Import 3-Nitro Phthalic Acid — Buy in Bulk from Supplier in China

3-nitro phthalic acid is a nitro-substituted aromatic dicarboxylic acid with molecular formula C8H5NO6, derived from phthalic acid by nitration at the meta position relative to one carboxyl group. This organic compound presents as a crystalline solid and functions as a critical intermediate in dye, pigment, and resin synthesis. The supplier states purity typically exceeding 99%, which supports consistent batch performance in downstream manufacturing. The material's bifunctional character, combining carboxylic acid groups with an electron-withdrawing nitro substituent, makes it reactive toward nucleophiles and useful in condensation polymerisation pathways.

The compound is typically produced by controlled nitration of phthalic anhydride or phthalic acid followed by hydrolysis, with industrial grades requiring careful control of positional isomers. Standard specifications for colour intermediate applications typically address nitro content, acid value, and insoluble matter. The 99% purity claim exceeds typical technical grade thresholds, though buyers should confirm whether this represents area percentage by HPLC, titrimetric assay, or another methodology. Moisture specification, residual sulfuric acid from nitration, and heavy metal limits are not stated and should be requested for sensitive applications. Typical packaging for this solid intermediate includes fibre drums or multi-wall bags with polyethylene liner, though the supplier does not specify container details in the available data.

Primary consumption occurs in plastics additives, textile dye intermediates, and pharmaceutical synthesis where the nitro group serves as a masked amine or directs further substitution. Manufacturers of phthalocyanine pigments, alkyd resins, and polyimide precursors represent established buyer segments. The supplier mentions flexible minimum order quantities without stating values, and references ISO and SGS certifications that buyers should verify directly. Available trade terms include FOB and CIF, with payment options of L/C and T/T, though current availability and precise conditions require confirmation with Beijing Tsingrun Science & Technology Co.Ltd.

Beijing Tsingrun Science & Technology Co.Ltd operates from Tsinghua Science Park, Beijing 100084, China, placing it within the Zhongguancun high-technology corridor. The supplier holds an imported tier designation alongside a harbor trust badge, indicating a profile with some external data integration but limited platform-native verification depth. Response metrics show 0.00% response rate and zero average response hours, which indicates either nascent platform activity or incomplete data synchronisation. Buyers should not rely on platform-mediated communication alone and should establish direct channels promptly.

The company's location in a premier science park suggests potential proximity to academic research institutions, though the listing does not disclose R&D capabilities, manufacturing assets, or whether operations are trading-focused or production-oriented. No employee count, annual revenue, year of establishment, or client references appear in the available profile. The mention of ISO and SGS certifications lacks certificate numbers, scope, or expiry dates. Buyers requiring supplier qualification dossiers for pharmaceutical or food-contact applications should request full documentation including quality agreements, audit history, and regulatory compliance statements directly from Beijing Tsingrun Science & Technology Co.Ltd.