Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing admin@sinochem-nanjing.com 3389378665@qq.com
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Acid Blue A

    • Product Name Acid Blue A
    • Alias Patent Blue A
    • Einecs 205-130-8
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry admin@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
    VTB
    Specifications

    HS Code

    300912

    name Acid Blue A
    CAS_number 4433-79-8
    molecular_formula C37H34N2Na2O9S3
    molar_mass 822.85 g/mol
    appearance Blue powder
    solubility_in_water Soluble
    dye_class Acid dye
    IUPAC_name Disodium 8-(4-anilinophenyl)-5-(4-anilinonaphthalen-1-yl)-7,8-dihydronaphthalen-1-yl-6-diazenyl-1,3,5-naphthalenetrisulfonate
    color_index C.I. 42755
    uses Biological staining, textile dyeing
    melting_point Decomposes
    storage_conditions Store in a cool, dry place
    hazard_statements May cause skin and eye irritation

    As an accredited Acid Blue A factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Acid Blue A is packaged in a 100-gram sealed amber glass bottle with a secure screw cap and clear hazard labeling.
    Shipping **Description:** Acid Blue A should be shipped in tightly sealed containers made of compatible material, protected from moisture and light. It must be labeled according to hazard regulations, handled by trained personnel, and stored in a cool, dry place. Follow all applicable transportation guidelines for hazardous chemicals to ensure safe delivery.
    Storage Acid Blue A should be stored in a tightly closed container in a cool, dry, and well-ventilated area away from incompatible substances such as strong oxidizers and bases. Protect it from moisture, direct sunlight, and sources of ignition. Proper labeling and secure placement to prevent spillage are essential. Ensure suitable containment to avoid environmental contamination and wear appropriate protective equipment during handling.
    Application of Acid Blue A

    Applications of Acid Blue A in Industrial Manufacturing

    Acid Blue A serves as a specialized colorant in several mature industries, selected for its controlled solubility, vivid color yield, and precision dosing in aqueous systems. As a direct manufacturer, we ensure that each supply meets strict process and compliance benchmarks for large-scale applications requiring proven performance under regulated environments. The following sections describe downstream uses across primary industrial sectors with technical guidance on standards, dosing, integration steps, and typical finished products.

    1. Textile Dyeing and Finishing for Cellulosic Fibers

    Textile dyers use Acid Blue A for consistent coloration of rayon, viscose, and some blended polyester/cellulose fibers, especially where deep blue hues and high wet fastness are critical. Dyehouses dose the colorant in exhaust, continuous, or semi-continuous dyeing systems, following strict process controls for liquor ratios, temperature profiling, and pH to maintain shade reproducibility and minimize effluent loads according to national standards.

    Industry compliance standards

    • OEKO-TEX® Standard 100 substance restriction lists
    • ZDHC (Zero Discharge of Hazardous Chemicals) MRSL conformance
    • REACH Annex XVII & SVHC reporting (EU)
    • GB/T 17592-2006 (China) colorant safety testing for textiles

    Typical usage ratio

    • 0.1%–3.5% pigment on fiber weight (owf), adjusted for substrate, liquor ratio, shade depth, and process (jet, pad, beam)

    Downstream process integration

    • Metering into dye baths during liquor preparation
    • Controlled addition before textile loading for exhaust systems
    • Compatibility checks with levelers and retarders for blended fabrics
    • Effluent monitoring for dye fixation efficiency compliance

    Final product types

    • Apparel textiles (shirts, uniforms, sportswear)
    • Home textiles (bed linen, upholstery)
    • Industrial filter fabrics
    • Cellulosic-based automotive textiles

    2. Paper and Pulp Coloring Applications

    The pulp and paper sector uses this dye for tinting white office paper, specialty packaging, and technical filter grades. Formulators introduce Acid Blue A in the wet-end to secure uniform distribution and minimize spots or aggregates. Blue addition helps standardize brightness or adjust shade during recycled fiber processing and is routinely applied in both alkaline and acid papermaking environments.

