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High-Purity 4-Nitrophthalic Anhydride CAS 641-70-3 for Chemical Synthesis

4-Nitrophthalic Anhydride (CAS 641-70-3) is a premium nitro-substituted phthalic anhydride designed for advanced chemical synthesis. As a key intermediate,

Reference 344 Oct 2026 Specialty Chemicals

High-Purity 4-Nitrophthalic Anhydride CAS 641-70-3 for Chemical Synthesis

4-Nitrophthalic Anhydride (CAS 641-70-3) is a premium nitro-substituted phthalic anhydride designed for advanced chemical synthesis. As a key intermediate,

  • Evaluation sample supplied before a volume order
  • Certificate of analysis issued per batch
  • Technical data and safety information prepared up front
  • Batch reference recorded against every delivery

Specifications

Chemical Name
4-Nitrophthalic Anhydride
CAS Number
641-70-3
Purity
≥98% (GC)
Appearance
Light yellow to off-white crystalline powder
Melting Point
116-120 °C
Moisture Content
≤0.5%
Packaging
25 kg fiber drum with inner polyethylene bag, or as per customer request
MOQ
1 kg (sample order available)
Certification
ISO 9001:2015, COA provided
Shelf Life
2 years when stored properly
Storage
Store in a cool, dry, well-ventilated area away from moisture and heat

Product Details

4-Nitrophthalic Anhydride (CAS 641-70-3) is a premium nitro-substituted phthalic anhydride designed for advanced chemical synthesis. As a key intermediate, it enables the production of high-performance dyes, pharmaceuticals, and agrochemicals. Our product offers exceptional purity and consistency, ensuring reliable results in your most demanding applications.

Key Benefits

  • High Purity: Minimum 98% purity (GC) ensures minimal impurities and consistent reaction outcomes.
  • Versatile Intermediate: Ideal for synthesizing nitro-substituted phthalimides, dyes, and pharmaceutical compounds.
  • Reliable Supply: Manufactured under strict quality control with scalable production capacity.
  • Cost-Effective: Competitive pricing without compromising on quality, reducing your overall production costs.
  • Eco-Friendly: Produced with optimized processes that minimize waste and environmental impact.

Applications

  • Dye Industry: Used as a precursor for azo dyes and pigments with excellent color strength.
  • Pharmaceuticals: Key building block for active pharmaceutical ingredients (APIs) and intermediates.
  • Agrochemicals: Synthesis of herbicides, insecticides, and fungicides.
  • Polymer Additives: Modification of polymers to enhance thermal stability and performance.
  • Research & Development: Suitable for laboratory and pilot-scale synthesis.

Why Choose Our 4-Nitrophthalic Anhydride?

We understand the critical role of raw material quality in your production. Our 4-Nitrophthalic Anhydride is synthesized using advanced nitration and dehydration processes, ensuring high reactivity and low moisture content. Each batch is rigorously tested for purity, melting point, and impurity profile, and comes with a certificate of analysis (COA) for full traceability. With our global logistics network, we ensure timely delivery and secure packaging to maintain product integrity. Partner with us to elevate your chemical synthesis with a dependable, high-quality nitro-substituted phthalic anhydride.

Why buyers specify through us

Specification first The assay, the limits that matter to your process and the form come before the price; alternatives are offered with the differences written out.
Documents with the goods Technical data, the batch certificate of analysis and safety information are assembled per order, so the paperwork matches the lot delivered.
Packing matched to the line Barrel, IBC, bag or big bag and the net weight are confirmed with the order rather than left to the buyer to sort out.
Repeat supply The grade, origin and packing of an approved order are recorded so the next delivery matches the last one.
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