Description

Methanesulfonic Acid CAS NO 5459-84-7 is a versatile and strong organic acid with excellent solubility in water and organic solvents. It serves as a powerful catalyst and reagent in numerous organic syntheses, offering advantages over traditional mineral acids due to its non-oxidizing nature and ease of handling. This high-purity chemical is essential for industries including pharmaceuticals, electroplating, and polymer manufacturing, where consistent quality and reliable performance are critical.

Application

• Pharmaceutical Synthesis: Used as an acid catalyst in esterification, alkylation, and condensation reactions, and as a key reagent in the production of active pharmaceutical ingredients (APIs).
• Electroplating & Metal Finishing: Employed as a component in tin and lead electroplating baths, providing a stable, non-oxidizing acidic environment for superior metal deposition.
• Polymer & Resin Production: Acts as a catalyst in polymerization processes, including the production of phenolic and epoxy resins, and as a curing agent.
• Chemical Synthesis & Catalysis: A preferred catalyst in biodiesel production (transesterification) and various organic transformations where a strong, non-volatile acid is required.
• Gas Scrubbing & Treatment: Utilized in industrial gas treatment processes to remove basic impurities due to its strong acidity and thermal stability.
• Electronics & Semiconductor: Applied in the etching and cleaning of semiconductor surfaces and in the formulation of specialty electronic chemicals.

Basic Information

Item	Details
Product Name	Methanesulfonic Acid
CAS No.	5459-84-7
Molecular Formula	CH4O3S
Molecular Weight	96.11 g/mol
Synonyms	Methanesulphonic Acid; Methylsulfonic Acid; MSA; Mesylic Acid; Kyselina methansulfonova; UN 3265; NSC 3718
EINECS	226-739-8

Quality Control

Our Methanesulfonic Acid is manufactured under stringent quality management systems. Every batch undergoes comprehensive analytical testing to ensure it meets the high-purity standards required for industrial and fine chemical applications. A detailed Certificate of Analysis (COA) is provided with each shipment, confirming compliance with agreed specifications for identity, assay, and impurity profiles.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Due to its hygroscopic (moisture-sensitive) nature, containers should be kept tightly sealed when not in use to prevent absorption of atmospheric moisture. Recommended storage temperature is between 15°C and 25°C.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 99.0 %
Water Content (KF)	≤ 0.5 %
Sulfate (as SO4)	≤ 0.01 %
Chloride (Cl)	≤ 0.001 %
Iron (Fe)	≤ 0.001 %
Residue on Ignition	≤ 0.05 %

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