Description

Methanedisulphonic Acid CAS NO 503-40-2 is a versatile and highly reactive organic disulfonic acid, valued for its strong acidity and utility as a building block in organic synthesis. Its bifunctional structure makes it a critical intermediate for creating complex molecules, particularly in the pharmaceutical and specialty chemical sectors. This product is essential for researchers and manufacturers in fine chemical synthesis, pharmaceutical development, and polymer chemistry who require a reliable and high-purity sulfonating agent.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for sulfonamide-based drugs.
• Fine Chemical Synthesis: Acts as a catalyst or reagent in esterification, alkylation, and other organic transformations requiring strong acid conditions.
• Polymer Chemistry: Used in the production of ion-exchange resins, polyelectrolytes, and specialty polymers.
• Electroplating & Surface Treatment: Employed in specialized electroplating baths and as an additive for metal surface modification.
• Research & Development: Serves as a valuable tool in academic and industrial R&D for exploring new synthetic pathways.
• Dye & Pigment Manufacturing: Intermediate in the synthesis of sulfonated dyes and organic pigments.

Basic Information

Product Name	Methanedisulphonic Acid
CAS No.	503-40-2
Molecular Formula	CH4O6S2
Molecular Weight	176.17 g/mol
Synonyms	Methanedisulfonic Acid; Methylenedisulfonic Acid; Disulfomethane; Methane Disulfonic Acid; Methylene Disulfonic Acid; 1,1'-Methylenedisulfonic Acid; Methanedisulphonic Acid (IUPAC); MDS Acid
EINECS	207-971-1

Quality Control

Our Methanedisulphonic Acid is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. We provide comprehensive quality assurance, with specifications typically meeting or exceeding industry standards for technical and reagent grades. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are available for every batch upon request, supporting your compliance and R&D needs.

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). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture. Keep away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (Titration)	≥ 98.0%
Water Content (KF)	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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