    Industry compliance standards

    • EN 646 (Paper and board intended to come into contact with foodstuffs – determination of color fastness)
    • FDA 21 CFR 176.170 (Components of paper and paperboard in contact with aqueous and fatty foods)
    • ISO 187 (Paper, board, and pulps – standard atmosphere for conditioning and testing)
    • Chinese Food Contact Material Standard GB 4806.8-2016

    Typical usage ratio

    • 0.005%–0.08% of dry pulp weight, tailored to target shade intensity and desired color uniformity

    Downstream process integration

    • Batchwise dilution in sizing tanks prior to headbox addition
    • Online dosage with automated control during fiber suspension mixing
    • Stability validation in recycled fiber streams
    • Compatibility evaluation with sizing agents, optical brighteners, and retention aids

    Final product types

    • Colored printing and copier paper
    • Security and semi-transparent technical papers
    • Gift wrap and decorative packaging board
    • Paper-based air and fluid filter media

    3. Industrial Detergent and Cleaner Formulations

    Many industrial detergent manufacturers utilize Acid Blue A as a functional color index for both concentrated and diluted cleaning products such as glass cleaners, floor treatments, and institutional dishwashing blends. Its high solubility, compatibility with anionic and nonionic surfactants, and resistance to fading under exposure to alkaline conditions, make it well-suited as a trace coloring agent in automatic and manual dosing solutions meeting global consumer and worker safety regulations.

    Industry compliance standards

    • EU Detergent Regulation (EC) No 648/2004
    • REACH Regulation (EC) No 1907/2006 (Annex XVII)
    • GHS/CLP Regulation (EC) No 1272/2008 for labelling and classification
    • US EPA Safer Choice Program compatibility review

    Typical usage ratio

    • 0.0005%–0.01% by total formulation weight; concentration varies based on product type (concentrate, RTU, powder) and end-use

    Downstream process integration

    • Premixing in concentrated batch blending tanks
    • In-line post-addition before bottling/filling to minimize precipitation risks
    • Compatibility and stability testing in presence of chelators and builders
    • Quality control for batch-to-batch shade consistency

    Final product types

    • Liquefied household and auto cleaning products
    • Industrial surfaces and janitorial cleaners
    • Liquid disinfectants and sanitizers for institutional use
    • Auto dishwashing and machine rinse aids

    4. Water-Based Ink and Aqueous Coating Manufacture

    Ink producers employ Acid Blue A in high-speed flexographic, gravure, and screen-printing systems where rapid dissolution, stability, and precise coloring are mandatory. The dye supports inkjet, stamp pad, and pen ink markets, offering high chroma and compatibility with waterborne resins, glycol solvents, and pH buffers. Coatings manufacturers add the dye to impart tinted sheens on water-based varnishes for wood, paper, and select plastics.

    Industry compliance standards

    • EN 71-3 (Migration of certain elements in toy inks and coatings)
    • ISO 2846-1 (Colour and transparency for printing ink)
    • US FDA 21 CFR 73 Subpart D (Colour additives for inks in indirect food contact applications; restriction-per-product basis)
    • China GB 9685 (Additive use in food-contact coatings)

    Typical usage ratio

    • 0.02%–1.0% by total ink/coating mass, based on depth of color required, substrate type, and print process viscosity adjustment

    Downstream process integration

    • Dispersal into pigment mills or pre-mix tanks
    • synchronous addition with water phase in resin let-down
    • Integration with defoamers, coalescents, and dispersants to stabilize color through shearing
    • Batch approval via lightfastness and migration testing for specialty prints

    Final product types

    • Commercial and specialty printing inks (flexo, gravure, inkjet)
    • Waterborne pigmented coatings (paper, wood, some plastics)
    • Children’s art markers and washable ink pens
    • Marking and identification fluids for packaging

    5. Agriculture: pH Indicator and Colorant in Soil Additives and Fertilizers

    Fertilizer and soil amendment producers utilize Acid Blue A both as a visual indicator for pH changes and as a distinctive product colorant. Its high water solubility and rapid response in aqueous matrices allow precise batch blending in controlled environments. The dye helps operators and end-users identify product applications and monitor limit values for soil treatment, facilitating compliance with regional agricultural regulations on additive use.

