaluated according to ISO 105-C10:2006 for washing, ISO 105-X12:2016 for rubbing, and ISO 105-B02:2014 for light. Production-scale trials should validate fastness against the exact buyer RSL limits because published data for this specific configuration is limited.
| Parameter | Polyester HT exhaust | Thermosol pad–dry–cure | Acetate exhaust | Gravure transfer printing |
|---|---|---|---|---|
| Temperature | 130 °C, 30–45 min | 205–215 °C, 60–90 s | 75–85 °C, 45–60 min | 205–215 °C, 25–40 s |
| pH | 4.5–5.0 | 5.0–5.5 | 5.0–6.0 | Not applicable |
| Dye concentration | 0.3–3.0 % owf | 10–30 g/L pad liquor | 0.5–2.0 % owf | 3–8 wt% ink solids |
| Equipment | Soft-flow jet, package dyeing machine with 3–5 bath turnovers/min | Padder, stenter, curing oven | Winch, jigger, beam dyeing machine | Flatbed transfer press, oil-heated drum |
Pad–dry–cure is used for woven polyester–cotton workwear fabric where disperse dye and reactive dyestuffs are applied in separate stages. C.I. Disperse Blue 14 is incorporated into an aqueous pad liquor at 10–30 g/L for medium depth. The padder is set to 60–80 % expression. A migration inhibitor of the polyacrylamide or polycarboxylate type is added at 10–20 g/L to control dry-in migration during forced-air pre-drying at 100–120 °C. Non-uniform pre-drying causes unlevel blue edges and streaks because dispersed dye migrates with water to the fabric surface. The thermofixation step is carried out at 205–215 °C for 60–90 s in a stenter or curing oven. At temperatures below 200 °C, dye fixation into the polyester phase is incomplete and the subsequent reduction-clearing step removes a high proportion of unfixed dye. At temperatures above 220 °C, polyester fabric may develop yellowing and the cellulosic component loses tensile strength. Processing speed on a production stenter is typically 30–60 m/min for woven fabric of 200–300 g/m² mass per unit area. The polyester fraction is dyed by the disperse dye while the cotton fraction is later dyed with reactive or vat dye. Intermediate reduction clearing with sodium dithionite 2–3 g/L at 80 °C for 20 min removes disperse dye staining from the cotton. Final colour strength is verified by spectrophotometric CIE L* a* b* measurement with D65 illuminant and 10° observer. Fastness requirements for workwear are assessed under ISO 105-C06:2010 domestic and commercial laundering, ISO 105-X12:2016 rubbing, and ISO 105-B02:2014 light. Published data for a continuous pad–thermosol process with this exact dye is limited; initial production trials should confirm fixation yield by extraction with hot DMF.
Secondary cellulose acetate dyeing in jigger or beam equipment is confined to a lower temperature window because the fibre begins to lose surface smoothness at high temperatures. The dyebath is set at pH 5.0–6.0 with acetic acid and maintained at 75–85 °C. C.I. Disperse Blue 14 is added at 0.5–2.0 % owf from a predispersed stock. The exhaustion time for pale-to-medium blue shades is 45–60 min. The dyebath is not aggressively agitated in beam dyeing because acetate filament is pressure-sensitive under high differential head. The application is limited to pale and medium depths; deep shades require high dye loadings that compromise wet fastness. For cellulose triacetate, the same dye is applied in pressurized equipment at 110–115 °C for 45–60 min. Carrier-assisted atmospheric dyeing is possible with 2–5 g/L of a methylnaphthalene or N-alkyl phthalimide carrier, but carrier residues must be removed by hot scouring. Typical end products include acetate satin linings, decorative ribbons, and narrow woven tapes. Wet fastness is assessed with ISO 105-E04:2013 perspiration and ISO 105-C10:2006 washing. The operational boundary is the low wet fastness of disperse-dyed acetate; proximity to white or light-coloured adjacent panels should be avoided unless the crocking results meet the buyer specification.
