2-Norbornene, 5-ethylidene-
5-Ethylidene-2-norbornene, mixt. of endo-and exo-isomers
CAS: 16219-75-3
Molecular Formula: C9H12
2-Norbornene, 5-ethylidene- - Names and Identifiers
2-Norbornene, 5-ethylidene- - Physico-chemical Properties
| Molecular Formula | C9H12 |
| Molar Mass | 120.19 |
| Density | 0.893g/mLat 25°C(lit.) |
| Melting Point | -80.15°C |
| Boling Point | 146°C(lit.) |
| Flash Point | 101°F |
| Water Solubility | Soluble in water (0.01% at 20C). |
| Vapor Presure | 4.6 mm Hg ( 20 °C) |
| Vapor Density | 4.1 (vs air) |
| Appearance | Liquid |
| Color | Colorless to Almost colorless |
| Exposure Limit | ACGIH: TWA 2 ppm; STEL 4 ppmNIOSH: Ceiling 5 ppm(25 mg/m3) |
| Storage Condition | Flammables area |
| Explosive Limit | ~6.4% |
| Refractive Index | n20/D 1.49(lit.) |
| Physical and Chemical Properties | Colorless volatile liquid with strong camphor-like odor. There are cis and trans isomers. CIS boiling point 147.35 ℃, trans boiling point 148.57 ℃, freezing point -80 ℃, relative density 0.90(15/4 ℃), refractive index 1.4856(30 ℃), flash point 38 ℃. Irritant, easy to be oxidized. For storage, 100ppm of p-tert-butylcatechol was used as the anionic agent. |
2-Norbornene, 5-ethylidene- - Risk and Safety
| Risk Codes | R10 - Flammable R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. R65 - Harmful: May cause lung damage if swallowed R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R48/20 - R43 - May cause sensitization by skin contact R38 - Irritating to the skin R20 - Harmful by inhalation |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S62 - If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 2929 6.1/PG 2 |
| WGK Germany | 2 |
| RTECS | RB9450000 |
| TSCA | Yes |
| HS Code | 29021990 |
| Hazard Class | 3 |
| Packing Group | III |
2-Norbornene, 5-ethylidene- - Reference Information
| LogP | 3.82 at 20℃ |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| purpose | This product is used as the third monomer, and ethylene-propylene rubber can be obtained by copolymerization with ethylene and propylene. The vulcanization speed of the secret rubber is faster than that of the other third monomer, and the disadvantage of the slow vulcanization speed of the ethylene propylene ethylene propylene rubber can be overcome. It also has resistance to ozone, chemical (solvent, acid, alkali, etc.), resistance to discharge, resistance to water vapor and other properties. Therefore, it can be used as a modified material for building materials such as rubber products and waterproof boards around the engine and impact-resistant plastics. as the third monomer, the product can be copolymerized with ethylene and propylene to obtain ethylene-propylene-diene monomer. The vulcanization speed of the prepared rubber is faster than that of other third monomers, which can overcome the disadvantage of slow vulcanization speed of Ethylene Propylene Rubber. It also has ozone resistance; Chemical resistance (solvent; Acid; Alkali, etc.); Resistance to discharge; Resistance to water vapor and other properties. Therefore, it can be used as rubber products around the engine; Waterproof board and other building materials and modified materials of impact resistant plastics |
| production method | cyclopentadiene (or dicyclopentadiene) and 1,3-butadiene was reacted by Diels-Alder (Diels-Alder) to obtain vinyl norbornene, and then subjected to isomerization reaction to generate ethylene norbornene. Another preparation method is using butadiene as raw material, through the chlorination of 3-chloro-1-butene, and then with the addition of 5-(1-chloroethyl)-2-norbornene, finally, the product is obtained by removing hydrochloric acid from calcium oxide. |
| 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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