2-Methylbutane, Synonyms: iso-Pentane, Isopentane, CAS# 78-78-4, chemical formula C₅H₁₂
2-Methylbutane, Synonyms: iso-Pentane, Isopentane, CAS# 78-78-4, chemical formula C₅H₁₂, Molar Mass: 72.15 g/mol, Chemical Formula: C₅H₁₂, EC Number: 201-142-8
Isopentane, also called methylbutane or 2-methylbutane, is a branched-chain saturated hydrocarbon with five carbon atoms, with formula C₅H₁₂ or CH(CH₃). Isopentane is an extremely volatile and extremely flammable liquid at room temperature and pressure. It is also the least dense liquid at standard conditions. The normal boiling point is just a few degrees above room temperature and isopentane will readily boil and evaporate away on a warm day.
Boiling point: 81.86°F (27.70°C)
Density: 0.62 g/cm³
Chemical formula: C5H12
Average Molar mass: 72.15 g/mol
Classification: Alkane
Key Specifications Table
| Description | |
|---|---|
| Catalogue Number | 106056 |
| Synonyms | iso-Pentane, Isopentane |
| Description | 2-Methylbutane |
| Product Information | |
|---|---|
| CAS number | 78-78-4 |
| EC index number | 601-006-00-1 |
| EC number | 201-142-8 |
| Hill Formula | C₅H₁₂ |
| Chemical formula | C₅H₁₂ |
| Molar Mass | 72.15 g/mol |
| HS Code | 2901 10 00 |
| Applications | |
|---|---|
| Application | 2-Methylbutane, CAS 78-78-4, chemical formula C₅H₁₂. |
| Physicochemical Information | |
|---|---|
| Boiling point | 28 °C (1013 hPa) |
| Density | 0.62 g/cm3 (20 °C) |
| Explosion limit | 1.3 – 7.6 %(V) |
| Flash point | -57 °C |
| Ignition temperature | 420 °C |
| Melting Point | -160 °C |
| Vapor pressure | 800 hPa (20 °C) |
| Solubility | 0.048 g/l |
| Hazard Statement(s) | H224: Extremely flammable liquid and vapour. H304: May be fatal if swallowed and enters airways. H336: May cause drowsiness or dizziness. H411: Toxic to aquatic life with long lasting effects. EUH066: Repeated exposure may cause skin dryness or cracking. |
| Precautionary Statement(s) | P210: Keep away from heat/sparks/open flames/hot surfaces. No smoking. P233: Keep container tightly closed. P240: Ground/bond container and receiving equipment. P273: Avoid release to the environment. P301 + P310: IF SWALLOWED: Immediately call a POISON CENTER/doctor. P331: Do NOT induce vomiting. P403 + P235: Store in a well-ventilated place. Keep cool. |
| Signal Word | Danger |
| RTECS | EK4430000 |
| Storage class | 3 Flammable liquids |
| WGK | WGK 2 obviously hazardous to water |
| Disposal | 1 Strongly contaminated halogen-free organic solvents: container A. |
| Safety Information | |
|---|---|
| Categories of danger | extremely flammable, harmful, dangerous for the environment |
| R Phrase | R 12-65-66-67-51/53 Extremely flammable.Harmful: may cause lung damage if swallowed.Repeated exposure may cause skin dryness or cracking.Vapours may cause drowsiness and dizziness.Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| S Phrase | S 9-16-29-33-61-62 Keep container in a well-ventilated place.Keep away from sources of ignition – No smoking.Do not empty into drains.Take precautionary measures against static discharges.Avoid release to the environment. Refer to special instructions/ Safety data sheets.If swallowed, do not induce vomiting: seek medical advice immediately and show this container or label. |
| Storage and Shipping Information | |
|---|---|
| Storage | Store at +2°C to +30°C. |
| Transport Information | |
|---|---|
| Declaration (railroad and road) ADR, RID | UN 1265 , 3, I |
| Declaration (transport by air) IATA-DGR | UN 1265 , 3, I |
| Declaration (transport by sea) IMDG-Code | UN 1265 , 3, I |
| Specifications | |
|---|---|
| Purity (GC) | ≥ 99.8 % |
| Evaporation residue | ≤ 0.0005 % |
| Water | ≤ 0.005 % |
| Colour | ≤ 10 Hazen |
| Acidity | ≤ 0.0002 meq/g |
| Alkalinity | ≤ 0.0002 meq/g |
| Fluorescence (as quinine at 254 nm) | ≤ 1.0 ppb |
| Fluorescence (as quinine at 365 nm) | ≤ 1.0 ppb |
| Transmission (at 190 nm) | ≥ 50 % |
| Transmission (at 200 nm) | ≥ 65 % |
| Transmission (at 210 nm) | ≥ 85 % |
| Transmission (at 215 nm) | ≥ 90 % |
| Transmission (from 240 nm) | ≥ 98 % |
| Absorbance (at 190 nm) | ≤ 0.30 |
| Absorbance (at 200 nm) | ≤ 0.19 |
| Absorbance (at 210 nm) | ≤ 0.07 |
| Absorbance (at 215 nm) | ≤ 0.05 |
| Absorbance (from 240 nm) | ≤ 0.01 |
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