Thermoplastic dope dyeing of polyethylene terephthalate is performed on a co-rotating twin-screw extruder with L/D ratio 40:1 and a vented barrel. The PET chip is pre-dried at 160–180 °C to a residual moisture level below 50 ppm. The dye is fed as a fine powder or a compacted granule at 0.05–0.5 wt% of the polymer flow, depending on the desired blue depth. The melt temperature is maintained at 270–290 °C. Residence time across the mixing zone is kept below 5 min. The anthraquinone chromophore of C.I. Disperse Blue 14 is relatively stable in this temperature window, but a shift in hue or loss of colour strength can occur when residence time exceeds 7 min at 285 °C. A nitrogen-blanketed feed zone is recommended to minimize thermo-oxidative degradation of the dyed polymer. The extrudate is filtered through a 20 µm sintered metal or woven disc filter before pelletizing. A filter pressure rise above 2 bar from baseline indicates dye agglomerates or insufficient dispersion. The masterbatch is diluted with undyed PET chip during downstream fibre spinning or injection moulding. Typical let-down ratios range from 1:10 to 1:50. The coloured fibre is produced on a spin line operating at 280–290 °C with a spinneret pack residence time under 3 min. Published data for this specific dye in melt-phase coloration is limited; the processing window is therefore established by pilot extrusion before scale-up.
In gravure heat-transfer printing of polyester knit, C.I. Disperse Blue 14 is formulated as a solvent-based or water-based gravure ink containing 3–8 wt% dye on ink solids. The ink is printed on a silicone-coated or polyester release paper. The transfer step is run at 205–215 °C for 25–40 s under 0.2–0.5 bar contact pressure on a flatbed transfer press or oil-heated drum. At 195 °C, transfer efficiency falls and the printed line shows reduced colour strength; at 225 °C, the polyester fabric can stiffen. The low molecular weight of the anthraquinone disperse dye allows vapour-phase diffusion into the fibre without a wet aftertreatment. However, surface dye and any residual print binder must be controlled because they directly influence crocking values. Transfer-printed polyester is generally not reduction-cleared; therefore, wet fastness depends on complete dye penetration and rapid cooling after transfer. The end products are polyester sports apparel, soft signage, and flag fabric. Fastness is checked using ISO 105-X12:2016 rubbing and ISO 105-C10:2006 washing. Published data for this specific dye in transfer inks is limited; press trials should confirm the transfer window and paper release level before routine production.
Polyamide fibre is commonly dyed with acid or metal-complex dyes, but disperse dyes are used when exceptional coverage of physical barre is required. The bath for C.I. Disperse Blue 14 is set at pH 5.5–6.5 with acetic acid and a non-ionic levelling agent at 0.5–1.5 g/L. The temperature is raised to 98–100 °C and held for 30–60 min. The dye uptake on nylon is more uniform across drawn and undrawn sections than acid dyes, but the saturation value is lower. Pale-to-medium blue shades are produced at 0.3–1.5 % owf. Above 2.0 % owf, wet fastness falls below typical narrow tape specifications. The end products include nylon 6.6 narrow woven tapes, braided cords, and automotive seat-belt edge binding. In these products, the wet fastness limitation is controlled by avoiding dark shades and by applying a synthetic tanning agent after-scour when specified. Fastness is assessed by ISO 105-E04:2013 perspiration and ISO 105-C10:2006 washing. Production dyeing machines are winch or jig types; liquor ratio is 1:10 to 1:20. High pressure is not required. The operational boundary is that C.I. Disperse Blue 14 has lower wash fastness on nylon than on polyester and is not used where severe domestic laundering is specified.
Competitive Disperse Blue 14 prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615365186327 or mail to sales3@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615365186327
Email: sales3@liwei-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Technical grade C.I. Disperse Blue 14 (C.I. 61500; CAS 2475-44-7; 1,4-bis(methylamino)anthracene-9,10-dione; C16H14N2O2; molecular weight 266.29 g/mol) is supplied as a dark blue powder, low-dust granule, or aqueous dispersion. The product is an anthraquinone disperse dye used for polyester, cellulose acetate, and nylon secondary coloring. Commercial strength designations are typically 100% and 200% relative to the C.I. reference, with 40–50% non-settling liquid forms used for metered dosing in automated color kitchens. Model identifications are manufacturer-specific; the invariant descriptors for the product are the C.I. designation, CAS registry number, and chemical structure.
Because the chromophore is anthraquinone rather than azo, the product exhibits a greenish-blue shade with lower molar extinction coefficient than high-strength azo blues. The absorption maximum in acetone is approximately 590 nm; exact shade on polyester varies with draw ratio, heat-set temperature, and dye concentration. Melting point of the dry colorant is reported between 220 °C and 222 °C for the purified chemical.
| Property | Method | Range or limit |
|---|---|---|
| Strength relative to C.I. reference | Spectrophotometry in acetone at λmax 590 nm | 100 ± 3% or 200 ± 3% |
| Moisture content | ISO 787-2, 105 °C, 1 h | ≤ 1.0% |
| Residue on 45 µm sieve | ISO 787-7 | ≤ 0.5% |
| pH of 5% aqueous dispersion | ISO 787-9 | 6.0–8.5 |
| Dispersion stability after 130 °C circulation | Internal filter test, 5 µm polypropylene | ≤ 0.2% retained residue |
Powder and granular grades are produced by wet milling followed by spray drying or spray granulation. The dispersion medium is typically a sodium lignosulfonate or polynaphthalene sulfonate condensate; dispersant content can be 30–50% of the final powder mass for standard strength grades. Finished primary particle size is controlled to a median diameter of 1–2 µm with a 95th percentile below 5 µm by laser diffraction after 5 min ultrasonic dispersion. Overmilling increases surface energy and can cause re-agglomeration during storage at relative humidity above 60%; pre-drying of opened containers is recommended in tropical environments. Low-dust granules break down under high-shear dye preparation at 500–1000 rpm. Liquid forms have viscosity 100–500 mPa·s at 25 °C and require storage between 5 °C and 40 °C because freeze-thaw cycles cause irreversible coagulation.
Color strength is determined by spectrophotometry in acetone at 590 nm against a reference lot; a typical solution concentration is 0.02 g/L with a 1 cm path length. On polyester, reflectance minima in the red region produce the blue shade; the exact reflectance minimum and visual depth depend on fiber denier and delustering agent content. In bright polyester containing 0.3% TiO2, visual depth may be 10–15% lower than in full-dull fabric at the same dye loading.
At 130 °C exhaust dyeing, the product is dispersed in water with 1–2 g/L polynaphthalene-sulfonate dispersant and an acetic acid/sodium acetate buffer at pH 4.5–5.5. Saturated steam pressure in closed equipment at 130 °C is approximately 270 kPa absolute; therefore atmospheric beam machines cannot maintain the required temperature. The dyebath is ramped at 1.5–2.0 °C/min to 125–135 °C and held for 30–45 min. In package dyeing machines with pump reversal every 30–60 s, differential pressure rise above 0.5 bar indicates agglomeration and requires a reduction in heating rate, additional dispersant, or improved pre-dispersion. Uptake onto polyester is diffusion-controlled; below the wet glass transition of approximately 70–80 °C, dye uptake is negligible. Above 100 °C, exhaustion becomes temperature-dependent and batch-to-batch differences in polyester crystallinity, typically 30–50%, can shift final depth by 5–10% at identical dye concentration.
For pale shades at 0.5% owf, exhaustion can reach 85–90%; for deep shades at 2.5% owf, exhaustion may fall to 70–80% unless the liquor ratio is reduced below 15:1. Liquor ratio 10:1 to 20:1 is common in jet dyeing. Production-scale lots of 100–500 kg have shown filtration tendency if the metered liquid predispersion is allowed to exceed 45 °C before injection; a dosing line temperature of 35 °C reduces filter-blocking on 5 µm in-line filters. In yarn package dyeing with density 0.38–0.42 g/cm3, flow rate is typically 30–40 L/kg/min to avoid channeling and unlevel dyeing.
Reduction clearing is performed with 2 g/L sodium hydrosulfite and 2 g/L sodium hydroxide at 70–80 °C for 20 min. Prolonged clearing above 85 °C or holding times longer than 30 min can cause partial reductive conversion of the anthraquinone carbonyl groups to leuco form, producing shade dulling and loss of chroma. If the subsequent heat-setting step exceeds 180 °C for 30 s, thermomigration can carry dye to the fiber surface; the resulting wet fastness loss under ISO 105-C10 is typically 0.5–1.0 grade. For dark shades destined for hot pressing or transfer printing, 1–2 g/L of a nonionic thermomigration inhibitor is added to the finishing bath.
