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This section provides an overview for cyclopentene as well as their applications and principles. Also, please take a look at the list of 9 cyclopentene manufacturers and their company rankings. Here are the top-ranked cyclopentene companies as of December, 2024: 1.Junsei Chemical Co.,Ltd., 2.KANTO CHEMICAL CO.,INC., 3.Merck.
Table of Contents
Cyclopentene is an organic compound, a cycloalkene with the chemical formula C5H8, known for its presence as an impurity in gasoline, typically in concentrations of 1% or less. Its CAS registration number is 142-29-0.
Primarily used in chemical synthesis, cyclopentene acts as a starting monomer for producing various plastics and rubber materials, including cyclopentene rubber through ring-opening metathesis polymerization. It's also a precursor for neplanocin A, a compound with noted anticancer and antiviral properties.
Figure 1. Basic Information on Cyclopentene
Cyclopentene is a colorless liquid at room temperature with a pungent, mildly sweet odor, boasting a molecular weight of 68.11, and exhibiting a boiling point of 44°C. It is soluble in common organic solvents like ethanol and benzene, highly flammable with a flash point of -29°C, and has a spontaneous combustion temperature of 395°C.
Available for both research and industrial applications, cyclopentene is sold in various volumes for R&D, commonly refrigerated, and in larger quantities like 130 kg drums for industrial use, particularly as a monomer.
Figure 2. Synthesis of Cyclopentene
The synthesis of cyclopentene includes methods like the pyrolysis of naphtha and catalytic hydrogenation of cyclopentadiene. Important chemical reactions involving cyclopentene include polymerization using Ziegler-Natta catalysts and hydrocarboxylation with palladium catalysts to produce cyclopentanecarboxylic acid.
Figure 3. Hydrocarboxylation reaction of Cyclopentene
When cyclopentene is polymerized using a Ziegler-Natta catalyst, the 1,3-polymerization reaction is known to occur. Hydrocarboxylation of cyclopentene with palladium catalyst yields cyclopentanecarboxylic acid.
Cyclopentene, as mentioned above, is a highly flammable substance and is designated by the GHS classification as follows
Keep away from ignition sources such as heat, sparks, open flames, and high temperatures. When handling, it is also important to wear appropriate personal protective equipment such as protective gloves, safety glasses, and protective masks, and to provide an appropriate environment by using explosion-proof electrical equipment, ventilation equipment, and lighting equipment.
Tools that do not generate sparks should be used, and precautions against electrostatic discharge should be taken. The product must be stored in a well-ventilated area and kept in a cool place.
Cyclopentene is a regulated compound by law due to the hazards mentioned above. It must be handled properly in compliance with laws and regulations.
*Including some distributors, etc.
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Kanto Chemical Co. Inc., founded in 1944 and headquartered in Tokyo, Japan, is a reagent manufacturer with overseas affiliates in other countries, including China, France, USA, Taiwan, and Malaysia. Its product portfolio includes analytical reagents, ionic liquids, Iodine compounds, ultra-pure chemicals, and water analysis kits. The company is also developing regenerative medicine and genetics reagents and has over 50,000 products. It has several certifications, including ISO 9001, acquired in 1994, making it the first Japanese company in the reagent industry. Other certifications are ISO 14001, ISO 13485, and ISO/IEC 17025.
Junsei Chemical Co. Ltd., established in 1948 and headquartered in Tokyo, Japan, is a manufacturer of chemical reagents and chemical products, including commissioned synthesis of chemical products. Some of the products it makes include Sodium chloride solution, concentrated glycerin, calcium chloride, ascorbic acid, and nitric acid. The chemical products have a wide range of applications and can be used in pathological examination, as food additives, for analysis, and in the pharmaceutical industry. All its plants, including its research institute, are ISO4001 and ISO9001 certified, while its Saitama and Ibaraki plants are equipped with buildings that comply with GMP.
Merck, started in 1668 and based in Darmstadt, Germany, is a supplier of solutions and services for research, development, and manufacture of pharmaceutical and biotechnological drug therapies. The company serves the life science industry and has a broad portfolio of 300,000 products, including biopharmaceutical manufacturing, industrial microbiology, reagent, life science research, and water purification products. It is available in 66 countries, brings together six brands, and has several ISO certifications, including ISO 13485, ISO 14001, ISO 13485, and ISO 50001.
Henan Tianfu Chemical Co., Ltd., founded in 2009, is a Chinese chemical manufacturer and supplier based in Zhengzhou, Henan. The company has developed over 500 compounds, mostly for fine applications in manufacturing and life science. Their product range includes electronic chemicals, ultraviolet (UV)-curing materials, ionic liquids, and pharmaceutical materials. Additionally, Henan Tianfu has expanded into the fine chemical market, offering noble metal catalysts, organic phosphine ligands, and organic light-emitting diode (OLED) intermediates. They are also involved in the development of pesticides and medical intermediates, as well as the analysis and synthesis of electronic chemical materials.
Jigs Chemical was established in 1998 and is based in India with global offices in the USA, UK, Canada, and Australia. Jigs Chemical is a manufacturer, distributor, and marketing & sales provider for organizations in India, specializing in chemicals and active pharmaceutical ingredients for pharmaceutical, agriculture, ceramics, metal treatment, and other industries. Jigs Chemical helps facilitate international customers to obtain chemicals from India, providing import and export assistance. Jigs Chemical’s product catalog includes over 40000 active pharmaceutical ingredients, commonly called APIs, their respective intermediates, and other chemicals.
National Analytical Corporation (NAC) is located in Mumbai, India. NAC was founded in 2009 as a distributor of laboratory grade chemicals used in numerous industries. NAC’s chemical offerings include biochemical & reagents such s Prunetin and 1,2-dipalmitoly-rac-glycerol, analytical grade chemicals such as chicoric acid and Vitamin E solutions, laboratory chemicals such as formic acid and nitric acid, gas chromatography chemicals such as Aalborg mass flowmeter battery kits and DEX 225, reference standard chemicals such as Palladium in HNO3, oral solid dosage forms, such as cellulosic and protect film coating systems, parenteral dosage forms, beverage & nutrition, and coating chemicals.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Junsei Chemical Co.,Ltd. |
38.9%
|
| 2 | KANTO CHEMICAL CO.,INC. |
16.7%
|
| 3 | Merck |
16.7%
|
| 4 | SEQENS |
11.1%
|
| 5 | NATIONAL ANALYTICAL CORPORATION |
11.1%
|
| 6 | Henan Tianfu Chemical Co.,Ltd |
5.6%
|
Derivation Method
The ranking is calculated based on the click share within the cyclopentene page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
Japan
|
2 | 40.0% |
China
|
2 | 40.0% |
|
India
|
1 | 20.0% |
