从India供应商批量进口Acid Red 357

Acid Red 357 is an acid dye with CAS number 61951-36-8, supplied by Krishna Impex from Maharashtra, India. The product presents as a vibrant red powder with strong color strength and water solubility that allows straightforward incorporation into aqueous dyeing systems. Its molecular composition (C16H12N5NaO7S) places it within the azo dye class, specifically engineered for substrates that carry positive charge sites under acidic conditions. The dye exhibits notable lightfastness, meaning dyed articles resist fading on prolonged exposure to sunlight or artificial UV sources. Krishna Impex lists this material for industrial buyers in textiles, coatings, and plastics sectors where color stability and batch consistency matter.

The standard manufacturing route for Acid Red 357 involves diazotisation and coupling reactions typical of monoazo acid dyes, followed by salting out, filtration, and drying to a defined powder specification. Typical commercial lots show moisture content between 3% and 5% and a pH of 6.0-7.5 in 1% solution at 25°C. The dye's affinity for protein fibres (wool, silk) and polyamide substrates stems from its sulfonic acid groups, which form ionic bonds with protonated amino sites. In leather applications, it penetrates the collagen matrix evenly, producing level shades without mottling. For textile dyers, standard bath pH ranges from 4.5 to 5.5 using acetic or formic acid, with typical exhaustion temperatures of 95-100°C for wool and 98-105°C for nylon 6,6.

Primary buyers include wool carpet manufacturers, nylon hosiery dyers, leather tanneries, and specialty coatings formulators. The product suits batch, semi-continuous, and continuous dyeing methods, though the specific method depends on substrate and equipment. Krishna Impex offers Acid Red 357 with flexible minimum order quantities and shipment terms including FOB and CIF. Payment options cover letter of credit and telegraphic transfer. Buyers should confirm exact lot parameters, certificate of analysis details, and current lead times directly with the supplier before placing orders.

Krishna Impex operates from B-10, Om Sai Industrial Estate, Bhayander East, Phatak Road, Thane 401105, Maharashtra, India. The supplier's trust tier is listed as harbour, with a response rate of 0.00% and no recorded average response hours, which indicates that direct communication before committing to orders is advisable. The supplier profile does not disclose manufacturing ownership details, so buyers should clarify whether Krishna Impex is the producer or a trader/distributor of Acid Red 357. No verified certifications, year of establishment, stated workforce size, or annual turnover figures appear in the available data.

The listing positions Acid Red 357 for export-oriented industrial dye buyers seeking supply from Indian chemical manufacturing hubs. Maharashtra hosts significant dye intermediate and finished dye production capacity, though proximity to raw material sources in Gujarat is also relevant. Buyers should request a current certificate of analysis, safety data sheet, and details of quality control procedures from Krishna Impex directly. Given the zero response rate recorded, initiating contact well ahead of planned purchase dates is prudent to assess communication reliability and negotiate specific trade terms.