1-BUTENE
1-butene
CAS: 106-98-9
Molecular Formula: C4H8
1-BUTENE - Names and Identifiers
| Name | 1-butene |
| Synonyms | 1-C4H8 1-BUTENE 1-butene Butene-1 But-1-ene -Butylene cis-butene alpha-Butene trans-butene .beta.-Butene Polybut-1-ene .alpha.-Butene alpha-Butylene 1-butene, homopolymer |
| CAS | 106-98-9 |
| EINECS | 203-449-2 |
| InChI | InChI=1/C4H8/c1-3-4-2/h1-4H2 |
| InChIKey | VXNZUUAINFGPBY-UHFFFAOYSA-N |
1-BUTENE - Physico-chemical Properties
| Molecular Formula | C4H8 |
| Molar Mass | 56.11 |
| Density | 0.5951 |
| Melting Point | −185°C(lit.) |
| Boling Point | −6.3°C(lit.) |
| Flash Point | 80 |
| Water Solubility | 222 mg/kg at 25 °C (shake flask-GC, McAuliffe, 1966) |
| Solubility | Soluble in alcohol, benzene, and ether (Weast, 1986) |
| Vapor Presure | 1939 mm Hg ( 21.1 °C) |
| Vapor Density | 1.93 (vs air) |
| Appearance | gas |
| Color | Colorless to Almost colorless |
| Odor | Slightly aromatic |
| Merck | 14,1519 |
| BRN | 1098262 |
| pKa | >14 (Schwarzenbach et al., 1993) |
| Storage Condition | -20°C Freezer |
| Stability | Volatile |
| Explosive Limit | 9.3% |
| Refractive Index | 1.3962 |
| Physical and Chemical Properties | Boiling point -6.25 ℃ freezing point -185.35 ℃ relative density 0.5951 refractive index 1.3962 flash point -80 ℃ solubility insoluble in water, soluble in ethanol, ether, benzene-soluble. |
| Use | Mainly used for dehydrogenation to butadiene, also can be synthesized by water n-butanol |
1-BUTENE - Risk and Safety
| Risk Codes | 12 - Extremely Flammable |
| Safety Description | S9 - Keep container in a well-ventilated place. S16 - Keep away from sources of ignition. S33 - Take precautionary measures against static discharges. |
| UN IDs | UN 1012 2.1 |
| WGK Germany | - |
| FLUKA BRAND F CODES | 4.5-31 |
| Hazard Note | Extremely Flammable |
| Hazard Class | 2.1 |
| Packing Group | II |
1-BUTENE - Nature
Open Data Verified Data
is a colorless, flammable gas at room temperature and atmospheric pressure. 1-Butene is soluble in ethanol and ether, insoluble in water. Easy to liquefy. In a low-pressure cylinder, it is shipped as liquefied petroleum gas at its own vapor pressure of 162kPa.
Last Update：2024-01-02 23:10:35
1-BUTENE - Hair-making
Open Data Verified Data
Industrial 1-butene (content 97%) was used as raw material, dried through silica gel, and then sent to a low-temperature rectification column. The Feed gas is condensed and liquefied by liquid nitrogen refrigerant in the distillation kettle, and then subjected to fractional distillation. It can be purified by batch distillation.
Last Update：2022-01-01 09:31:42
1-BUTENE - Use
Open Data Verified Data
used as standard gas and preparation of special standard mixture.
Last Update：2022-01-01 09:31:42
1-BUTENE - Safety
Open Data Verified Data
1-butene acts as an anesthetic at high concentrations. Its toxicity is about 4.5 times that of ethylene, skin contact liquid 1 butene will produce frostbite. After inhalation can appear shortness of breath, slow, muscle disorders, misjudgment, fatigue, Nausea, Vomit and other symptoms. The staff should be protected and the working environment should be well ventilated. Flammable, the cylinder should be stored in a well-ventilated place, away from the heat source and fire, not with oxygen, chlorine, strong oxidant or combustible stored together.
Last Update：2022-01-01 09:31:42
1-BUTENE - Reference Information
| olfactory threshold (Odor Threshold) | 0.36ppm |
| freezing point | -185.35 ℃ |
| Henry's Law Constant | (atm?m3/mol):0.25 at 25 °C (Hine and Mookerjee, 1975) |
| LogP | 2.35 at 20℃ |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| Overview | n-butene is a colorless gas under normal conditions with a weak aromatic smell. It is used to make butadiene, methyl ketone, ethyl ketone, sec-butanol, butylene oxide and butene polymers and copolymers. |
| use | 1-butene is the raw material for the preparation of 1, 2-butanediol and sec-butanol, and can be used to make the fungicide ethylconazole and the insecticide. It is mainly used for dehydrogenation to butadiene, and n-butanol can also be synthesized by water It is mainly used as standard gas for analytical instruments of petrochemical enterprises, atmospheric monitoring and scientific research and other fields One of the important basic chemical raw materials. The hydration of butene into sec-butanol can further produce methyl ethyl ketone, oxidative dehydrogenation to butadiene, catalytic oxidation to maleic anhydride and acetic acid, 1-butene self-polymerization can produce poly 1-butene, and ethylene copolymerization into Linear low density polyethylene. |
| production method | is mainly obtained by separation of C4 fraction. The butene content of C4 fractions from different sources varied. When separating butene isomers from C4 fraction, butadiene and isobutene are generally separated first, and then the remaining materials are rectified (or isomerized, adsorbed, etc.) to obtain 1-butene with purity higher than 99%. In some chemical applications (such as hydration to sec-butanol), the three isomers of butene can be used as raw materials, while butane and isobutane as inert substances do not affect the reaction. Therefore, in these situations, it is not necessary to separate one by one. In addition, there are other methods for the synthesis of butene. For example, ethylene dimerization can produce butene; n-butanol, isobutanol dehydration, or n-butane, isobutane dehydrogenation, etc. the content of 1-butene in C4 component obtained by tube furnace cracking and steam cracking method in naphtha cracking of petroleum fraction reaches about 35%, and 1-butene can be obtained by separating C4 fraction. |
| auto-ignition temperature | 723 °F |
| DOT Classification | 2.1 (Flammable gas) |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 19:05:09
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View History
1-BUTENE
N-Carbamoyl- L-Tryptophan
羟孕酮
5-ACETAMIDO-2-ETHOXY-BENZENESULFONYL CHLORIDE
金属锂粒
NSC 37027
FDP-Na3H
ETHYL3-OXO-2,3-DIHYDROAZULENO(2,1-B)THIOPHENE-9-CARBOXYLATE
4-ISOPROPYLBENZENETHIOL
EDTA Calcium Salt
N-Carbamoyl- L-Tryptophan
羟孕酮
5-ACETAMIDO-2-ETHOXY-BENZENESULFONYL CHLORIDE
金属锂粒
NSC 37027
FDP-Na3H
ETHYL3-OXO-2,3-DIHYDROAZULENO(2,1-B)THIOPHENE-9-CARBOXYLATE
4-ISOPROPYLBENZENETHIOL
EDTA Calcium Salt