Formaldehyde was first reported by the Russian chemist Aleksandr Butlerov (1828-1886), but it was conclusively identified by August Wilhelm von Hofmann.
Molecular Structure of Allylurea (CAS NO.557-11-9):
IUPAC Name: prop-2-enylurea
Empirical Formula: C4H8N2O
Molecular Weight: 100.1191
Index of Refraction: 1.465
Surface Tension: 35.5 dyne/cm
Density: 1.008 g/cm3
Flash Point: 55.3 °C
Enthalpy of Vaporization: 40.44 kJ/mol
Boiling Point: 167.9 °C at 760 mmHg
Vapour Pressure: 1.66 mmHg at 25°C
Synonyms of Allylurea (CAS NO.557-11-9): 1-Allylurea ; 2-propenyl-ure ; allyl-ure;Monoallylurea ; Urea, 2-propenyl- ; Allylurea ; Allylcarbamide ; 2-Propenylurea
mmo-sat 1 mg/plate
|EMMUEG Environmental and Molecular Mutagenesis. 19 (Suppl 21)(1992),2.|
orl-rat LDLo:250 mg/kg
|NCNSA6 National Academy of Sciences, National Research Council, Chemical-Biological Coordination Center, Review. 5 (1953),47.|
orl-mus LDLo:1070 mg/kg
|AECTCV Archives of Environmental Contamination and Toxicology. 14 (1985),111.|
Reported in EPA TSCA Inventory.
Poison by ingestion. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx. See also ALLYL COMPOUNDS.
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed.
R37:Irritating to respiratory system
S36/37:Wear suitable protective clothing and gloves.
Allylurea (CAS NO.557-11-9) is a highly toxic chemical, flammable, should be stored in low temperature, ventilation, drying and oxidation environmental conditions, separated with food ingredients , water, carbon dioxide , dry powder, sand, water mist fire extinguishing can be used if urgency.
The chemical Properties of Allylurea (CAS NO.557-11-9) is a white needle crystal. Melting point is 85 ℃, soluble in water and ethanol, slightly soluble in ether and chloroform, practically insoluble in petroleum ether, benzene and carbon disulfide, easy deliquescence. Hazardous Decomposition Products are carbon monoxide, oxides of nitrogen, carbon dioxide, hazardous polymerization will not occur.
The use of Allylurea (CAS NO.557-11-9) is to compose allyl thiourea as preservatives.