从India供应商批发进口Acid Orange 33 — FOB条款

Acid Orange 33 is a weak acid dye supplied by Sparrowings International from Ahmedabad, Gujarat, with CAS number 6507-77-3 and molecular formula C34H28N4Na2O8S2. The product is also known as Weak Acid Orange 2R, indicating its positioning in the weaker acid dye sub-class with higher molecular weight and improved wet fastness compared to levelling acid dyes. It appears as a powder form suitable for industrial application on leather, paper, textile and polyamide substrates. The Gujarat origin places production within India's concentrated chemical manufacturing corridor, with access to raw material supply chains for azo dye intermediates. The colour index should be confirmed with the supplier, as Acid Orange 33 may correspond to C.I. 24710 or a related designation.

Weak acid dyes of this chemistry typically feature larger molecular structures with enhanced substantivity through hydrogen bonding and van der Waals forces, in addition to ionic attraction. The disodium salt form (Na2 in the formula) indicates two sulfonate groups, conferring good water solubility and moderate affinity. Standard commercial specifications for this dye class include 80% minimum strength, pH stability between 4 and 7, and compatibility with afterchrome or metal-complex procedures in some variants. The powder form requires controlled humidity storage below 60% relative humidity to prevent agglomeration. Typical application methods include exhaust dyeing at 95-100°C and padding for continuous processing on woven polyamide fabrics.

Buyers in the leather sector use this dye class for aniline and semi-aniline finishes where penetration and levelness are critical. Paper colouring operations require high purity with low insoluble content to prevent specking on high-speed coating machines. Textile applications focus on polyamide hosiery, swimwear and activewear where wet fastness to perspiration and sea water is essential. The polyamide segment particularly values weak acid dyes for their ability to cover barre in textured yarns. Trade terms, packaging sizes, MOQ and lead time from Sparrowings International are not specified in the source data and must be confirmed directly. Sample requests and trial dyeings are advisable before volume commitment.

Sparrowings International is located at D-101, Maruti Homes, opposite Shreenath Elegance, Nana Chiloda, Ahmedabad 382330, Gujarat. The business holds a harbor trust tier on the platform. Its response metrics show 0.00% response rate with zero average response hours, indicating minimal tracked engagement through the platform messaging system. The supplier operates under its own Sparrowings brand for this dye product. No manufacturing facility description, year of establishment, employee count, revenue, or client references are provided in the source profile.

The Ahmedabad location situates the company within Gujarat's chemical industry cluster, with proximity to dye intermediate manufacturers and Ankleshwar-Bharuch chemical belt. Buyers should independently verify whether Sparrowings International is a manufacturer, exporter, or trading intermediary, as this affects technical support capability and batch consistency. No quality certifications, environmental compliance documentation, or export licence details are stated. Direct due diligence is recommended, including reference checks and factory audit if manufacturing is claimed. The supplier's product range appears focused on acid dyes for multiple industrial sectors.