Bicyclo[2.2.1]hepta-2,5-diene
Bicyclo[2.2.1]hepta-2,5-diene
CAS: 121-46-0
Molecular Formula: C7H8
Bicyclo[2.2.1]hepta-2,5-diene - Names and Identifiers
| Name | Bicyclo[2.2.1]hepta-2,5-diene |
| Synonyms | 2,5-Norbornadiene Bicycloheptadiene Bicyclo[2.2.1]hepta-2,5-diene (1s,4s)-Bbicyclo[2.2.1]hepta-2,5-diene Bicyclo[2.2.1]hepta-2,5-diene, stabilized Bicycol(2.2.1)hepta-2.5-diene (2.5-norbornadiene) |
| CAS | 121-46-0 |
| EINECS | 204-472-0 |
| InChI | InChI=1/C7H8/c1-2-7-4-3-6(1)5-7/h1-2H,3-5H2 |
| InChIKey | SJYNFBVQFBRSIB-UHFFFAOYSA-N |
Bicyclo[2.2.1]hepta-2,5-diene - Physico-chemical Properties
| Molecular Formula | C7H8 |
| Molar Mass | 92.14 |
| Density | 0.906g/mLat 25°C(lit.) |
| Melting Point | -20--19°C |
| Boling Point | 89°C(lit.) |
| Flash Point | 12°F |
| Water Solubility | Immiscible with water. |
| Vapor Presure | 69 hPa (20 °C) |
| Appearance | A liquid |
| Color | Colorless to Almost colorless |
| Maximum wavelength(λmax) | ['195nm(EtOH)(lit.)'] |
| BRN | 506224 |
| Storage Condition | Store below +30°C. |
| Explosive Limit | 1.6-6.3%(V) |
| Refractive Index | n20/D 1.470(lit.) |
Bicyclo[2.2.1]hepta-2,5-diene - Risk and Safety
| Hazard Symbols | F - Flammable |
| Risk Codes | 11 - Highly Flammable |
| Safety Description | S16 - Keep away from sources of ignition. S23 - Do not breathe vapour. |
| UN IDs | UN 2251 3/PG 2 |
| WGK Germany | 2 |
| RTECS | RB6535000 |
| FLUKA BRAND F CODES | 13 |
| TSCA | Yes |
| HS Code | 29021990 |
| Hazard Class | 3 |
| Packing Group | II |
| Toxicity | LD50 orl-rat: 890 mg/kg SHELL* |
Bicyclo[2.2.1]hepta-2,5-diene - Reference Information
| LogP | 2.67 at 25℃ and pH7 |
| surface tension | 64.3-64.4mN/m at 900 μg/L and 20.3 ℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Use | dicycloheptadiene (2, 5-norboradiene) has an ethylene-resistant effect on plants, and inhibit the activity of polyphenol oxidase, peroxidase and phenylalanine ammonia lyase. It is used to prepare cyclopentadiene-based pesticides and unsaturated polyester resins. Can be used for the synthesis of optical storage materials. intermediate for prostaglandin synthesis. |
| Application fields of norbornadiene | dicyclophanediene also known as 2, 5-norbornadiene, is a very easy to liquid, soluble in petroleum ether, insoluble in water. Commercial products typically contain 500ppm of 2, 6-di-tert-butyl-p-methylphenol (BHT) as a stabilizer. Analysis of the structural characteristics of NBD, it can be found that it has good reaction performance, through the addition or substitution reaction of double bonds can be synthesized a variety of organic compounds, in the solar energy conversion and storage system, light isomerization of norbornadiene to synthesis of tetracyclohexane is a very important reaction, through it and its isomer mutual isomerization reaction, will absorb or release 69KJ/mol of light energy; 2, 5-norboradiene is formulated together with ethylene biosynthesis inhibitor as a preservative, which can effectively inhibit the effect of ethylene on plants such as flowers, fruits and vegetables, and prolong the shelf life of plants, this kind of preservative is developing rapidly in foreign countries. In addition, dicycloheptadiene is also applied to a variety of olefin polymerization three-dimensional structure control agent, homogeneous noble metal catalyst ligand and full hydrogenation After used as high-energy fuel for racing car, missile and rocket. |
| category | flammable liquid |
| toxicity grade | poisoning |
| Acute toxicity | intraperitoneal-rat LD50: 890 mg/kg; Oral-mouse LD50: 3850 mg/kg |
| flammability hazard characteristics | open flame, combustible heat and oxidant; Combustion emission stimulus smoke |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature, separate from oxidants and acids |
| extinguishing agent | water mist, foam, sand, carbon dioxide, 1211 extinguishing agent |
| Occupational Standard | sel 1 mg/m3 |
| autoignition temperature | 350°C |
Last Update：2024-04-09 21:04:16
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