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HS Code |
663068 |
| Chemical Name | Acid Brown 75 |
| Cas Number | 6834-26-6 |
| Molecular Formula | C18H14N5NaO6S2 |
| Molecular Weight | 499.45 g/mol |
| Appearance | Brown powder |
| Solubility | Soluble in water |
| Dye Class | Acid dye |
| Color Index Number | C.I. 30045 |
| Application | Textile dyeing, especially wool and silk |
| Light Fastness | Moderate |
| Ph Range | 4-5 |
| Melting Point | Decomposes |
| Synonyms | C.I. Acid Brown 75, Yamamoto Brown 2R |
| Maximum Absorption Wavelength | 470 nm |
| Storage Conditions | Store in cool, dry place |
As an accredited Acid Brown 75 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | The packaging for Acid Brown 75 is a 25 kg net weight fiber drum with a secure plastic inner lining, clearly labeled. |
| Shipping | **Shipping of Acid Brown 75:** Acid Brown 75 should be shipped in tightly sealed, clearly labeled containers, protected from moisture and direct sunlight. The chemical must be handled according to safety regulations, requiring appropriate hazard labeling and documentation. Avoid exposure to incompatible materials. Transport in accordance with local, national, and international regulations for hazardous substances. |
| Storage | **Acid Brown 75** should be stored in a tightly closed container in a cool, dry, and well-ventilated area, away from incompatible substances such as oxidizing agents. Protect it from moisture and direct sunlight. Ensure containers are clearly labeled and avoid generating dust. Use appropriate personal protective equipment when handling. Keep away from food, drink, and animal feed. |
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Purity 98%: Acid Brown 75 with a purity of 98% is used in wool dyeing, where it provides uniform coloration and minimizes impurities in the final fiber. Molecular Weight 617.5 g/mol: Acid Brown 75 with a molecular weight of 617.5 g/mol is applied in silk textile processing, where it ensures consistent penetration and shade reproducibility. Stability Temperature 120°C: Acid Brown 75 exhibiting stability up to 120°C is used in high-temperature nylon dyeing, where it maintains colorfastness and thermal resistance. Water Solubility 30 g/L: Acid Brown 75 with water solubility of 30 g/L is utilized in leather coloring baths, where it offers rapid dissolution and homogeneous dispersion. pH Range 3-5: Acid Brown 75 effective within a pH range of 3-5 is used in the dyeing of feathers, where it supports optimal fixation and brilliance of color. Melting Point 255°C: Acid Brown 75 with a melting point of 255°C is employed in synthetic fiber dyeing, where it prevents premature degradation and ensures stable processing. Particle Size ≤10 µm: Acid Brown 75 refined to particle size ≤10 µm is used in ink formulations, where it delivers smooth texture and stable suspension. Dye Strength 98%: Acid Brown 75 with dye strength of 98% is used in paper tinting, where it achieves high color intensity with minimal dosage. |
Competitive Acid Brown 75 prices that fit your budget—flexible terms and customized quotes for every order.
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Years of working with colorants have taught us a great deal about the challenges and opportunities in textile and leather processing. Acid Brown 75 stands out through its consistent performance on wool, nylon, silk, and blended fabrics. Operating a manufacturing line means seeing first-hand how a dye interacts with diverse fibers. Not every dye behaves the same way, especially under the intense workflows demanded by textile mills. We witness the daily requirements for color fastness, ease of use in continuous dyeing, and dependable stock. Based on this experience, Acid Brown 75 has proven to deliver reliable brown shades, needed by both large mills and smaller specialty producers.
The chemical structure of Acid Brown 75 allows for strong affinity with protein fibers such as wool and silk. This matters because textile finishers depend on dyes that grip to the fiber and stay put through repeated wet processing. Our own production runs show minimal color loss after washing or light exposure. Several operators have come to prefer this dye because bath exhaustion rates reach acceptable levels without excessive salt or acid adjustments. We synthesize each batch in controlled conditions, monitoring particle size and free acidity, ensuring reproducible results. Our technical staff regularly run sample dyeings to check dispersibility and shade strength, going beyond what a typical distributor would report. This effort translates directly to fewer complaints and less re-work in our customers’ finishing plants.
We manufacture Acid Brown 75 to a target purity specified by market needs, maintaining tight controls on by-products and insolubles. Our QC teams check color strength and pH halfway through production and again at final packaging. This approach has reduced inconsistencies and given us the ability to supply both standard-strength and custom-concentrated forms. Years of production capacity upgrades have let us offer not only the regular powder but also a granulated version, preferred by some users for better dust control. In some sectors, demand has shifted toward low-sodium grades, which we supply after extensive process adaptation. Many customers have strict guidelines concerning heavy metal traces—our experience in analytical monitoring lets us meet those requirements reliably. We do not rely on third-party blends and maintain our raw material sourcing traceability to address any regulatory or customer concern directly. The finished Acid Brown 75 aligns with industry standards, but our frequent internal testing often sets a stricter bar.
There is no substitute for running a real dyehouse. Installation of automated dosing and temperature controls in our test labs has allowed us to push Acid Brown 75 to its operational limits. In jet dyeing, results show optimal liquor ratios typically do not require over-compensation. With pressure from the apparel sector to shorten batch times, we’ve tuned this dye to ensure level shades even with fast ramp-up rates. Where some brown dyes tend to shift hue under short dwell periods, Acid Brown 75 shows robust red-to-yellow ratios, giving stable output. For piece dyeing, careful pH adjustment near 4.5 yields the strongest uptake, saving both time and auxiliary usage.
We’ve tracked customer feedback from furniture leathers and uniform textiles, where both color solidity and process flexibility are crucial. Even after years in the market, inquiries focus mostly on migration and bleed issues. Our data shows Acid Brown 75 releases less than one-tenth the quantity of competitor products in standardized crocking. This means garment makers spend less on post-treatment and aftercare, and gain more trust in brand quality. Small-batch accessory makers still value this dye for its easy measuring and dosing, since powder flows smoothly and dissolves without the clumping found in less-refined grades.
We handle more than a dozen brown dyes on our production lines. While there are cheaper alternatives, not all maintain clarity or resistance during fast-wash applications. Colleagues in our development team highlight that some brown acid dyes, though vivid on swatches, lose intensity when processed in scale. This aspect does not show on small lab dips but soon becomes apparent in mill runs, especially where large lot sizes are routine. Acid Brown 75’s hue profile tends to avoid the dull, muddy undertones that lead to production waste.
Blending is another area where Acid Brown 75 provides distinct advantages. In both print paste and exhaust dyeing, it mixes cleanly with acid blues, reds, and yellows. Unlike certain analogues, it does not trigger unwanted shade shifts or precipitation during multi-color work. Large garment factories report back to us on batch-to-batch repeatability. It is easier to maintain continuity of color from lot-to-lot, reducing the burden of shade correction. Unlike “universal” brown dyes that try to fit every purpose and end up fitting none particularly well, Acid Brown 75 fits the specific requirements from moquette upholstery to fine wools.
Textile finishers concerned about environmental loads have asked for more information on water treatment compatibility. Our production logs provide detailed records on solubility and waste minimization for Acid Brown 75. The dye’s non-foaming character stalls less frequently in continuous finishers. Resulting effluent, measured in our in-house labs, generally requires less coagulant for removal than higher-metal-content or mordant dyes. We share these findings with clients planning sustainability upgrades, helping them balance legislative requirements with production costs.
Visitors on technical tours often ask about the best methods to avoid common issues like streaking and unlevel dyeing. Our hands-on trials show that Acid Brown 75 performs well in baths adjusted for lower hardness. In many regions, process water quality fluctuates, but this dye has tolerated such swings better than less-adapted products. Plant operators who manage steam flow and bath cycling see fewer problems due to strong solubility and low residue formation. These features matter in busy dyehouses, where downtime from cleaning clogged lines eats into profit and delivery schedules. We aim for operational simplicity, knowing from our own experience the cost of frequent maintenance.
Some customers have strict demands for safety and workplace exposure. We designed our packing to reduce dust in handling, with fine granule options and bulk loaders for large-scale operations. Air sampling during packaging runs has confirmed lower airborne dye than prior open-sack methods. This helps mills comply with stricter workplace standards and keeps operators safer during long shifts. Improvements like this often go unnoticed by outside observers but make daily factory life more manageable.