    Industry compliance standards

    • EU Fertilizer Regulation (Regulation (EU) 2019/1009)
    • ISO 7409 (Fertilizers – Marking – Requirements for labeling)
    • China NY/T 1977-2010 (Safety use guidelines for fertilizer additives)
    • US EPA 40 CFR Part 180 (Tolerance for inert ingredients in fertilizer blends)

    Typical usage ratio

    • 0.001%–0.03% by total finished blend mass, adjusted based on visual threshold and soil condition requirements

    Downstream process integration

    • Direct addition during liquid fertilizer blending in batch reactors
    • Wet coating of granular soil additives in rotating drum granulators
    • Homogeneity checks using inline spectrophotometry
    • Environmental residue analysis to confirm compliance at application sites

    Final product types

    • Liquid and soluble water-based fertilizers
    • Granular NPK soil amendments with visual identification
    • pH-sensitive soil conditioner products for agriculture
    • Specialized turf and golf course treatment blends
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    Competitive Acid Blue A prices that fit your budget—flexible terms and customized quotes for every order.

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    Certification & Compliance
    More Introduction

    Acid Blue A: Our Commitment to Reliable Dye Manufacturing

    The Story Behind Acid Blue A

    Every batch of Acid Blue A we produce carries our signature. Our team has worked for years to improve not just the consistency but the reliability of every shipment, because we know customers depend on predictable results. Dye manufacturing demands more than just knowing the right formulas. Our chemists navigate a dynamic blend of raw material fluctuations, equipment quirks, and evolving industry standards. The process rarely stays the same for long, but our guiding principle holds steady: quality is non-negotiable.

    Understanding Acid Blue A’s Properties

    Acid Blue A earns respect in the textile, paper, and leather industries for its specific combination of solubility, brightness, and affinity. Chemically, it falls under the triphenylmethane dye category. We have spent countless hours in the lab confirming that our Acid Blue A displays a strong, vivid color at pH ranges found in actual mill operations. Solubility always draws questions: ours dissolves rapidly in water at room temperature, creating a deep blue solution without clumping or residue.

    Our current model, offered in both powder and granule forms, measures a consistent strength on tinctorial scale tests. Granules suit operations prioritizing dust reduction, while powder allows fast dispersion. We examine particle size, absorption maxima, and purity in every batch record. Customers working in high-shear environments report no unexpected agglomeration. This feedback matters more than a list of specs.

    Consistent Quality Through Real-World Experience

    Lab data tells half the story. Field performance seals the deal. We routinely ship Acid Blue A to manufacturers running open width dyeing, continuous pad applications, and even exhaust processes. Our technical staff join clients on-site to compare lab results with mill reality. Shade matching always offers surprises; light sources, water quality, and mixed-fiber blends sometimes push the dye beyond the ideal. Through all of this, Acid Blue A demonstrates a robustness that newcomers in the market often lack.

    Quality checks involve more than just HPLC purity scans. We test fastness to light, alkali, and washing, because mill-reported complaints matter to us. A dye that won’t hold up to repeated laundering or UV exposure costs everyone time and money. Customers in denim finishing and uniform production have told us Acid Blue A passes the threshold for colorfastness even on blended substrates.

    Usage in Industry: Challenges and Solutions

    Textile operators prize Acid Blue A for its sharp hue and reliability on nylon, wool, and silk. Paper mills use it as a core blue in shade corrections or optical brightener mixes, citing its clean undertone without sludgy contaminants. Leather finishers look for coverage on chrome-tanned hides. In all these settings, equipment design throws up hurdles—batch tank agitation, liquor ratios, and pH swings can shift results in unpredictable ways. Our sales engineers often coach mill operators on pH control and exhaustion rates to bring out the dye’s full intensity.

