51-79-6
Product Name:
Urethane
Formula:
C3H7NO2
Synonyms:
Carbamic acid ethyl ester;Ethyl carbamate;Ethylurethane
Inquiry
CHEMICAL AND PHYSICAL PROPERTIES
| Physical Description | Urethane appears as odorless colorless crystals or white powder. Sublimes readily at 217 °F and 54 mmHg. Cooling saline taste. |
|---|---|
| Color/Form | Colorless, columnar crystals or white, granular powder |
| Odor | Almost odorless |
| Taste | Cooling, saline, bitter taste |
| Boiling Point | 360 to 363 °F at 760 mmHg (NTP, 1992) |
| Melting Point | 118 to 122 °F (NTP, 1992) |
| Flash Point | 198 °F (NTP, 1992) |
| Solubility | greater than or equal to 100 mg/mL at 72 °F (NTP, 1992) |
| Density | 0.9862 at 70 °F (NTP, 1992) - Less dense than water; will float |
| Vapor Density | 3.07 (NTP, 1992) - Heavier than air; will sink (Relative to Air) |
| Vapor Pressure | 5 mmHg at 150.4 °F ; 10 mmHg at 172.0 °F; 20 mmHg at 195.8 °F (NTP, 1992) |
| LogP | -0.15 |
| LogS | 0.85 |
| Henry's Law Constant | Henry's Law constant = 6.4X10-8 atm-cu m/mole at 25 °C /Estimated/ |
| Stability/Shelf Life | ... Samples of model alcoholic beverages were stored under various conditions using red, yellow and blue cellophanes. The amount of ethyl carbamate formed in the model alcoholic beverage with blue cellophane was larger than in the cases of red and yellow cellophanes. It was found that the amount of ethyl carbamate formed in the model alcoholic beverage was increased by light in the wavelength range of 375-475 nm. |
| Decomposition | When heated /to decomposition/ it emits toxic fumes of /nitrogen oxide/. |
| Heat of Combustion | 397.2 kcal/g mol wt at 25 °C |
| Heat of Vaporization | 13,078.6 gcal/gmole |
| pH | Aqueous solution is neutral |
| Refractive Index | Index of refraction: 1.4144 at 51 °C/D |
| Kovats Retention Index | 838 |
| Other Experimental Properties | Sublimes readily at 103 °C and 54 mm pressure |
| Chemical Classes | Other Classes -> Carbamic Acid Esters |
SAFETY INFORMATION
| Signal word | Danger |
|---|---|
| Pictogram(s) |
 Exclamation Mark Irritant GHS07  Health Hazard GHS08 |
| GHS Hazard Statements |
H302:Acute toxicity,oral H350:Carcinogenicity |
| Precautionary Statement Codes |
P201:Obtain special instructions before use. P308+P313:IF exposed or concerned: Get medical advice/attention. |
COMPUTED DESCRIPTORS
| Molecular Weight | 89.09 g/mol |
|---|---|
| XLogP3 | -0.2 |
| Hydrogen Bond Donor Count | 1 |
| Hydrogen Bond Acceptor Count | 2 |
| Rotatable Bond Count | 2 |
| Exact Mass | 89.047678466 g/mol |
| Monoisotopic Mass | 89.047678466 g/mol |
| Topological Polar Surface Area | 52.3 Ų |
| Heavy Atom Count | 6 |
| Formal Charge | 0 |
| Complexity | 52.8 |
| 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
Urethane appears as odorless colorless crystals or white powder. Sublimes readily at 217 °F and 54 mmHg. Cooling saline taste.