Sustainability pressures have shifted how clients pick dyes. Acid Brown 75 has been reformulated in-house over the years to help mills keep up with lower salt demands and restricted substance lists. As cities enforce tighter discharge rules, our process chemists have adjusted wetting agents and dispersants to minimize environmental load without reducing color quality. Test runs on closed-loop systems show good compatibility, allowing mills to recover more water and cut treatment costs.
Our R&D teams run annual reviews to track shifts in both local and international regulations. We communicate findings to our clients, supporting clear documentation that stands up to audits. Rau materials are sourced only from suppliers with transparent histories—a decision rooted in lessons learned from past supply chain disruptions. We have declined to import materials from sources with inconsistent traceability, knowing how such choices have burned entire production calendars before. By emphasizing safe chemistry and full ingredient listing, we address root-cause risks, not just symptoms.
Not every batch goes smoothly, and regular factory life brings up equipment breakdowns, material shortages, and even seasonal humidity swings. Acid Brown 75 responds to such variables with more forgiveness on color migration during uneven drying, which we confirm through our own in-plant tests. If an unexpected moisture increase pops up, the granulated form disperses better than unground powder, making rework easier. These are details many procurement departments overlook, but they heavily impact process control on the floor. As a dye house, we work closely with chemical engineers at mills, not just their buyers, so that unexpected issues can be tackled with practical, tested solutions, not guesswork.
Regulatory concerns around hazardous chemicals put increasing scrutiny on dye content. Our internal team regularly screens for regulated amines and residual metals. We have invested in process changes—new reactor linings, in-line washing, stricter batch record-keeping—so we can maintain compliance without frequent recalls or re-testing. These changes may increase direct costs but offset even bigger losses from regulatory shutdowns or lost customer confidence. Experience on the production side teaches us such investments are worthwhile, even when competitors cut corners for price advantage.
We take field reports seriously. Feedback from the plant floor comes back to our technical support desks, often describing very specific production issues. Where a shade mismatch appears, samples return to our labs for comparison with archived standards. This ongoing exchange means Acid Brown 75 evolves in small but meaningful ways year after year, guided by real process data—not just marketing claims. We prioritize fact-based improvements: less dust, shorter dissolution times, clearer technical flyers written for factory techs rather than office staff.
Nearly every large customer visits our site before placing major contracts. They inspect our container loading, review batch sheet records, and watch the QC process in person. We see trust built through transparency—open doors, responsive record sharing, and willingness to discuss problems frankly. As a manufacturer, we keep these standards consistent, whether supplying 50-kg test lots or full container shipments. Over time, these practices have allowed us to support not only regional mills but also multinational groups with demanding auditing procedures.
Real-world production brings more pressures than any spec sheet can predict. Dye performance during lab trials may not match results seen in large batches, so we use our own plant as both test ground and demonstration site. Consistency batch-to-batch tops every priority list, and Acid Brown 75 has demonstrated lower shade drift over production cycles, as confirmed in testing logs and customer audits. Not all brown dyes offer this benefit; sharper price points often come at the cost of reproducibility or regulatory headaches down the line.
The specific shade of Acid Brown 75 gives a clear, reddish-brown finish on natural fibers, favored by mills specializing in woolen suiting and uniform production. Niche segments, like automotive trim and technical textiles, value the dye’s ability to maintain color under repeated mechanical stretching, which our stretch simulations have tracked and recorded. Feedback from these sectors has helped us refine the grind and check stability under accelerated aging tests, making sure the product performs even under tough end-use conditions. It’s these field-proven details that set our offering apart from alternatives, providing the sort of peace of mind only true manufacturer experience can supply.
Years of firsthand production with Acid Brown 75 has taught us to address performance, safety, and sustainability challenges head-on. Our approach reflects daily realities in dyeing, finishing, and customer logistics. Whether facing urgent restocks, regulatory reviews, or tight shade matching, our staff relies on real production data, not marketing speak. Acid Brown 75 remains a dependable, practical choice for processors who value consistent color, straightforward plant operation, and partnership rooted in technical expertise rather than empty claims. We know the dye business rewards precision, adaptability, and above all, honesty—qualities we uphold in every ton we manufacture.