Neopentane
2,2-DIMETHYLPROPANE
CAS: 463-82-1
Molecular Formula: C5H12
Neopentane - Names and Identifiers
| Name | 2,2-DIMETHYLPROPANE |
| Synonyms | Neo-C5H12 Neopentan Neopentane dimethylpropane 2,2-Dimethylpropan 2,2-dimethyl-propan 2,2-DIMETHYLPROPANE 1,1,1-Trimethylethane |
| CAS | 463-82-1 |
| EINECS | 207-343-7 |
Neopentane - Physico-chemical Properties
| Molecular Formula | C5H12 |
| Molar Mass | 72.15 |
| Density | d00 0.613 (liq) |
| Melting Point | -19.8° |
| Boling Point | bp 9.5° |
| Water Solubility | 33.2 mg/kg at 25 °C (shake flask-GC, McAuliffe, 1966) |
| Solubility | Soluble in alcohol and ether (Weast, 1986). |
| Vapor Presure | 1,074.43 at 19.492 °C, 1,267.75 at 24.560 °C (ebulliometry, Osborn and Douslin, 1974) |
| Exposure Limit | ACGIH TLV: TWA 600 ppm (adopted). |
| pKa | >14 (Schwarzenbach et al., 1993) |
| Refractive Index | 1.3390 |
Neopentane - Risk and Safety
| Risk Codes | R12 - Extremely Flammable R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S9 - Keep container in a well-ventilated place. S16 - Keep away from sources of ignition. S33 - Take precautionary measures against static discharges. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | 2044 |
| Hazard Class | 2.1 |
| Toxicity | Acute oral LD50 (intraperitoneal) for mice 100 mg/kg (quoted, RTECS, 1985). |
Neopentane - Reference Information
| Henry's Law Constant | 3.70(atm?m3/mol) at 25 °C (Mackay and Shiu, 1981) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| category | flammable liquid |
| toxicity grade | low toxicity |
| Acute toxicity | inhalation-mouse LCL0: 1097g/m3/2 H; Abdominal cavity-mouse LD50: 100 mg/kg |
| explosive hazard characteristics | explosive when mixed with air |
| flammability hazard characteristics | in case of open flame, high temperature, flammable oxidant; Combustion stimulus smoke |
| 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, carbon dioxide, foam, 1211 extinguishing agent |
| Occupational Standard | TWA 1500 mg/m3; Tel 2300 mg/m3 |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 15:16:44
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