Methylcarbamat

Bezeichnung:Methylcarbamat

CAS-Nr598-55-0

Englisch Name:Methyl carbamate

CBNumberCB3111217

SummenformelC2H5NO2

Molgewicht75.07

MOL-Datei598-55-0.mol

Synonyma

Methylcarbamat

Methylcarbamat physikalisch-chemischer Eigenschaften

Schmelzpunkt	56-58 °C (lit.)
Siedepunkt	176-177 °C (lit.)
Dichte	1,14 g/cm³
Brechungsindex	1.4125
Flammpunkt	93 °C
storage temp.	Inert atmosphere,Room Temperature
Löslichkeit	700 g/L (20°C)
pka	13.37±0.50(Predicted)
Aggregatzustand	Adhering Crystals
Farbe	White
PH	6-8 (50g/l, H2O, 20℃)
Wasserlöslichkeit	700 g/L (20 ºC)
Sensitive	Moisture Sensitive
Merck	14,6036
BRN	635779
CAS Datenbank	598-55-0(CAS DataBase Reference)
IARC	3 (Vol. 12, Sup 7) 1987
NIST chemische Informationen	Carbamic acid, methyl ester(598-55-0)
EPA chemische Informationen	Methyl carbamate (598-55-0)

Sicherheit

Kennzeichnung gefährlicher	Xn,T
R-Sätze:	36-40-61
S-Sätze:	26-36/37-36-22-45-53
WGK Germany	3
RTECS-Nr.	FC2450000
TSCA	Yes
HS Code	29241900
Giftige Stoffe Daten	598-55-0(Hazardous Substances Data)

Gefahreninformationscode (GHS)

Methyl carbamate Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36:Reizt die Augen.
R40:Verdacht auf krebserzeugende Wirkung.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37:Bei der Arbeit geeignete Schutzhandschuhe und Schutzkleidung tragen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S22:Staub nicht einatmen.
Chemische Eigenschaften
Methyl carbamate is a white, adhesive crystal. It is highly soluble in water, as well as in ethanol, acetone, and other organic solvents.
Verwenden
Methyl carbamate was used in the synthesis of protected aminocyclopropanes.
synthetische
Methyl carbamate was synthesized by the following preparation. MDI (5.00 g,0.020mol) and 100 ml of dried acetone were weighed into a Ng-filled three-neck flask.Methanol (5 g, an excess amount) is added dropwise to the stirred MDI solution in the flask,and then the solution was heated to 56 C. After 24 hrs， the reaction mixture was cooled down to room temperature and evaporated to give a crude solid at about 100% yield. The following recrystallization procedure gave 3.1 g of a white solid (0.012 mol，60% yield). The disappearance of FT-IR stretching band of the isocyanate group (-N=C=O, 2280 cm') confirmed that the reaction was complete.
Definition
ChEBI: Methyl carbamate is a carbamate ester resulting from the formal condensation of the carboxy group of carbamic acid with methanol.
Allgemeine Beschreibung
Methyl carbamate appears as white to Almost white powder to crystal. It an intermediate in the manufacture of dimethylol methyl carbamate-based resins, which are used in the textile industry as durable-press fabric finishes for polyester/cotton blends.
Air & Water Reaktionen
Water soluble.
Reaktivität anzeigen
Methyl carbamate is a carbamate ester. Carbamates are chemically similar to, but more reactive than amides. Like amides they form polymers such as polyurethane resins. Carbamates are incompatible with strong acids and bases, and especially incompatible with strong reducing agents such as hydrides. Flammable gaseous hydrogen is produced by the combination of active metals or nitrides with carbamates. Strongly oxidizing acids, peroxides, and hydroperoxides are incompatible with carbamates.
Brandgefahr
Flash point data for Methyl carbamate are not available; however, Methyl carbamate is probably combustible.
Sicherheitsprofil
Poison by ingestion and intraperitoneal routes. Questionable carcinogen with experimental carcinogenic and tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx. See also CARBAMATES.
läuterung methode
Crystallise the carbamate from *benzene or distil it. [Beilstein 3 H 21.]

Methyl carbamate Upstream-Materialien And Downstream Produkte

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