Acid Blue 9

Oswal Udhyog supplies Acid Blue 9, identified by the Colour Index number C.I. 42090 and CAS Registry Number 3844-45-9, from their office in Mumbai's Andheri West industrial corridor. The material is characterised by excellent water solubility and compatibility with silk, wool, and selected synthetic fibres, positioning it within the standard triphenylmethane acid dye class. The supplier's Mumbai location provides access to Jawaharlal Nehru Port Trust (JNPT), India's largest container port, for export logistics. The harbour trust tier and imported supplier classification indicate a baseline marketplace presence rather than an advanced verification level, and the zero response metrics suggest buyers should establish direct communication protocols early in the engagement.

The C.I. 42090 designation confirms this is the disodium salt of 4-[(4-(N-ethyl-N-sulfobenzylamino)phenyl)-(4-sulfoniumbenzyl)amino]diphenylmethylidene]cyclohexa-2,5-dien-1-ylidene] (N-ethyl-N-sulfobenzyl)benzenemethanaminium, or more practically the standard commercial form of Acid Blue 9. The stated high lightfastness and wash fastness are characteristic of this chromophore when applied to appropriate substrates under controlled conditions, though specific rating numbers are not provided. The CAS number 3844-45-9 enables traceability through chemical databases and regulatory inventories, including EPA TSCA and REACH substance registrations. Typical commercial material contains the active dyestuff at a specified strength, with standard additives such as diluents or dispersants to ensure process stability.

Application sectors span textile dyeing for apparel and home furnishings, with potential use in food contact applications and cosmetics where regulatory approvals permit. The compatibility with synthetic fibres noted in the source requires clarification, as Acid Blue 9's primary affinity is for protein and polyamide substrates rather than polyester or acrylic. Buyers working with blended fabrics should request substantiation of fastness performance on their specific fibre combination. Trade considerations include confirming whether Oswal Udhyog operates as a manufacturer, trader, or agent, understanding their quality control documentation, and verifying any stated ISO or SGS certifications directly with the issuing bodies rather than relying on listing claims.

Oswal Udhyog is headquartered at C-211-213 Morya House, Off New Link Road, in Mumbai's 400053 postal district within the Maharashtra state. The address places the entity in a commercial office building rather than a manufacturing campus, which is common for trading houses and export-oriented intermediaries in India's dye and chemical sector. The imported supplier tier and harbor trust classification represent entry-level marketplace engagement, and the complete absence of response metrics, zero percent response rate and zero average response hours, signals that buyers should not assume prompt communication and should validate contact effectiveness before depending on this channel for time-sensitive procurement.

The source description references ISO and SGS certifications, though no certificate numbers, scopes, or dates are provided, and these claims cannot be independently verified from the available data. Mumbai's concentration of chemical traders means due diligence should extend to understanding Oswal Udhyog's position in the supply chain, whether they hold inventory, source from domestic manufacturers, or operate on indent basis. The lack of disclosed manufacturing location, production capacity, or quality management system details means buyers must request and verify this information directly, including factory audit reports or third-party assessments, before committing to volume supply agreements.