Description

7-Methylnaphthalene-1-Sulfonic Acid is a specialized organic sulfonic acid derivative, serving as a key intermediate in fine chemical synthesis. Its value lies in its strong acidic character and naphthalene-based structure, which makes it a versatile building block for creating more complex molecules. This compound is essential for manufacturers and R&D laboratories in the pharmaceutical, agrochemical, and dye industries seeking to develop new active ingredients or functional materials.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a naphthalene sulfonate moiety.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents where its sulfonic acid group facilitates further chemical modifications.
• Dye and Pigment Manufacturing: Acts as an intermediate for synthesizing acid dyes, reactive dyes, and organic pigments, contributing to color fastness and solubility.
• Chemical Research & Development: Serves as a model compound or starting material in organic chemistry research for studying sulfonation reactions and aromatic substitution patterns.
• Surfactant and Detergent Precursor: Can be utilized to develop specialized surfactants and emulsifiers for industrial cleaning formulations.
• Polymer Additive Synthesis: Employed in creating monomers or functional additives that impart specific properties like solubility or ionic character to polymers.

Basic Information

Product Name	7-Methylnaphthalene-1-Sulfonic Acid
CAS No.	91344-81-9
Molecular Formula	C₁₁H₁₀O₃S
Molecular Weight	222.26 g/mol
Synonyms	1-Naphthalenesulfonic acid, 7-methyl-; 7-Methyl-1-naphthalenesulfonic acid; 7-Methylnaphthalene-1-sulphonic acid; 7-Methyl-1-naphthylsulfonic acid; 1-Sulfo-7-methylnaphthalene; 7-Methyl-1-naphthalene sulfonate; 7-Methylnaphthalenesulfonic acid; Contact for additional synonyms.
EINECS	Contact for details

Quality Control

Our 7-Methylnaphthalene-1-Sulfonic Acid is produced under stringent quality management protocols. Each batch undergoes comprehensive analytical testing, including HPLC for purity assessment and IR for structural confirmation, to ensure it meets exacting standards for use in sensitive synthesis applications. A detailed Certificate of Analysis (COA) is provided with every shipment to guarantee traceability, consistency, and compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive) and should be handled in a dry environment to prevent degradation. Keep away from strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.1%
Heavy Metals	≤ 20 ppm

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