Import Acid Brown 365 - Brown M2rl — Buy in Bulk from Supplier in India

Acid Brown 365, also known by the commercial designation Brown M2RL, is a metal complex dye belonging to professional acid dye classes used for protein and polyamide fibre substrates. This listing from Karsandas Mavji in Mumbai, India, presents the dye for industrial textile operations requiring consistent shade development on wool, nylon, and silk. The supplier notes formulation with acids and compounds sourced from certified vendors, though specific purity percentages and CAS registry data are not stated in the source material. The dye is offered in multiple packaging configurations to suit varying production scales, with exact pack sizes and minimum order quantities requiring direct supplier confirmation.

Acid Brown 365 operates within the 1:2 metal complex dye category, where a single metal ion (typically chromium or cobalt) coordinates with two dye molecules to produce heightened lightfastness and washfastness compared to conventional acid dyes. The M2RL designation indicates a reddish-blue shade index, with the brown hue achieved through azo and anthraquinone chromophore combinations typical of this dye class. Standard commercial grades typically exhibit solubility in water at 80 degrees Celsius, with pH application ranges between 4.5 and 6.5 for wool and 5.5 to 7.0 for nylon 6,6 substrates. The dye's molecular structure incorporates sulfonic acid groups that enable anionic interaction with cationic sites on protein fibres, with typical exhaustion rates of 85% to 95% under controlled bath conditions. Standard auxiliary chemicals include formic acid, acetic acid, and ammonium sulfate for pH modulation, with levelling agents such as ethoxylated Witness compounds recommended for levelness on tightly constructed wool yarns.

Primary application sectors include wool carpet manufacturing, worsted suiting, nylon hosiery, silk screen printing, and specialty paper and leather finishing operations. The dye finds particular utility in automotive textile applications where lightfastness ratings of 5-6 on the ISO 105-B02 scale are typically required, with metal complex structures offering superior performance over premetalised alternatives. Inkjet formulation manufacturers also utilise Acid Brown 365 for its salt tolerance and aqueous stability in continuous feed systems. Buyers should confirm with Karsandas Mavji the specific lightfastness ratings, salt resistance properties, and compatibility with their substrate finishing chemistries. Trade terms including available Incoterms, standard lead times from Mumbai port, and accepted payment instruments require direct negotiation, as these operational details are not specified in the listing source.

Karsandas Mavji operates from 203 Rangwala Apts on M.G. Road in Ghatkopar West, Mumbai 400086, Maharashtra, India. The supplier holds a harbor trust tier classification within the marketplace system. The response rate displayed is 0.00 with zero average response hours recorded, indicating no response history is currently tracked for this entity. The supplier's self-description positions them among prominent acid metal complex dye manufacturers in India, with formulation operations using acids and compounds from certified vendors. The listing does not specify factory location, production capacity, number of employees, annual revenue, export markets served, or specific quality management system certifications such as ISO 9001 or ISO 14001.

The supplier profile provides limited operational transparency beyond the Mumbai office address and product claims. No information is given regarding years in business, ownership structure, manufacturing plant details, or research and development capabilities. The listing states availability of different packaging options without quantifying pack sizes, bulk configurations, or custom labelling services. Buyers should independently verify manufacturing credentials, request samples for laboratory testing against their substrate specifications, and confirm the supplier's ability to provide batch consistency data, dyeing profiles, and technical service support. The absence of response history suggests initiating contact through multiple channels to assess communication reliability before committing to volume orders.