    Compatibility with auxiliary chemicals marks a strong differentiator. With the wrong retarder or dispersing agent, some competitor blues face issues such as precipitation or surface streaks. Field teams testing our Acid Blue A with common salt concentrations and levelling aids documented no “baring” or streaking—evidence of why loyal mills stick with our lot certificates. We once worked with a client using unusual electrolytes in their bath; after adjusting the addition sequence and liquor flow, their line found full penetration without any streaking, even on problematic fiber blends.

    The Differences: Acid Blue A Compared to Other Dyes

    Many manufacturers have tried to replace Acid Blue A with generic substitutes or blends—hoping for lower cost or improved tonality. This move often brings surprises. Not all blue acids behave the same on fiber. Triphenylmethane and sulfonated anthraquinone dyes both offer blue shades, but the build, clearing, and compatibility differ. Acid Blue A stands distinct in its ease of wash-off and high tinctorial strength. Customers report far fewer processing adjustments compared to using basic dyes or less pure acid blue alternatives.

    End product requirements keep evolving. A dye prized for brilliance five years ago now must hold up against new washing protocols, stricter wastewater restrictions, and closer shade tolerances thanks to digital color matching. Our teams re-test every incoming raw material shipment, knowing a small input quality drop can create downstream headaches for everyone from the machine operator to brand QA in another country. We refuse to dilute our standards with fillers or cost-cutters—the marketplace has punished that thinking too often, leaving products with subpar rewash performance or multi-lot color drift.

    Meeting Specifications Through Hands-On Operation

    We believe specifications come alive only through hands-on production. Particle size, dye content, and pH all mean something different once they hit a dye vat running full shift. Each batch receives more than just lab signoff—it earns attention on the shop floor and feedback from operators who have learned exactly how Acid Blue A flows, foams, and builds depth on fabric. Most production stops on Acid Blue A relate to pH fluctuation or mechanical issues, not the dye. If shade targets slip in a real dyehouse, we investigate in person and take responsibility. We have replaced entire lots when the delivery condition did not meet our standards, regardless of paperwork.

    Buyers often ask about heavy metal content. Our sourcing crew checks upstream suppliers to minimize trace metals that regulators scrutinize. We routinely participate in third-party audits and submit samples for independent verification. This ensures our stated values match actual content. Sustainability trends push us toward cleaner process water and lower salt discharge, inspiring us to adjust manufacturing methods without losing color value or shelf life.

    Supporting Our Partners Through Technical Collaboration

    We don’t expect customers to “just use” Acid Blue A without guidance. Long-term clients describe us as partners, not just suppliers. When shade drift shows up in a batch, we do not deflect blame to the operator or machine. We send technical teams to mills and help run trials. Sometimes, shifting the dissolve temperature by ten degrees makes the difference between success and rework. We have developed pre-blended solution packages for customers scaling up (or down) production, reducing both transition waste and operator errors.

    No detail proves too minor in these collaborations. Some mills using recycled fiber discovered subtle differences in dye take-up. We worked alongside their staff to recalibrate pH and salt curves instead of recommending a different product. We know profits depend on avoiding rework—even a few hours of downtime hits bottom lines hard.

    Adapting to Regulation and Market Changes

    Changes in discharge rules and consumer expectations increase pressure on colorant suppliers. Requirements such as REACH, ZDHC, and other green chemistry initiatives place new tests on dyes that worked perfectly in legacy systems. We review every batch’s compliance profile in line with legal and environmental guidelines. We also maintain close relationships with outside labs equipped for trace contaminant scans, supporting EU and US apparel customers demanding a tight spec.

    Clients exporting finished goods want confidence their dye choices will not introduce unapproved substances. Acid Blue A’s raw materials and intermediates remain traceable. We share batch analyses up the supply chain, ensuring no surprise ingredients hidden in a finished fabric or notebook. Some projects call for custom documentation—usually supporting new certifications—and our staff accommodate these requests without delay.

