NTP 10th Report on Carcinogens. IARC Cancer Review: Group 2B IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 ,1987,p. 56.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) ; Animal Sufficient Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 7 ,1974,p. 111.(World Health Organization, Internation Agency for Research on Cancer,Lyon, France.: ) (Single copies can be ordered from WHO Publications Centre U.S.A., 49 Sheridan Avenue, Albany, NY 12210) . Community Right-To-Know List. Reported in EPA TSCA Inventory. EPA Genetic Toxicology Program.

DFG MAK: Animal Carcinogen, Suspected Human Carcinogen

The Urethane with CAS registry number of 51-79-6 is also called Carbamic acid, ethylester. Its EINECS registry number is 200-123-1. The IUPAC name is ethyl carbamate. In addition, the molecular formula is C₃H₇NO₂ and the molecular weight is 89.09. It is a kind of white crystalline powder. And it is incompatible with strong acids, strong bases and strong oxidizing agents.

Physical properties about this chemical are: (1)ACD/LogP: -0.15; (2)ACD/LogD (pH 5.5): -0.15; (3)ACD/LogD (pH 7.4): -0.15; (4)ACD/BCF (pH 5.5): 1; (5)ACD/BCF (pH 7.4): 1; (6)ACD/KOC (pH 5.5): 19.74; (7)ACD/KOC (pH 7.4): 19.74; (8)#H bond acceptors: 3; (9)#H bond donors: 2; (10)#Freely Rotating Bonds: 2; (11)Polar Surface Area: 29.54 Å²; (12)Index of Refraction: 1.413; (13)Molar Refractivity: 21.25 cm³; (14)Molar Volume: 85.2 cm³; (15)Polarizability: 8.42 ×10^-24cm³; (16)Surface Tension: 33.6 dyne/cm; (17)Density: 1.045 g/cm³; (18)Flash Point: 97.2 °C; (19)Enthalpy of Vaporization: 42.03 kJ/mol; (20)Boiling Point: 184 °C at 760 mmHg; (21)Vapour Pressure: 0.748 mmHg at 25°C.

Preparation of Urethane: it can be prepared by urea nitrate, ethanol and sodium nitrite in the presence of sulfuric acid. This reaction is a kind of esterification reaction. Then go through the operation of distillation, crystallization and drying to get the products. In addition, it can be prepared by ethanol and cyanic acid;sodium cyanate. This reaction will need reagent HCl and solvent CH₂Cl₂. The reaction time is 6 hours at reaction temperature of -2 - 2 °C. The yield is about 90%.

Uses of Urethane: this chemical can be used as intermediates for medicine, pesticides and perfume. And it is used for biochemical research and the production of sleeping pills and tranquilizers. Moreover, it can be used as fungicides, cosolvent of injection and colorants in dyeing industry. In addition, it can be used to get isocyanatophosphoric acid-dichloride. This reaction will need reagent PCl₅ and solvent CH₂Cl₂. The reaction time is 4 hours by heating. The yield is about 65%.

When you are using this chemical, please be cautious about it as the following:
This chemical may cause cancer. Avoid exposure-obtain special instructions before use. In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.). In addition, you should keep container in a well-ventilated place.

You can still convert the following datas into molecular structure:
(1)SMILES: O=C(OCC)N
(2)InChI: InChI=1/C3H7NO2/c1-2-6-3(4)5/h2H2,1H3,(H2,4,5)
(3)InChIKey: JOYRKODLDBILNP-UHFFFAOYAY

The toxicity data is as follows: