从India供应商批发进口Acid Yellow 42 — FOB条款

Acid Yellow 42, with CAS number 6375-55-9 and EINECS 228-940-9, is an acid dye of molecular formula C32 responder H24N8Na2O8S2, supplied by Sparrowings International as a powder from their Gujarat base. This weak acid yellow dye is formulated for multiple industrial applications including textile, leather, paper, paint and food dyestuffs, with particular suitability for polyamide fibre dyeing. The product carries the Sparrowings brand designation and originates from Ahmedabad, Gujarat, a region with established chemical manufacturing infrastructure. The molecular structure features disodium salt functionality with dual sulfonate groups, conferring solubility and substantivity for anionic dyeing processes on protein and polyamide substrates.

The C.I. Acid Yellow 42 specification typically encompasses a monoazo or disazo chromophore system with good level-dyeing characteristics and moderate wet fastness properties. Standard commercial material for polyamide applications typically shows exhaustion optima at pH 5.0 to 6.5, with compatibility in combination shades across the colour spectrum. The powder form requires dissolution at 60-80°C with good agitation prior to addition to the dye bath. Typical auxiliary chemicals for processing include ammonium acetate or acetic acid for pH control, and levelling agents to promote uniform dye uptake on substrates with varying physical maturity or chemical damage. The dye's weak acid classification indicates affinity for nylon under neutral to weakly acidic conditions without requiring strongly acidic dyebaths.

Primary buyers include textile commission dyers, carpet manufacturers, automotive leather finishers, specialty paper mills, and paint pigment formulators seeking bright yellow shades with good light fastness. Polyamide fibre applications span hosiery, sportswear, upholstery fabrics and industrial yarns where level, reproducible shades are required. Food dyestuff applications, where claimed, require verification of regulatory compliance for intended market jurisdictions. The multi-sector usage pattern suggests batch-to-batch consistency is critical across diverse end-use specifications. Buyers should confirm with Sparrowings International the exact purity, subsidiary dye content, heavy metal limits, and application-specific fastness data relevant to their intended use.

Sparrowings International is located at D-101, Maruti Homes, Opp. Shreenath Elegance, Nana Chiloda, Ahmedabad 382330, Gujarat, India. The company holds a harbor trust tier classification on the marketplace, with a response rate of 0.00% and zero recorded average response hours, suggesting limited or unmonitored platform engagement. The supplier self-identifies under the Sparrowings brand, offering Acid Yellow 42 for multiple industrial segments. The listing provides CAS, EINECS and molecular formula data, indicating some technical documentation exists, though manufacturing scale, facility accreditation, and operational history are not disclosed.

The Ahmedabad location positions the supplier within Gujarat's chemical manufacturing corridor, with access to Mundra or Hazira ports for export shipments. However, the profile contains no verified export experience, quality management certifications, or client references. Buyers should independently verify business registration, GST compliance, and operational status through direct due diligence. The multi-application claims (including food dyestuffs) require particular scrutiny, as regulatory compliance for food contact or food additive use varies dramatically by destination country and demands specific certification not mentioned in the available data.