从India供应商批发进口Acid Brown 354 Dyes — FOB条款

Acid Brown 354 is a synthetic acid dye with the chemical formula C30H20N8Na2O12S2, registered under CAS number 71799-43-4 and EINECS number 276-027-9. Sparrowings International supplies this dye from Gujarat, India, where the chemical processing cluster benefits from established raw material supply chains for azo and anthraquinone intermediates. The product appears as a powder, the standard physical form for acid dyes intended for industrial dissolution and application. This listing targets leather and wool dyeing operations specifically, indicating formulation suitability for protein-based fibre substrates rather than cellulosic materials.

The dye's chemical structure incorporates two sulfonic acid sodium salt groups, rendering it water-soluble and anionic, which is characteristic of acid dyes. These sulfonate groups facilitate bonding with protonated amino groups in wool keratin and leather collagen under acidic pH conditions. The chromophore system likely combines azo and anthraquinone moieties to achieve the brown shade with adequate lightfastness and washfastness properties. Acid Brown 354 typically requires formic or acetic acid in the dyebath to achieve optimal exhaustion and levelness on wool and chrome-tanned leather. Standard commercial grades contain active dyestuff content ranging from 80% to 85% by mass, with inert diluents and dispersing agents comprising the balance.

Tanneries and wool textile mills represent the primary buyers, with particular relevance to automotive upholstery leather, garment leather, and fine wool carpets. The dye's powder form permits flexible dosing through automated weighing systems or manual batch preparation. Buyers should confirm the supplier's batch-to-batch shade consistency data, as acid dyes exhibit sensitivity to synthesis conditions and standardisation practices. Import considerations from India include obtaining a certificate of analysis for each lot, verifying heavy metal compliance (particularly chromium, lead, and arsenic limits under REACH or comparable regulations), and clarifying whether Sparrowings International provides technical support for recipe development. The Gujarat origin suggests potential for competitive pricing against European dyestuff houses, though this must be weighed against logistics costs and import duty structures.

Sparrowings International operates from D-101, Maruti Homes, opposite Shreenath Elegance, in Nana Chiloda, Ahmedabad, Gujarat, postal code 382330. The company's trust tier is classified as 'harbor', indicating a baseline verification status on the platform without premium or verified supplier designation. Notably, the response rate stands at 0.00% with zero average response hours recorded, suggesting either a newly registered account, inactive listing management, or data collection issues that prospective buyers must factor into communication planning.

The supplier's address places it within Ahmedabad's industrial periphery, a region with established chemical and textile auxiliary manufacturing. However, no factory ownership, production capacity, year of establishment, employee count, or export experience is provided in the available profile. The brand name 'Sparrowings' appears to be the supplier's own, rather than a third-party distribution arrangement. Buyers should independently verify whether Sparrowings International manufactures Acid Brown 354 in-house or operates as a trading intermediary, as this affects technical support capability, batch consistency guarantees, and supply chain resilience. The absence of stated certifications (ISO, GOTS, ZDHC, or Bluesign compliance) means buyers must explicitly request documentation for restricted substance compliance if supplying EU or North American end-markets.