    What Makes Acid Blue A Stand Out

    Few dyes manage the same blend of stability, depth, and application versatility. Acid Blue A historically outperforms lower-quality alternatives in setups ranging from microbatch sampling to large-scale continuous processing. Its sharp color cutoff, rapid strike rate, and minimal aftertreatment needs win praise across various sectors. Even mills running legacy equipment report reliable uptake and evenness, citing smoother transitions on changeovers between lots.

    Durability under repeated use matters in the real world. School uniforms, hotel linens, and standard workwear demand color that lasts—not just in a lab wash but through hundreds of real-life cycles. Feedback from bulk textile operations, especially those with rigorous QA regimes, confirms Acid Blue A’s strength after consecutive washing and sunlight exposure cases. This marks the difference between a specification met on a datasheet and color that stands up to daily life.

    Continuous Improvement from Within

    Feedback loops never stop. Operators, R&D staff, and logistics specialists all weigh in after every lot goes to market. We take failures as learning opportunities: a batch that failed to meet customer tonality led us to tweak not just the drying step but sourcing from a different aromatic base manufacturer. Achieving consistency above 99 percent does not just happen—it takes listening, trial runs, and even remapping intake water profiles after a minor source change shows up as background color shift.

    We encourage direct communication with users at every stage. Teams regularly visit mills and processing houses to view the full production pipeline, from stockroom storage to final inspection. Our goal remains the same: identify bottlenecks, remove them, and create value that does not show up on a price list. Sometimes these visits prompt new equipment investment or updated SOPs, but the ultimate reward is cleaner shade matches and less waste—the kind of real savings every operator notices.

    Supply Chain Reliability and Batch Security

    The supply chain landscape never sits still. Sourcing reliable intermediates, shipping on time, and keeping contingency stocks all impact whether customers get dye exactly when production demands it. We have navigated port slowdowns, raw material price spikes, and transport bottlenecks to keep Acid Blue A available with no extended backorders. Each element of our logistics chain is documented; temperature swings and packing strength both get routine reviews.

    Paperwork can’t guarantee performance; only careful packing and batch-traceable labeling do that. Our logistics team runs mock shipments and tracebacks, confirming that no batch gets lost in transit or sits too long in uncontrolled conditions. We never take supply continuity for granted—spot shortages in blue acid intermediates have tripped up even the largest mills. We have learned to buffer for demand spikes, drawing on both on-site stocks and consistent, vetted suppliers.

    Looking to the Future

    Down the line, application demands shift as consumer fashions change and process methods adapt. Waterless dyeing and closed-loop production challenge classical dyes to respond or risk getting left behind. Our in-house chemists test Acid Blue A in both traditional and experimental dyeing setups, exploring its limits on emerging fabric blends and process innovations. Whether used in classic dye baths or newly engineered spray methods, we expect this dye to meet future milestones.

    Clients appreciate more than shipment—ongoing support shapes their decisions. As blended fabrics and “circular” textiles push the limits of classic processing, we share practical lab findings with partners. The market does not wait for slow adapters. Innovators in technical fabrics need to know their colorant will not just “work”; it will improve overall production speed and customer satisfaction. Our duty as a manufacturer does not stop with today’s batch—it extends to next year’s process changes and the ongoing sharpening of quality benchmarks.

    Closing Thoughts

    Acid Blue A demonstrates how years of hands-on effort lead to more than just a colorant. It represents a bond between producer and industry, a product that evolves in lock-step with real-world needs and technical barriers. Every feedback call, every sample complaint, and every shade match trial forms part of a story guided by one goal: to deliver consistent, reliable dye to those who depend on it. In our view, this ongoing partnership with customers sets the foundation for growth on both sides of the equation, ensuring that Acid Blue A remains not just a chemical name but a mark of quality and trust in every meter it colors.