CyclooctatetraeneCOTpaleyellowliq
1,3,5,7-Cyclooctatetraene
CAS: 629-20-9
Molecular Formula: C8H8
CyclooctatetraeneCOTpaleyellowliq - Names and Identifiers
| Name | 1,3,5,7-Cyclooctatetraene |
| Synonyms | COT 1,3,5,7-COT [8]Annulene CYCLOOCTATETRAENE cyclooctatetraene stab. 1,3,5,7-Cyclooctatetraene 1,3,5,7-CYCLOOCTATETRAENE cycloocta-1,3,5,7-tetraene CYCLOOCTATETRAENE(1,3,5,7-) CyclooctatetraeneCOTpaleyellowliq |
| CAS | 629-20-9 |
| EINECS | 211-080-3 |
| InChI | InChI=1/C8H8/c1-2-4-6-8-7-5-3-1/h1-8H/b2-1-,3-1-,4-2-,5-3-,6-4-,7-5-,8-6-,8-7- |
CyclooctatetraeneCOTpaleyellowliq - Physico-chemical Properties
| Molecular Formula | C8H8 |
| Molar Mass | 104.15 |
| Density | 0.925 g/mL at 25 °C (lit.) |
| Melting Point | -5--3 °C (lit.) |
| Boling Point | 142-143 °C (lit.) |
| Flash Point | 72°F |
| Water Solubility | Not miscible or difficult to mix in water. |
| Vapor Presure | 7.64mmHg at 25°C |
| Appearance | Liquid |
| Specific Gravity | 0.943 |
| Color | Turbid yellow to yellow-brown |
| BRN | 2496800 |
| Storage Condition | -20°C |
| Stability | Stability Unstable - commercial product may be stabilized by the addition of a small amount of hydroquinone. May form explosive peroxides in storage. Do not distill to small volume. |
| Sensitive | Light Sensitive |
| Refractive Index | n20/D 1.537(lit.) |
| Physical and Chemical Properties | Golden yellow liquid. Melting Point -4.7 °c (freezing point -7 °c), boiling point 142-143 °c (140.5 °c), relative density 0.9206(20/4 °c), refractive index 1.5290, flash point 22 °c. |
CyclooctatetraeneCOTpaleyellowliq - Risk and Safety
| Risk Codes | R10 - Flammable R36/37/38 - Irritating to eyes, respiratory system and skin. R65 - Harmful: May cause lung damage if swallowed R61 - May cause harm to the unborn child |
| Safety Description | 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. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S53 - Avoid exposure - obtain special instructions before use. |
| UN IDs | UN 2358 3/PG 2 |
| WGK Germany | 3 |
| RTECS | GY0175600 |
| FLUKA BRAND F CODES | 8-10 |
| TSCA | Y |
| HS Code | 29021900 |
| Hazard Class | 3 |
| Packing Group | II |
CyclooctatetraeneCOTpaleyellowliq - Reference Information
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | cycloocta-tetraenes are typical unsaturated hydrocarbons without the characteristics of benzene-based compounds. It can react with bromine, hydrogen halide acid and the like, and can also catalyze hydrogenation to generate cyclooctane, which is easy to be oxidized and polymerized, and is used in the manufacture of synthetic fibers, dyes, drugs and the like. |
| production method | in, a German chemist R. Wilschmitt used pseudo-punicine as a raw material to prepare cyclooctraene. During the Second World War, the German chemist J. W. Repe discovered that four acetylene molecules were cyclized in the presence of nickel cyanide and under pressure to produce cyclooctylene, which was used for mass preparation. |
Last Update：2024-04-09 20:00:08
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