4-Pentenoic anhydride
4-Pentenoic anhydride (CAS 63521-92-6) is a carboxylic acid anhydride with the linear formula (H₂C=CHCH₂CH₂CO)₂O and a molecular weight of 182.22 g/mol. This compound functions as a valuable building block in organic synthesis. It is utilised in chemical processes requiring the introduction of the pentenoyl moiety. Tech Serve Solutions supplies this reagent for laboratory and industrial research applications.

Organic Synthesis Intermediate
4-Pentenoic anhydride serves as a reactive intermediate in organic chemistry. Its anhydride functionality allows for acylation reactions, enabling the formation of new carbon-carbon or carbon-heteroatom bonds.
Polymer Chemistry Research
The presence of a terminal alkene in 4-pentenoic anhydride suggests potential applications in polymer science. It could be explored as a monomer or co-monomer in the synthesis of functionalised polymers.
Pharmaceutical Intermediate Development
As a functionalised building block, 4-pentenoic anhydride may find use in the multi-step synthesis of complex pharmaceutical compounds. Its structure offers a platform for further chemical modification.
| Molecular weight | 182.22 |
|---|---|
| Linear formula | (H2C=CHCH2CH2CO)2O |
| Assay | 98% |
| Boiling point | 78-81 °C/0.4 mmHg(lit.) |
| Density | 0.997 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.447(lit.) |

Hazard statements
- H315Causes skin irritation
- H319Causes serious eye irritation
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P305IF IN EYES
| Protective equipment | Eyeshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 110 °C / 230 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xi |
| Risk statements (R) | 36/37/38 |
| Safety statements (S) | 26-36 |
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-Pentenoic anhydride used for?
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4-Pentenoic anhydride is primarily used as a building block and intermediate in organic synthesis, including in the development of pharmaceutical compounds and potentially in polymer chemistry research.
What are the CAS number and formula for 4-Pentenoic anhydride?
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The CAS number for 4-Pentenoic anhydride is 63521-92-6, and its linear formula is (H₂C=CHCH₂CH₂CO)₂O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4-Pentenoic anhydride with a minimum purity of 98%. This product is intended for laboratory and research purposes; TSS does not represent it as USP, BP, or EP grade.
How should 4-Pentenoic anhydride be handled safely?
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4-Pentenoic anhydride is classified as a Warning (GHS07) with hazards H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation). Handle with appropriate personal protective equipment, including eyeshields and gloves, and ensure adequate ventilation or use a suitable respirator.
How is 4-Pentenoic anhydride packed and shipped?
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4-Pentenoic anhydride is carefully packed to ensure stability during transit and is exported globally by Tech Serve Solutions following all relevant shipping regulations.
How can I request a sample or quote for 4-Pentenoic anhydride?
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To request a sample or a quote for 4-Pentenoic anhydride, please contact the Tech Serve Solutions sales team through our website or by phone, referencing the product CAS number 63521-92-6.
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