513-35-9
2-Methyl-2-butene
CAS: 513-35-9
Molecular Formula: C5H10
513-35-9 - Names and Identifiers
| Name | 2-Methyl-2-butene |
| Synonyms | PENTENE N-AMYLENE beta-Isoamylene 2-METHYLBUTENE-2 2-methyl-2-buten 3-Methyl-2-butene alpha,eta-amylene 2-Methylbut-2-ene 2-Methyl-2-butene 2-Mdethyl-2-butene Perfluorokerosene-L |
| CAS | 513-35-9 |
| EINECS | 208-156-3 |
| InChI | InChI=1/C5H10/c1-4-5(2)3/h4H,1-3H3 |
513-35-9 - Physico-chemical Properties
| Molecular Formula | C5H10 |
| Molar Mass | 70.13 |
| Density | 0.662 g/mL at 25 °C (lit.) |
| Melting Point | -134 °C (lit.) |
| Boling Point | 35-38 °C (lit.) |
| Flash Point | −4°F |
| Water Solubility | Miscible with alcohol, benzene, ligroin, ethylene oxide and ether. Immiscible with water. |
| Vapor Presure | 25.7 psi ( 55 °C) |
| Vapor Density | 2.4 (vs air) |
| Appearance | Liquid |
| Color | Colorless |
| Merck | 14,607 |
| BRN | 1361353 |
| Storage Condition | 2-8°C |
| Explosive Limit | 8.7% |
| Refractive Index | n20/D 1.385(lit.) |
| Physical and Chemical Properties | Colorless volatile liquid. Melting Point -133.77 °c, boiling point 38.4 °c, relative density (20/4 °c) 0.6623, refractive index 1.3874, flash point -45 °c. Soluble in alcohol, ether, benzene, insoluble in water. Long-standing polymerization, with unpleasant odor. |
513-35-9 - Risk and Safety
| Risk Codes | R11 - Highly Flammable R22 - Harmful if swallowed R65 - Harmful: May cause lung damage if swallowed R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R12 - Extremely Flammable R36/37/38 - Irritating to eyes, respiratory system and skin. R19 - May form explosive peroxides R68 - Possible risk of irreversible effects R67 - Vapors may cause drowsiness and dizziness R38 - Irritating to the skin R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R40 - Limited evidence of a carcinogenic effect R36/37 - Irritating to eyes and respiratory system. |
| Safety Description | S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S9 - Keep container in a well-ventilated place. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S33 - Take precautionary measures against static discharges. S16 - Keep away from sources of ignition. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S62 - If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. S36/37 - Wear suitable protective clothing and gloves. |
| UN IDs | UN 2460 3/PG 2 |
| WGK Germany | 3 |
| RTECS | EM7580000 |
| TSCA | Yes |
| HS Code | 29012900 |
| Hazard Class | 3 |
| Packing Group | II |
513-35-9 - Reference Information
| LogP | 2.67 |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Introduction | 2-methyl-2-butene is a highly flammable and volatile colorless liquid, hardly soluble in water, and can be used for dehydrogenation to isoprene. It is also used as an intermediate for synthetic rubber, resin and organic synthesis. |
| Use | Used for dehydrogenation to isoprene, and also used as an intermediate for synthetic rubber, resin and organic synthesis. Admixture for improving octane number of gasoline. Gas chromatography contrast samples. |
| production method | isopentene (including three isomers) accounts for about 34% in the C5 fraction of catalytic cracking gasoline in refineries, and isopentene accounts for about 9% in the C5 fraction, the by-product of cracking ethylene in petrochemical plants. Isopentene can be separated when isoprene is extracted from C5 fraction by solvent method. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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