Description

5-Methyl-2-Naphthalenesulfonic Acid is a specialized organic sulfonic acid derivative that serves as a critical intermediate in advanced chemical synthesis. Its value lies in its unique aromatic sulfonic acid structure, which is essential for introducing sulfonate groups to modify solubility, reactivity, and binding properties in target molecules. This high-purity intermediate is primarily needed by manufacturers in the pharmaceutical, agrochemical, and specialty dye industries for the development of active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of novel active pharmaceutical ingredients (APIs), particularly for non-steroidal anti-inflammatory drugs (NSAIDs) and other therapeutic agents.
• Agrochemical Synthesis: Used in the production of advanced herbicides, fungicides, and plant growth regulators where the naphthalene sulfonate moiety is required for efficacy.
• Dye and Pigment Manufacturing: Acts as a precursor and coupling agent in the synthesis of azo dyes, acid dyes, and other high-performance colorants.
• Chemical Research & Development: Employed in organic synthesis laboratories for method development and as a standard reagent in sulfonation and derivatization studies.
• Polymer Modification: Utilized to introduce sulfonic acid groups into polymer chains, enhancing properties like hydrophilicity and ion-exchange capacity.
• Catalyst and Ligand Preparation: Serves as a starting material for creating specialized sulfonated ligands and organocatalysts used in fine chemical catalysis.

Basic Information

Product Name	5-Methyl-2-Naphthalenesulfonic Acid
CAS No.	816447-00-4
Molecular Formula	C₁₁H₁₀O₃S
Molecular Weight	222.26 g/mol
Synonyms	2-Naphthalenesulfonic acid, 5-methyl-; 5-Methylnaphthalene-2-sulfonic acid; 5-Methyl-2-naphthalenesulphonic acid; 2-Sulfo-5-methylnaphthalene; 5-Methyl-β-naphthalenesulfonic acid; NSC 406903; 1,6-Dimethylnaphthalene-7-sulfonic acid (related isomer)
EINECS	Contact for details

Quality Control

Our 5-Methyl-2-Naphthalenesulfonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation via IR and NMR spectroscopy, to ensure it meets exacting standards for use in sensitive synthetic applications. A Certificate of Analysis (COA) detailing all specification results is provided with every shipment and is available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from strong bases, oxidizing agents, and sources of ignition. For long-term storage, consider under an inert atmosphere to maintain optimal purity.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%, Total impurities ≤ 1.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.