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Metanilic acid

Metanilic acid CAS 121-47-1 C6H7NO3S; off-white powder; Stable. Combustible. Incompatible with strong oxidizing agents, acids.
  • aozun

  • off-white powder;

  • 121-47-1

  • C6H7NO3S

  • 173

  • 204-473-6

  • slightly soluble

Availability:

Product Description

Metanilic Acid CAS 121-47-1: Versatile Intermediate for Dyes and Pharmaceuticals


Discover Metanilic Acid CAS 121-47-1, a high-purity white powder essential for organic synthesis. As 3-aminobenzenesulfonic acid, it enables efficient diazotization and coupling reactions. Ideal for azo dyes, pharmaceuticals, and biosensors, this compound ensures reliable performance in demanding applications.


Product Overview


Metanilic Acid, with its meta-substituted amino and sulfonic groups, excels in water-soluble dye production and intermediate synthesis. It offers superior stability and reactivity under various conditions. Our product meets rigorous analytical standards for consistent quality.


Key Chemical Properties



Property Value/Description
CAS Number 121-47-1
Molecular Formula C₆H₇NO₃S
Molecular Weight 173.19 g/mol
Appearance White to grayish-beige powder
Purity ≥98.0% (HPLC)
Melting Point >300°C (decomposes)
Density 1.69 g/cm³
Solubility Slightly soluble in water; very slightly in ethanol
pKa 3.74 (at 25°C)
Stability Stable; combustible when heated


These properties position Metanilic Acid CAS 121-47-1 as a top choice for precise chemical transformations.


Applications of Metanilic Acid CAS 121-47-1


This compound drives innovation across industries:


  • Dye Manufacturing: Key precursor for water-soluble azo dyes in textiles and inks.


  • Pharmaceutical Synthesis: Builds intermediates for anti-inflammatory drugs and sulfonamides.


  • Biosensor Development: Enhances conductivity in glucose sensors and polyaniline-based materials.


  • Analytical Chemistry: Used in diazo coupling for protein detection and colorimetric assays.


  • Polymer Additives: Improves solubility in sulfonated polymers for coatings and films.


It supports eco-friendly processes with high yield potential.


Benefits of Choosing Our Metanilic Acid


  • Exceptional Purity: Minimizes side reactions for cleaner end-products.


  • Reactivity Control: Meta positioning allows selective functionalizations.


  • Thermal Stability: Handles high-temperature syntheses without degradation.


  • Sustainability: Low toxicity aids green chemistry compliance.


  • Scalable Supply: Bulk options ensure cost-effective procurement.




Frequently Asked Questions (FAQs)


What is Metanilic Acid CAS 121-47-1?


Metanilic Acid is 3-aminobenzenesulfonic acid, a sulfonic acid used in dye and drug synthesis.


What are the primary applications of Metanilic Acid?


It serves in azo dye production, pharmaceutical intermediates, and biosensor fabrication.


Is Metanilic Acid soluble in water?


It has slight solubility in water (less than 1 mg/mL at 22°C), ideal for aqueous reactions.


What purity level is available for your Metanilic Acid?


Our product offers ≥98% purity by HPLC, suitable for lab and industrial use.


How should Metanilic Acid be stored?


Store in a cool, dry place in airtight containers to maintain stability and prevent moisture absorption.


What packaging options exist?


Available in 25 kg drums, 1 MT bags, or custom sizes for flexible ordering.


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