Methansulfonsure Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R34:Verursacht Verätzungen.
R22:Gesundheitsschädlich beim Verschlucken.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
S1/2:Unter Verschluss und für Kinder unzugänglich aufbewahren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
Chemische Eigenschaften
Methanesulfonic acid is a colourless or light yellow liquid having a melting point of 20° C, is a strong acid acting corroding but not oxidizing.
Methanesulfonic acid is used in the electroplating industry and for organic syntheses, in particular as a catalyst for alkylations, esterifications, and polymerizations. Beyond that, methanesulfonic acid is used as a starting material for the preparation of methanesulfonyl chloride.
Verwenden
Polymerization catalyst.
Methanesulfonic acid has been developed as an esterification catalyst in place of sulfuric acid for the synthesis of resins in paints and coatings. One of the major advantages of methanesulfonic acid over sulfuric acid is that it is not an oxidizing species.
synthetische
Methanesulfonic acid is produced predominantly by oxidizing methylthiol or dimethyl disulfide using nitric acid, hydrogen peroxide, chlorine or by employing electrochemical processes.
Definition
ChEBI: An alkanesulfonic acid in which the alkyl group directly linked to the sulfo functionality is methyl.
Allgemeine Beschreibung
Methanesulfonic acid (MSA) is a strong organic acid. The chemical oxidation of dimetyl sulfide in the atmosphere leads to the formation of MSA in large quantities. MSA undergoes biodegradation by forming CO
2 and sulphate. It is considered a green acid as it is less toxic and corrosive in comparison to mineral acids.1 The aqueous MSA solution has been considered a model electrolyte for electrochemical processes.
Hazard
Toxic by ingestion, skin irritant, corrosiveto tissue.
Sicherheitsprofil
Poison by ingestion and
intraperitoneal routes. May be corrosive to
skin, eyes, and mucous membranes.
Explosive reaction with ethyl vinyl ether.
Incompatible with hydrogen fluoride. When
heated to decomposition it emits toxic
fumes of SOx. See also SULFONATES.
läuterung methode
Dry the acid, either by azeotropic removal of water with *benzene or toluene, or by stirring 20g of P2O5 with 500mL of the acid at 100o for 0.5hours. Then distil it under vacuum and fractionally crystallise it by partial freezing. Sulfuric acid, if present, can be removed by prior addition of Ba(OH)2 to a dilute solution, filtering off the BaSO4 and concentrating under reduced pressure; and is sufficiently pure for most applications. [Beilstein 4 IV 10.]
Methansulfonsure Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
m-Aminobenzamid
Methansulfonsureanhydrid
TROVAFLOXACIN
Pefloxacin
Pazufloxacin
(S)-(-)-7,7'-BIS[DI(3,5-DIMETHYLPHENYL)PHOSPHINO]-2,2',3,3'-TETRAHYDRO-1,1'-SPIROBIINDANE
5-Methoxy-3-indazolecarboxylic acid
1,1'-SPIROBIINDANE-7,7'-DIOL
Coumarin 314T
Fluconazole
Pergolide
Gabexate mesylate
(11AR)-(+)-10,11,12,13-TETRAHYDRODIINDENO[7,1-DE:1',7'-FG][1,3,2]DIOXAPHOSPHOCIN-5-BIS(R)-1PHENYLETHYL]AMINE
Dodecylbenzolsulfonsäure,Natrium-Salz
ETHYL 4-FORMYL-2,5-DIMETHYL-1-(2-THIENYLMETHYL)-1H-PYRROLE-3-CARBOXYLATE
Sodium trifluoromethanesulfonate
Phentolaminmesilat
Methansulfonylchlorid
10-(2-Benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H,5H,11H-(1)benzopyropyrano(6,7-8-I,j)quinolizin-11-one
SAPERCONAZOLE
(11AR)-(+)-10,11,12,13-TETRAHYDRODIINDENO[7,1-DE:1',7'-FG][1,3,2]DIOXAPHOSPHOCIN-5-PHENOXY
9-Formyl-8-hydroxy-1,1,7,7-tetramethyljulolidine
5-Methoxyisatin
Dicofol (ISO)
Etofenprox
LIMAPROST
(11AR)-(+)-10,11,12,13-TETRAHYDRODIINDENO[7,1-DE:1',7'-FG][1,3,2]DIOXAPHOSPHOCIN-5-DIMETHYLAMINE
(R)-7,7'-BIS(DIPHENYLPHOSPHINO)-1,1'-SPIROBIINDANE
(S)-1,1'-SPIROBIINDANE-7,7'-DIOL
