从India供应商批发进口Acid Violet 43 — FOB条款

Acid Violet 43, CAS number 4430-18-6, is an acid dye with the molecular formula C21H14NNaO6S and molecular weight of 431.39 g/mol, supplied by Sparrowings International from Gujarat, India. The dye features an azo or anthraquinone-based chromophore system, typical of acid dyes designed for protein and polyamide fibre substrates, with sulphonate modal groups conferring water solubility and affinity for positively charged sites on wool and nylon. EINECS registration 224-618-7 confirms its status within EU chemical inventory requirements. The powder form specified by Sparrowings International is the standard physical presentation for acid dye shipments, facilitating accurate weighing and dissolution in textile dyehouses.

The colour index constitution number for Acid Violet 43 places it within the acid violet subclass characterised by good light fastness on wool (typically rating therein 4-5 on the ISO 105-B02 scale) and moderate wet fastness properties that improve with after-treatment using syntan or metal-complex fixing agents. The dye's absorption maximum in aqueous solution typically falls between 540 and 560 nanometres, yielding a reddish violet shade that shifts with pH and substrate. Standard commercial strength is expressed as a percentage of the dry pure dye content, with typical offerings at 150 percent or 200 percent strength relative to the standardised colour index reference. Gujarat's chemical manufacturing cluster, where Sparrowings International operates, accounts for a substantial share of India's synthetic dye production, with established supply chains for dye intermediates and formulated colour products.

Sparrowings International markets this dye for food, leather, paper, and textile applications, though the suitability for each end-use depends on regulatory compliance specific to that sector, food contact applications in particular require certifications not detailed in the available listing. Textile dyehouses processing wool carpets, nylon hosiery, and silk fabrics represent the primary industrial consumers, with leather tanneries employing acid dyes for aniline and semi-aniline finishes. Paper colourists use acid violet shades for specialty packaging and decorative grades. Importers should confirm with Sparrowings International which application grades are stocked, whether technical data sheets with recommended dyeing profiles are available, and whether the supplier offers matching service for shade development. The Ahmedabad location provides access to Gujarat's dye chemical infrastructure and port connectivity through Mundra or Kandla for export shipments.

Sparrowings International maintains a registered address at D-101, Maruti Homes, Opposite Shreenath Elegance, Nana Chiloda, Ahmedabad 382330, Gujarat, India. The supplier holds harbor-tier status with a recorded response rate of 0.00 percent and no average response time data, indicating limited or no historical engagement through the platform channel. The company name "Sparrowings" appears as a brand designation on the product, though whether this represents manufacturing or trading activity is not specified in available records. The Ahmedabad location places the entity within Gujarat's dense chemical and dye intermediate manufacturing belt, with access to local suppliers of H-acid, J-acid, and other coupling components essential to azo dye synthesis.

No information is provided regarding year of establishment, production capacity, number of employees, annual turnover, export destinations, or quality management certifications. The listing does not indicate factory ownership, R&D capability, or laboratory facilities for colour matching and quality control. Buyers must independently verify whether Sparrowings International operates as a manufacturer, commissioned processor, or pure trading entity, as this distinction affects technical support availability, batch consistency, and recourse in quality disputes. The supplier's physical address in a residential-commercial mixed zone rather than an industrial estate may suggest trading rather than manufacturing operations, though this requires direct confirmation.