4-Cyclopentene-1,3-dione
4-Cyclopentene-1,3-dione (CAS: 930-60-9) is a cyclic diketone with the molecular formula C5H4(=O)2 and a molar mass of 96.08 g/mol. This organic building block serves as a valuable reagent in chemical synthesis. It has been employed in the preparation of complex organic molecules and in studies investigating protein interactions, demonstrating its utility in various research and development applications within organic chemistry and biochemistry.
- Synonyms
- C5H4(=O)2

Synthesis of Organic Compounds
4-Cyclopentene-1,3-dione is utilised as a precursor in the synthesis of various organic molecules. It has been used in the preparation of derivatives such as 2-methoxymethylene-4-cyclopentene-1,3-dione and chrysotrione B, highlighting its role in creating functionalised cyclic compounds.
Biochemical Research
This compound has been instrumental in biochemical investigations. Specifically, it was used to study the impact of sulfhydryl group-specific reagents on the activity of bovine heart phospholipid exchange protein, contributing to a better understanding of protein function and reactivity.
Chemical Building Block
As a versatile building block, 4-Cyclopentene-1,3-dione is part of the C3 to C6 carbonyl compounds and ketones categories. Its structure makes it suitable for further chemical modifications and incorporation into larger molecular architectures in synthetic chemistry.
| Molecular weight | 96.08 |
|---|---|
| Linear formula | C5H4(=O)2 |
| Assay | 95% |
| Boiling point | 60 °C/1 mmHg(lit.) |
| Storage temperature | 2-8°C |
| Application | 4-Cyclopentene-1,3-dione was used in the synthesis of 2-methoxymethylene-4-cyclopentene-1,3-dione1 and chrysotrione B (2-acylcyclopentene-1,3-dione derivative)2. It was used to investigate the influence of sulfiydryl group-specific reagents on activity of bovine heart phospholipid exchange protein3. |
| Melting point | 34-36 °C(lit.) |

Hazard statements
- H302Harmful if swallowed
- H317May cause an allergic skin reaction
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
| Protective equipment | dust mask type N95 (US), Eyeshields, Faceshields, Gloves |
|---|---|
| Flash point | 84 °C / 183.2 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 22-43 |
| Safety statements (S) | 36/37 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4-Cyclopentene-1,3-dione used for?
+
4-Cyclopentene-1,3-dione is used in chemical synthesis, particularly for creating organic compounds like 2-methoxymethylene-4-cyclopentene-1,3-dione and chrysotrione B. It is also employed in biochemical research to study protein interactions.
What are the CAS number and formula for 4-Cyclopentene-1,3-dione?
+
The CAS number for 4-Cyclopentene-1,3-dione is 930-60-9, and its linear formula is C5H4(=O)2.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies 4-Cyclopentene-1,3-dione with an assay of 95%. This product is supplied for research and laboratory use. Tech Serve Solutions does not represent this product as USP, BP, EP, or other pharmacopoeial grades.
How should 4-Cyclopentene-1,3-dione be handled safely?
+
4-Cyclopentene-1,3-dione is classified as harmful if swallowed (H302) and may cause an allergic skin reaction (H317). When handling, it is recommended to wear protective equipment including a dust mask (type N95 US recommended), eyeshields, face shields, and gloves. Ensure adequate ventilation.
Is 4-Cyclopentene-1,3-dione available for export?
+
Yes, Tech Serve Solutions is a specialist global supplier and exporter of fine chemicals, and 4-Cyclopentene-1,3-dione can be packed, shipped, and exported worldwide.
How can I request a quote or sample for 4-Cyclopentene-1,3-dione?
+
To request a quote or sample of 4-Cyclopentene-1,3-dione, please contact our sales team through the website or by phone. Our team will be happy to assist you with your inquiry.
▶ Related products

1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis

1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more

3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis

3-Methyl-1,5-pentanediol
Chemical Synthesis

3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis