Methansulfonsure

Bezeichnung:Methansulfonsure

CAS-Nr75-75-2

Englisch Name:Methanesulfonic acid

CBNumberCB3433704

SummenformelCH4O3S

Molgewicht96.11

MOL-Datei75-75-2.mol

Synonyma

Methansulfonsure

Methansulfonsure physikalisch-chemischer Eigenschaften

Schmelzpunkt	17-19 °C (lit.)
Siedepunkt	167 °C/10 mmHg (lit.)
Dichte	1.475-1.485 g/mL at 20 °C 1.481 g/mL at 25 °C (lit.)
Dampfdichte	3.3 (vs air)
Dampfdruck	1 mm Hg ( 20 °C)
Brechungsindex	n20/D 1.429(lit.)
Flammpunkt	>230 °F
storage temp.	2-8°C
Löslichkeit	water: soluble1,000 g/L at 20°C
pka	-2.6(at 25℃)
Aggregatzustand	Solution
Wichte	1.48 (18/4℃)
Farbe	brown
Wasserlöslichkeit	Miscible with water. Slightly miscible with benzene and toluene. Immiscible with paraffins.
maximale Wellenlänge (λmax)	λ: 240-320 nm Amax: <0.4
Sensitive	Light Sensitive & Hygroscopic
Merck	14,5954
BRN	1446024
Stabilität	Stable. Moisture sensitive. Incompatible with amines, bases, water, common metals. Releases a substantial amount of heat when diluted with water (add acid to water with care if diluting).
InChIKey	AFVFQIVMOAPDHO-UHFFFAOYSA-N
CAS Datenbank	75-75-2(CAS DataBase Reference)
NIST chemische Informationen	CH3SO3H(75-75-2)
EPA chemische Informationen	Methanesulfonic acid (75-75-2)

Sicherheit

Kennzeichnung gefährlicher	C
R-Sätze:	34-22-21/22-35
S-Sätze:	26-36-45-1/2-36/37/39
RIDADR	UN 3265 8/PG 2
WGK Germany	1
RTECS-Nr.	PB1140000
TSCA	Yes
HazardClass	8
PackingGroup	III
HS Code	29041000
Giftige Stoffe Daten	75-75-2(Hazardous Substances Data)
Toxizität	LD50 orally in Rabbit: 649 mg/kg LD50 dermal Rabbit 200 - 2000 mg/kg

Gefahreninformationscode (GHS)

Methanesulfonic acid 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.
Verwenden
Methanesulfonic acid is used as a catalyst in organic reactions namely esterification, alkylation and condensation reactions due to its non- volatile nature and solubility in organic solvents. It is also involved in the production of starch esters, wax oxidate esters, benzoic acid esters, phenolic esters, or alkyl esters. It reacts with sodium borohydride in presence of polar solvent tetrahydrofuran to prepare borane-tetrahydrofuran complex. It finds application in batteries, because of its purity and chloride absence. In pharmaceutical industry, it is used for the manufacturing of active pharmaceutical ingredients like telmisartan and eprosartan. It is useful in ion chromatography and is a source of carbon and energy for some gram-negative methylotropic bacteria.It is involved in the deprotection of peptides.
Verwenden
For complete protein and peptide hydrolysis with tryptophan recovery. After hydrolysis the samples are diluted prior to amino acid analysis.
Definition
ChEBI: An alkanesulfonic acid in which the alkyl group directly linked to the sulfo functionality is methyl.
synthetische
Methanesulfonic acid is produced predominantly by oxidizing methylthiol or dimethyl disulfide using nitric acid, hydrogen peroxide, chlorine or by employing electrochemical processes.
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 CO₂ 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.]

Methanesulfonic acid Upstream-Materialien And Downstream Produkte

Methansulfonsure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

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