| Molecular Formula | C4H10Se |
| Molar Mass | 137.08 |
| Density | 1.232g/mLat 25°C(lit.) |
| Melting Point | 55°C |
| Boling Point | 108°C(lit.) |
| Flash Point | 72°F |
| Vapor Presure | 30.9mmHg at 25°C |
| Appearance | solid |
| Refractive Index | 1.4768 |
| Risk Codes | R10 - Flammable R23/25 - Toxic by inhalation and if swallowed. R33 - Danger of cumulative effects R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S16 - Keep away from sources of ignition. S20/21 - S23 - Do not breathe vapour. S28 - After contact with skin, wash immediately with plenty of soap-suds. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 3440 6.1/PG 2 |
| WGK Germany | 3 |
| RTECS | VS6870000 |
| Hazard Class | 4.2 |
| Packing Group | I |
| category | flammable liquid |
| toxicity grade | poisoning |
| Acute toxicity | inhalation-mouse LCL0: 3000 mg/m3/10 min |
| explosive hazard characteristics | explosive when mixed with air |
| flammability hazard characteristics | in case of fire, high temperature, oxidant flammable; toxic nitrogen selenide smoke from combustion |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Stored separately from oxidants and acids |
| extinguishing agent | dry powder, dry sand, water mist, carbon dioxide, foam |
| Occupational Standard | TWA 0.2 mg (selenium)/m3 |