Cyclopentane #CAS287-92-3
CAS Number:287-92-3
Chemical Formula: C5H10
Synonyms:
CYCLOPENTANE
Cyclopentan
PENTAMETHYLENE
Appearance:White Powder
MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)
Cyclopentane #CAS287-92-3
Cyclopentane, also known as "pentamethylene", is a kind of cycloalkane with the formula of C5H10. It has a molecular weight of 70.13. It exists as a kind of flammable liquid. It has a melting point-94.4 °C, boiling point of 49.3 °C, relative density of 0.7460 and the refractive index of 1.4068. It is soluble in alcohol, ether and hydrocarbons and is not soluble in water. Cyclopentane is not a planar ring and has two conformations: envelope conformations and semi-chair conformations. The carbon-carbon-carbon bond angle is close to 109 ° 28 ' with the molecular tension not big and the ring being relatively stable. It has a similar chemical property as alkanes. The lethal concentration in the air for the rats was 3.8 × 10-2. It exhibits red yellow color when having reaction with fuming sulfuric acid while generating nitro cyclopentane and glutaric acid through reaction with nitric acid. Method: it can be obtained from the petroleum ether distillate, through high-pressure cracking on the cyclohexane in the presence of aluminum or catalytic hydrogenation of cyclopentene and cyclopentadiene. Purposes: mainly used as a solvent.
It appears as colorless liquid with a melting point of-93.9 °C, the boiling point of 49.26 ° C, the relative density of 0.7460 (20/4 ° C), the refractive index of 1.4068 and the flash point of-37 °C. It is miscible with alcohol, ether and other organic solvents, being not be easy to be dissolved in water.
Cyclopentane is a colorless liquid. Molecularweight=70.15; Specific gravity=(H2O:1)=0.75; Boilingpoint=49℃; Freezing/Melting point=2 93.6℃; Vaporpressure=400 mmHg at 31℃; Relative vapor density (air-5 1)=2.42: Flash point=37.2℃; Autoignitiontemperature=361℃. Explosive limits in air: LEL=1.1%;UEL=8.7%. Hazard Identification (based on NFPA-704 MRating System): Health 1, Flammability 3, Reactivity 0.Insoluble in water
Cyclopentane is a colourless flammable acyclic hydrocarbon liquid with a petrol-like smell. It is a widely used component in preparing products like analgesics, insecticides, sedatives, antitumor agents and also finds application in pharmaceutical industry.
Application of Cyclopentane
Cyclopentane is a petroleum product. Itis formed from high-temperature catalyticcracking of cyclohexane or by reduction ofcyclopentadiene. It occurs in petroleum etherfractions and in many commercial solvents.It is used as a solvent for paint, in extractionsof wax and fat, and in the shoe industry.
As a laboratory reagent; in the manufacture of pharmaceuticals; found in solvents and in petroleum ether; propellant pressurizing agent.
Cyclopentane is used as green blowing agent and involved in the production of polyurethane insulating foam, which is used in refrigerators, freezers, water heaters, construction panels, insulated pipes and roofs. As a lubricant, it finds applications in computer hard drives and outer space equipment due to its low volatile nature. It is widely useful in the preparation of resin, adhesives and pharmaceutical intermediate. It is an additive in gasoline. Since it is a halogen free compound and has zero-ozone. depletion potential, it replaces the conventionally used chloro fluoro carbon (CFC) in refrigeration and thermal insulation.
| Cyclopentane Chemical Properties |
| Melting point | -94 °C (lit.) |
| Boiling point | 50 °C (lit.) |
| density | 0.751 g/mL at 25 °C (lit.) |
| vapor density | ~2 (vs air) |
| vapor pressure | 18.93 psi ( 55 °C) |
| refractive index | n |
| Fp | −35 °F |
| storage temp. | Store below +30°C. |
| solubility | 0.156g/l insoluble |
| form | Powder |
| color | White |
| Odor | Like gasoline; mild, sweet. |
| explosive limit | 1.5-8.7%(V) |
| Water Solubility | Miscible with ethanol, ether and acetone. Slightly miscible with water. |
| Thermal Conductivity | 0.117 W/(m·K) at 25 ℃ |
| λmax | λ: 198 nm Amax: 1.0 λ: 210 nm Amax: 0.50 λ: 220 nm Amax: 0.10 λ: 240-400 nm Amax: 0.01 |
| Merck | 14,2741 |
| BRN | 1900195 |
| Henry's Law Constant | 0.164, 0.240, and 0.300 at 27.9, 35.8, and 45.0 °C, respectively (dynamic headspace, Hansen et al., 1995) |
| Dielectric constant | 1.9（20℃） |
| Exposure limits | TLV-TWA 600 ppm (～1720 mg/m3) (ACGIH). |
| Stability: | Stable. Highly flammable. Note low flash point and wide explosion limits. Incompatible with strong oxidizing agents. Floats on water, so water is of limited value in putting out fires involving this material. |
| Major Application | environmental |
| InChI | 1S/C5H10/c1-2-4-5-3-1/h1-5H2 |
| InChIKey | RGSFGYAAUTVSQA-UHFFFAOYSA-N |
| SMILES | C1CCCC1 |
| LogP | 3 at 20℃ |
| CAS DataBase Reference | 287-92-3(CAS DataBase Reference) |
| NIST Chemistry Reference | Cyclopentane(287-92-3) |
| EPA Substance Registry System | Cyclopentane (287-92-3) |
| Safety Information |
| Hazard Codes | F |
| Risk Statements | 11-52/53 |
| Safety Statements | 9-16-29-33-61 |
| OEB | A |
| OEL | TWA: 600 ppm (1720 mg/m3) |
| RIDADR | UN 1146 |
| WGK Germany | 1 |
| RTECS | GY2390000 |
| Autoignition Temperature | 682 °F |
| TSCA | TSCA listed |
| HS Code | 2902 19 00 |
| HazardClass | 3 |
| PackingGroup | II |
| Storage Class | 3 - Flammable liquids |
| Hazard Classifications | Aquatic Chronic 3 Asp. Tox. 1 Flam. Liq. 2 STOT SE 3 |
| Hazardous Substances Data | 287-92-3(Hazardous Substances Data) |
| Toxicity | LC (2 hr in air) in mice: 110 mg/l (Lazarew) |
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