The product is incompatible with hypochlorite-based oxidative post-treatments and with strong reducing agents in acidic media because anthraquinone derivatives may undergo ring degradation. Avoid contact with iron or copper ions in the dyebath because metal-complex formation shifts shade and reduces brightness. The use of cationic after-treatment agents in the same bath without intermediate rinsing can precipitate residual dispersant and cause surface deposits. Published data for the specific thermomigration behavior of C.I. Disperse Blue 14 in soft-touch silicone finishes is limited; therefore production trials should be scoped before full-scale application.
In acetate secondary dyeing on jigger and beam machines, the dyebath is held at 75–85 °C and pH is maintained between 5.0 and 6.5 with monosodium phosphate. Typical dye addition is 0.5–2.5% owf for pale to medium depths. The low aqueous solubility of the dye, approximately 0.05 mg/L at 25 °C, makes dispersion maintenance more critical than concentration accuracy; nonionic wetting agents above 0.5 g/L can partly dissolve the dye and destabilize the dispersion. On nylon 6 and nylon 66, the anthraquinone structure yields moderate wash fastness but limited build-up; typical dyeing at 98–100 °C with pH 5.0–6.0 gives pale-to-medium blues only. Deep shades require after-fixation with synthetic tanning agents and are generally less economical than acid blue alternatives.
In continuous pad-dry-thermosol processing, a padding liquor containing 30–50 g/L dye, 10–15 g/L anti-migration agent, and 0.5–1.0 g/L wetting agent is applied at 55–65% pickup on polyester–cellulosic blend fabric. Drying at 100–120 °C to residual moisture 8–10% is followed by thermofixation at 190–210 °C for 60–90 s. The anthraquinone chromophore survives this fixation window, but above 210 °C shade strength may decrease by 5–10% due to sublimation. Compared with C.I. Disperse Blue 79, an azo blue, C.I. Disperse Blue 14 exhibits lower build-up on polyester and higher raw-material cost, but may be selected for its greenish-blue shade and lower reductive fading in acetate blends. In polyester–cellulosic blends, cross-staining onto cotton under alkaline reduction clearing is typically lower than selected benzodifuranone or azo blue products.
| Property | C.I. Disperse Blue 14 | C.I. Disperse Blue 56 | C.I. Disperse Blue 60 |
|---|---|---|---|
| C.I. designation | 61500 | 63285 | 61104 |
| Recommended dyeing temperature | 125–135 °C | 125–135 °C | 125–135 °C |
| Reduction clearing temperature limit | 80–85 °C | 80–85 °C | 80–90 °C |
| Primary shade character | greenish blue, bright | blue, neutral | reddish blue, bright |
| Typical use depth | 0.5–2.5% owf | 0.5–4.0% owf | 0.5–5.0% owf |
Unlike solvent-soluble anthraquinone blues used in plastics, C.I. Disperse Blue 14 is surface-coated with dispersing polymers. Converting it to a solvent dye requires stripping the dispersant, which may reduce milling performance in polyolefin masterbatch. The colorant chemistry may overlap with solvent blue grades, but the surface treatment and particle-size distribution differ substantially. In transfer printing, C.I. Disperse Blue 14 is incorporated into gravure inks for polyester transfer paper at 2–5% dye content. Transfer conditions of 200 °C for 30 s are used; transfer yield is lower than for selected low-molecular-weight azo dyes because of the higher molecular weight and anthraquinone sublimation barrier.
Under REACH, CAS 2475-44-7 may be subject to registration and classification obligations depending on annual tonnage; downstream users should verify supplier safety data sheets. No food-contact status is implied by the C.I. listing. Dust from powder handling should be controlled as general inert dye dust; local exhaust ventilation and particulate filtration are used on production lines where dust is generated. The product should be stored in closed containers below 40 °C and protected from moisture, direct sunlight, and contact with oxidizing materials.
