CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | N-nitroso-n-methylurea appears as pale yellow crystals or light yellow moist powder. (NTP, 1992) |
|---|---|
| Color/Form | Colorless or yellow plates from ethanol |
| Melting Point | 255 °F (decomposes) (NTP, 1992) |
| Solubility | less than 1 mg/mL at 64 °F (NTP, 1992) |
| Density | less than 1.0 (NTP, 1992) |
| Vapor Pressure | Non-volatile (NTP, 1992) |
| LogP | log Kow = -0.03 |
| Stability/Shelf Life | Decomposes to diazomethane in alkaline solutions; stability in aqueous solutions is pH-dependent (at 20 °C). |
| Decomposition | Melting point: 124 °C (decomposition). |
| Other Experimental Properties | Decomposes to diazomethane in alkaline solutions; stability in aqueous solutions is pH dependent: pH 4.0, half-life 125 hours; pH 6.0, half-life 24 hours; pH 7.0, half-life 1.2 hours; pH 8.0, half-life 0.1 hours; and pH 9, half-life 0.03 hours (at 20 °C). |
| Chemical Classes | Nitrogen Compounds -> Nitrosamines |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Flame Flammables GHS02  Skull and Crossbones Acute Toxicity GHS06  Health Hazard GHS08 |
| GHS Hazard Statements |
H228:Flammable solids H301:Acute toxicity,oral H350:Carcinogenicity H360:Reproductive toxicity |
| Precautionary Statement Codes |
P201:Obtain special instructions before use. P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P301+P310:IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P308+P313:IF exposed or concerned: Get medical advice/attention. |
COMPUTED DESCRIPTORS
| Molecular Weight | 103.08 g/mol |
|---|---|
| XLogP3 | 0 |
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 3 |
| Rotatable Bond Count | 0 |
| Exact Mass | 103.038176411 g/mol |
| Monoisotopic Mass | 103.038176411 g/mol |
| Topological Polar Surface Area | 75.8 Ų |
| Heavy Atom Count | 7 |
| Formal Charge | 0 |
| Complexity | 90.9 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 0 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 0 |
| Undefined Bond Stereocenter Count | 0 |
| Covalently-Bonded Unit Count | 1 |
| Compound Is Canonicalized | Yes |
PRODUCT INTRODUCTION
description
N-nitroso-n-methylurea appears as pale yellow crystals or light yellow moist powder. (NTP, 1992)