从India供应商批发进口Acid Red 357 Dyes — FOB条款

Acid Red 357 Dyes from Sparrowings International is a powder-form acid dye identified by CAS number 61951-36-8 and molecular formula C16H12N5NaO7S, manufactured in Gujarat, India. The product carries the alternative name Acid Scarlet ML and is positioned for leather and textile dyeing applications where strong red shades with good affinity for protein and polyamide substrates are required. Sparrowings International brands this material under its own name, suggesting either in-house synthesis or controlled sourcing from local dye manufacturing capacity in Gujarat, a state with substantial dye intermediate and finished dye production infrastructure. The powder form allows straightforward weighing, dissolution, and incorporation into aqueous dyeing processes.

The chemical structure of Acid Red 357 features a monoazo chromophore with sodium sulfonate groups that confer water solubility and substantivity for cationic sites on wool, silk, and nylon under acidic conditions. Standard commercial material of this type typically shows 80-85% minimum dye content, with the balance comprising sodium chloride, sodium sulfate, or moisture from the salting-out production step. For leather dyers, the molecular size and sulfonation pattern promote penetration into the collagen structure without excessive surface staining, provided the pH and temperature profile is controlled. Textile applications on wool normally employ formic or acetic acid to reach pH 4.0-5.5, with gradual heating to 90-95°C to achieve level exhaustion and minimise fibre damage.

Sparrowings International targets leather goods manufacturers, textile dye houses, and traders serving apparel and home furnishing markets. The dye's compatibility with both drum dyeing for leather and exhaust dyeing for fabrics offers flexibility across production scales. Buyers should note that the listing provides no minimum order quantity, price, lead time, or specific packaging details, so these must be negotiated directly. Gujarat's chemical manufacturing cluster, particularly around Ahmedabad and Vadodara, supports competitive sourcing, but due diligence on the supplier's quality systems and batch consistency is essential before committing to volume orders.

Sparrowings International is located at D-101, Maruti Homes, Opposite Shreenath Elegance, Nana Chiloda, Ahmedabad 382330, Gujarat, India. The supplier holds a harbour trust tier with a zero percent response rate and no recorded average response hours, which signals that prospective buyers should initiate contact early and through multiple channels to gauge responsiveness. The company name and branding (sparrowings) appear on the product, though the listing does not clarify whether this denotes manufacturing ownership or trading operations. No information on year of establishment, workforce, production capacity, or facility certifications is provided in the source data.

Ahmedabad's Nana Chiloda area situates Sparrowings International within Gujarat's dense chemical and textile auxiliary network, with access to dye intermediate suppliers and logistics corridors serving Mumbai and Mundra ports. The supplier's focus on Acid Red 357 for leather and textile markets suggests technical familiarity with these application sectors. Buyers should request details of the company's quality management system, batch testing protocols, and whether they operate an in-house laboratory for shade matching and fastness testing. Direct verification of manufacturing versus trading status will inform risk assessment and negotiation strategy.