1,3-Dimethylharnstoff

Bezeichnung:1,3-Dimethylharnstoff

CAS-Nr96-31-1

Englisch Name:1,3-Dimethylurea

CBNumberCB6266530

SummenformelC3H8N2O

Molgewicht88.11

MOL-Datei96-31-1.mol

Synonyma

1,3-Dimethylharnstoff

1,3-Dimethylharnstoff physikalisch-chemischer Eigenschaften

Schmelzpunkt	101-104 °C(lit.)
Siedepunkt	268-270 °C(lit.)
Dichte	1.142
Dampfdruck	6 hPa (115 °C)
Brechungsindex	1.4715 (estimate)
Flammpunkt	157 °C
storage temp.	Store below +30°C.
Löslichkeit	H₂O: 0.1 g/mL, clear, colorless
pka	14.57±0.46(Predicted)
Aggregatzustand	Crystals
Farbe	White
PH	9.0-9.5 (100g/l, H2O, 20℃)
Wasserlöslichkeit	765 g/L (21.5 ºC)
BRN	1740672
InChIKey	MGJKQDOBUOMPEZ-UHFFFAOYSA-N
LogP	-0.783 at 25℃
CAS Datenbank	96-31-1(CAS DataBase Reference)
NIST chemische Informationen	Urea, N,N'-dimethyl-(96-31-1)
EPA chemische Informationen	1,3-Dimethylurea (96-31-1)

Sicherheit

R-Sätze:	62-63-68
S-Sätze:	22-24/25
WGK Germany	1
RTECS-Nr.	YS9868000
F	10-21
Selbstentzündungstemperatur	400 °C
TSCA	Yes
HS Code	29241900
Giftige Stoffe Daten	96-31-1(Hazardous Substances Data)
Toxizität	LD50 orally in Rabbit: 4000 mg/kg

Gefahreninformationscode (GHS)

1,3-Dimethylurea Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R62:Kann möglicherweise die Fortpflanzungsfähigkeit beeinträchtigen.
R63:Kann das Kind im Mutterleib möglicherweise schädigen.
R68:Irreversibler Schaden möglich.
S-Sätze Betriebsanweisung:
S22:Staub nicht einatmen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
Chemische Eigenschaften
white crystals
Verwenden
N,N′-Dimethylurea can be used:
- As a starting material to synthesize N,N′-dimethyl-6-amino uracil.
- In combination with β-cyclodextrin derivatives, to form low melting mixtures (LMMs), which can be used as solvents for hydroformylation and Tsuji-Trost reactions.
- To synthesize N,N′-disubstituted-4-aryl-3,4-dihydropyrimidinones via Biginelli condensation under solvent-free conditions.
Definition
ChEBI: A member of the class of ureas that is urea substituted by methyl groups at positions 1 and 3.
Allgemeine Beschreibung
Colorless crystals.
Air & Water Reaktionen
Water soluble.
Reaktivität anzeigen
1,3-Dimethylurea is an amide. Amides/imides react with azo and diazo compounds to generate toxic gases. Flammable gases are formed by the reaction of organic amides/imides with strong reducing agents. Amides are very weak bases (weaker than water). Imides are less basic yet and in fact react with strong bases to form salts. That is, they can react as acids. Mixing amides with dehydrating agents such as P2O5 or SOCl2 generates the corresponding nitrile. The combustion of these compounds generates mixed oxides of nitrogen (NOx).
Health Hazard
ACUTE/CHRONIC HAZARDS: When heated to decomposition 1,3-Dimethylurea emits toxic fumes.
Brandgefahr
Flash point data for 1,3-Dimethylurea are not available; 1,3-Dimethylurea is probably combustible.
Sicherheitsprofil
Moderately toxic by intraperitoneal route. Experimental teratogenic and reproductive effects. Human mutation data reported. When heated to decomposition it emits toxic fumes of NOx
läuterung methode
Crystallise the urea from acetone/diethyl ether by cooling in an ice bath. Also crystallise it from EtOH and dry it at 50o/5mm for 24hours [Bloemendahl & Somsen J Am Chem Soc 107 3426 1985]. [Beilstein 4 IV 207.]

1,3-Dimethylurea Upstream-Materialien And Downstream Produkte

1,3-Dimethylharnstoff Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

96-31-1, 1,3-Dimethylurea Verwandte Suche:

Send Inquriy