METHANESULFONIC ANHYDRIDE

PRODUCT IDENTIFICATION
CAS NO. 7143-01-3

METHANESULFONIC ANHYDRIDE
EINECS NO. 230-442-1
FORMULA (CH3SO2)2O
MOL WT. 174.19
H.S. CODE  
TOXICITY  
SYNONYMS Methansulfonsäureanhydrid; Anhídrido metanosulfónico;
Methanesulphonic anhydride; Anhydride méthanesulfonique; Methylsulphonic acid, anhydride; Mesic anhydride;
SMILES 
 

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

off-white corrosive crystals
MELTING POINT 65 - 70 C
BOILING POINT 138 at 10 mm Hg
SPECIFIC GRAVITY

 
SOLUBILITY IN WATER  
AUTOIGNITION

 
pH  
VAPOR DENSITY  
NFPA RATINGS  
FLASH POINT

 
STABILITY Stable under ordinary conditions. Moisture sensitive

APPLICATIONS
Sulfonic acid is a compound with general formula RSO2OH, where R is an aliphatic or aromatic hydrocarbon. It is a derivative of sulfuric acid (HOSO2OH) where an OH has been replaced by a carbon group or a compound where a hydrogen atom has been replaced by treatment with sulfuric acid; for example, benzene is converted to benzenesulfonic acid (water-soluble). Sulfonic acid has a sulfur atom bonded to a carbon atom of a hydrocarbon and bonded also to three oxygen atoms, one of which has been attached to a hydrogen atom. Sulfonic acid is acidic due to the hydrogen atom, stronger than a carboxylic acid. Sulfonic acid is one of the most important organo sulfur compounds in organic synthesis. Sulfonic acids are used as catalysts in esterification, alkylation and condensation reactions. Sulfonates are salts or esters of sulfonic acid. Sulfonic salts are soluble in water. Sulfonic acid and its salts present in organic dyes provide useful function of water solubility and or improve the washfastness of dyes due to their capabiltity of binding more tightly to the fabric. They are widely used in the detergent industry. Alkylbenzene sulfonic acid is the largest-volume synthetic surfactant because of its relatively low cost, good performance, the fact that it can be dried to a stable powder and the biodegradable environmental friendliness. Sulfonate cleaners do not form an insoluble precipitates in hard water. Sulfonic acid salts and esters are intermediates widely used in organic synthesis and particularly phenolic compounds and cation exchange resins. They are synthetic intermediate for a number of biologically active compounds and pharmaceutical candidates such as sulfa drugs. Short carbon chain metallic sulfonate is used in electroplating which is a process for applying a metallic coating on a metal surface by electrodeposition from a suitable electrolyte solution for imparting corrosion resistance and direct production of printed circuit boards without etching out of a piece of copper sheet. Methanesulfonic acid is used as the acid electrolyte in the electroplating because many metals which are not soluble in mineral or organic acids are soluble, particularly tin and lead plating. Stannic sludge formation is rare as methanesulfonic acid is a non-oxidizing acid. Electroplating baths for lead frames, connectors, printed circuit boards, and wire are complex of methanesulfonic acid itself and its salts along with additives enhancing the performance.

Methylsulphonic acid has applications in the fields include:

  • Electroplating and electrochemical processes
  • Alkylation, esterification and condensation reactions
  • Lead recovery
  • Chemical intermediate for manufacture of drugs and pesticides
  • Petroleum refining and lube oil additives
  • Extraction and process solvent
  • Plastic stabilizers

Mesyl Chloride is widely used as a catalyst, chlorination agent and stabilizer for organic synthesis and as an intermediate for photographic chemicals, agrochemcials, dyses and pharmaceuticals. It can be used as a bactericide.

Anhydride is a chemical compound formed by the abstraction of a molecule of water, H2O, from a substance. The term acid anhydride is restricted sometime to the anhydride formed especially from an acid by dehydration or one that revert to the original substance upon hydration. In case of bimolecular, it can be composed of two molecules of the corresponding acid. The term mixed anhydride is an acid anhydride composed of two different acids. Examples are adenosine triphosphate or an aminoacyl adenylate. The anhydrides of bases are oxides. Anhydrides of inorganic acids are usually oxides of nonmetallic elements. Carbon dioxide (CO2) is the anhydride of carbonic acid, dinitrogen pentoxide (N2O5) is the anhydride of nitric acid, and, phosphorus pentoxide (P2O5) is the anhydride of phosphoric acid, and sulfur trioxide (SO3) is the anhydride of sulfuric acid. Examples of inorganic anhydrides include dinitrogen pentoxide, which is the anhydride of nitric acid, and sulfur trioxide, which is the anhydride of sulfuric acid. Organic anhydrides contain the carbonyl group (CO). Organic anhydrides are formed by the condensation of original acids. Lactone, an internal cyclic monoester, is an anhydride derived from the hydroxyl and carboxyl radicals. The names of anhydrides derived from carboxylic acids are given first from the original acid followed by the separate word anhydride. Anhydrides are more reactive than the parent acids. Anhydrides are typically not target molecules, but rather they are used as intermediates for the synthesis of other organic members such as esters and amides for the industrial applications include dyes, pharmaceuticals, pesticides, plastics, fibers, curing agents, plasticizers and many others. Methanesulfonic anhydride is useful in the reaction for aromatic alkylation.

SALES SPECIFICATION

APPEARANCE

off-white crystals
CONTENT

98.0% min

MELTING POINT

 65 - 70 C
WATER 2.0% max
TRANSPORTATION
PACKING 50kgs in drum
HAZARD CLASS 8 (Packing Group: II)
UN NO. 3261
OTHER INFORMATION
Hazard Symbols: C, Risk Phrases: 14-35, Safety Phrases: 26-36/37/39-45