| Company Name: |
Energy Chemical |
| Tel: |
400-0056266 |
| Email: |
sales8178@energy-chemical.com |
- Cyclooctene
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- $1.00
-
2026-10-10
- CAS: 931-88-4
- Min. Order: 1KG
- Purity: 99%
- Supply Ability: 20T
- cis-Cyclooctene
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- $100.00
-
2026-09-02
- CAS:931-88-4
- Min. Order: 1KG
- Purity: 99%
- cis-Cyclooctene
-
- $1.00
-
2019-12-24
- CAS:931-88-4
- Min. Order: 1KG
- Purity: 98%HPLC
- Supply Ability: 10t
|
| | cis-Cyclooctene Basic information |
| | cis-Cyclooctene Chemical Properties |
| Melting point | −16 °C(lit.) | | Boiling point | 32-34 °C12 mm Hg(lit.) | | density | 0.848 g/mL at 20 °C(lit.) | | refractive index | n20/D 1.470 | | Fp | 77 °F | | Water Solubility | Insoluble in water | | color | Colorless to Almost colorless | | BRN | 1901031 | | Henry's Law Constant | 2.1×10-4 mol/(m3Pa) at 25℃, Brockbank (2013) | | LogP | 3.930 | | CAS DataBase Reference | 931-88-4(CAS DataBase Reference) | | NIST Chemistry Reference | Cyclooctene(931-88-4) | | EPA Substance Registry System | Cyclooctene (931-88-4) |
| Hazard Codes | Xn | | Risk Statements | 10-65 | | Safety Statements | 29-33-62-16 | | RIDADR | UN 3295 3/PG 3 | | WGK Germany | 3 | | TSCA | TSCA listed | | HS Code | 2902.19.0050 | | HazardClass | 3.2 | | PackingGroup | III |
| | cis-Cyclooctene Usage And Synthesis |
| Purification Methods | The cis-isomer is freed from the trans-isomer by fractional distillation through a spinning-band column, followed by preparative gas chromatography on a Dowex 710-Chromosorb W GLC column. It is passed through a short alumina column immediately before use [Collman et al. J Am Chem Soc 108 2588 1986]. It has also been distilled in a dry N2 glove box from powdered fused NaOH through a Vigreux column (p 11), then passed through activated neutral alumina before use [Wong et al. J Am Chem Soc 109 4328 1987]. Alternatively it can be purified via the AgNO3 salt. This salt is obtained from crude cyclooctene (40 mL) by shaking at 70-80o with 50% w/w AgNO3 (2 x 15 mL) to remove cyclooctadienes (aqueous layer). Extraction is repeated at 40o (4 x 20 mL, of 50% AgNO3). Three layers are formed each time. The middle layer contains the AgNO3 adduct of cyclooctene which crystallises on cooling the layer to room temperature. The adduct (complex 2:1) is highly soluble in MeOH (at least 1g/mL) from which it crystallises in large flat needles when cooled at 0o. It is dried under slight vacuum for 1 week in the presence of CaCl2 and paraffin wax soaked in cyclooctene. It has m 51o and loses hydrocarbon on exposure to air. cis-Cyclooctene can be recovered by steam distillation of the salt, collected, dried (CaCl2) and distilled in vacuum. [Braude et al. J Chem Soc 4711 1957, AgNO3: Jones J Chem Soc 1808 1954, Cope & Estes J Am Chem Soc 72 1128 1950, Beilstein 5 I 35, 5 IV 263.] FLAMMABLE LIQUID. |
| | cis-Cyclooctene Preparation Products And Raw materials |
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