NTP 10th Report on Carcinogens. IARC Cancer Review: Group 2A 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) ; Human Limited Evidence IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 17 ,1978,p. 227.(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 . 17 ,1978,p. 227.(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) , IMEMDT    IARC Monographs on the Evaluation of Carcinogenic Risk of Chemicals to Man . 1 ,1972,p. 125.(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) . EPA Genetic Toxicology Program. Community Right-To-Know List. Reported in EPA TSCA Inventory.

N-Methyl-N-nitrosourea(CAS NO.684-93-5) is a highly reliable carcinogen, mutagen, and teratogen. NMU is an alkylating agent, and exhibits its toxicity by transferring its methyl group to nucleobases in nucleic acids. It is used as precursor of diazomethane. It has a cytotoxicity effect. This product contains an undetermined amount of water. N-Methyl-N-nitrosourea is teratogenic and embryotoxic, resulting in craniofacial (cleft palate) and skeletal defects, increased fetal resorption, and fetal growth retardation.

Physical properties about N-Nitroso-N-methylurea are: (1)ACD/LogP: -0.302; (2)ACD/LogD (pH 5.5): -0.30; (3)ACD/LogD (pH 7.4): -0.30; (4)ACD/BCF (pH 5.5): 1.00; (5)ACD/BCF (pH 7.4): 1.00; (6)ACD/KOC (pH 5.5): 16.32; (7)ACD/KOC (pH 7.4): 16.32; (8)#H bond acceptors: 5; (9)#H bond donors: 2; (10)#Freely Rotating Bonds: 1; (11)Index of Refraction: 1.545; (12)Molar Refractivity: 22.2 cm³; (13)Molar Volume: 70.241 cm³; (14)Polarizability: 8.801 10-24cm³; (15)Surface Tension: 61.148998260498 dyne/cm; (16)Density: 1.468 g/cm³; (17)Flash Point: 53.143 °C; (18)Enthalpy of Vaporization: 40.078 kJ/mol; (19)Boiling Point: 164.26 °C at 760 mmHg; (20)Vapour Pressure: 1.98300004005432 mmHg at 25°C

When you are using this chemical, please be cautious about it as the following:
1. Avoid exposure - obtain special instruction before use;
2. In case of accident or if you feel unwell, seek medical advice immediately (show label where possible);
3. Avoid contact with skin and eyes;
4. Do not breathe dust;

You can still convert the following datas into molecular structure:
(1)InChI=1S/C2H5N3O2/c1-5(4-7)2(3)6/h1H3,(H2,3,6);
(2)InChIKey=ZRKWMRDKSOPRRS-UHFFFAOYSA-N;
(3)SmilesN(C(N)=O)(N=O)C

 The toxicity data is as follows: