• 1. Can solvated intermediates inform us about nucleation pathways? The case of β-pABA
  A. J. Cruz-Cabeza,E. Taylor,I. J. Sugden,D. H. Bowskill,S. E. Wright,H. Abdullahi,D. Tulegenov,G. Sadiq,R. J. Davey CrystEngComm 2020 22 7447

Comprehensive Analysis of 4-Amino-2-methylbenzoic acid (CAS No. 2486-75-1): Properties, Applications, and Industry Trends

4-Amino-2-methylbenzoic acid (CAS No. 2486-75-1) is a versatile organic compound widely utilized in pharmaceutical synthesis, agrochemical formulations, and specialty chemical research. This white to off-white crystalline powder, with a molecular formula of C₈H₉NO₂, has garnered significant attention due to its role as a key intermediate in the production of dyes, UV absorbers, and bioactive molecules. The compound's unique structural features – including an amino group at the para position and a methyl substituent ortho to the carboxylic acid – contribute to its diverse reactivity patterns.

Recent advancements in green chemistry have driven innovation in the synthesis of 4-Amino-2-methylbenzoic acid derivatives, with researchers exploring catalytic methods to improve yield and reduce environmental impact. The compound's thermal stability (decomposition point >200°C) and moderate solubility in polar solvents make it particularly valuable for high-performance material applications. Analytical techniques such as HPLC (typically showing >98% purity in commercial grades) and NMR spectroscopy are routinely employed for quality control in industrial settings.

The global market for benzoic acid derivatives is projected to grow at 5.2% CAGR through 2030, with 4-Amino-2-methylbenzoic acid playing a crucial role in this expansion. Pharmaceutical applications account for approximately 42% of demand, particularly in the synthesis of non-steroidal anti-inflammatory drug (NSAID) precursors. Emerging research suggests potential applications in organic electronic materials, where its electron-donating amino group may enhance charge transport properties in molecular semiconductors.

Manufacturers have developed improved purification protocols to meet stringent regulatory requirements, especially for pharmaceutical-grade 4-Amino-2-methylbenzoic acid. The compound typically exhibits excellent batch-to-batch consistency when produced under current Good Manufacturing Practices (cGMP). Storage recommendations include protection from light in tightly sealed containers at ambient temperature, with shelf lives exceeding 24 months when properly handled.

From a synthetic chemistry perspective, the ortho-methyl substitution in 4-Amino-2-methylbenzoic acid introduces interesting steric effects that influence its reactivity. This feature has been exploited in the design of chiral auxiliaries and asymmetric catalysts. The compound's dual functionality (amine and carboxyl groups) allows for selective derivatization, making it a valuable building block in combinatorial chemistry and drug discovery platforms.

Environmental and safety assessments indicate that 4-Amino-2-methylbenzoic acid (CAS 2486-75-1) demonstrates favorable ecological profiles compared to many aromatic amines. Modern production facilities employ closed-system processing and advanced wastewater treatment to minimize environmental discharge. Occupational exposure limits are typically set at 5 mg/m³ (8-hour TWA), with standard personal protective equipment including nitrile gloves and dust masks recommended for handling.

Cutting-edge research explores the compound's potential in metal-organic frameworks (MOFs), where its rigid aromatic structure and coordination sites may contribute to novel porous materials for gas storage applications. Additionally, studies investigating 4-Amino-2-methylbenzoic acid Schiff bases have shown promise in developing new corrosion inhibitors for industrial applications.

The analytical characterization of 4-Amino-2-methylbenzoic acid typically reveals distinctive spectral features: IR spectroscopy shows strong absorptions at ~1680 cm^-1 (C=O stretch) and 3400-3200 cm^-1 (N-H stretch), while ¹H NMR displays characteristic aromatic proton patterns between 6.5-8.0 ppm. These properties facilitate quality verification and support the compound's identification in complex mixtures.

Emerging applications in cosmetic science are being investigated, particularly regarding the compound's potential as a UV-stabilizing agent in sunscreen formulations. Its structural similarity to PABA (para-aminobenzoic acid) – while offering improved stability – has prompted several patent filings in personal care chemistry. However, comprehensive safety evaluations are ongoing to establish appropriate use concentrations.

Supply chain dynamics for 4-Amino-2-methylbenzoic acid reflect broader trends in fine chemicals distribution, with just-in-time inventory models becoming prevalent among end-users. Major producers have implemented blockchain-based tracking systems to ensure material provenance and quality documentation throughout the supply network. Current pricing trends show moderate volatility tied to precursor availability and regional production capacity.

Academic interest continues to grow, with over 120 peer-reviewed publications referencing CAS 2486-75-1 in the past five years. Research hotspots include its use in multicomponent reactions and as a template for heterocyclic compound synthesis. The compound's balanced lipophilicity (calculated logP ~1.2) makes it particularly interesting for medicinal chemistry applications requiring optimal bioavailability.

• 37141-01-8(5-Aminobenzene-1,2,3-tricarboxylic acid)
• 88744-63-2(Benzenemethanol, 2,4,6-trimethyl-, 4-aminobenzoate)
• 2840-04-2(5-Amino-2-methylbenzoic acid)
• 219297-24-2(3,5-Diamino-2,6-dimethylbenzoic acid)
• 16752-16-2(4-Amino-2,6-dimethylbenzoic acid)
• 54229-32-2( )
• 854644-75-0(5-amino-2-(hydroxymethyl)benzoic acid)
• 52130-17-3(3-Amino-2-methylbenzoic acid)
• 5434-21-9(4-Aminophthalic acid)
• 5628-44-4(4-Amino-2,3-dimethylbenzoic acid)