Fmoc-Asn-ONp
Fmoc-Asn-ONp (CAS: 71989-17-8), with the molecular formula C25H21N3O7 and a molecular weight of 475.45 g/mol, is a derivative of the amino acid asparagine. It is primarily utilised in peptide synthesis as a protected building block. This compound facilitates the controlled formation of peptide bonds, playing a crucial role in the research and development of novel peptides and proteins for various biochemical and pharmaceutical applications.
- IUPAC
- Fmoc-L-asparagine 4-nitrophenyl ester
- Synonyms
- Fmoc-L-asparagine 4-nitrophenyl ester

Peptide Synthesis
Fmoc-Asn-ONp serves as a key intermediate in solid-phase and solution-phase peptide synthesis. Its Fmoc protecting group allows for orthogonal deprotection strategies, enabling the sequential addition of amino acids to build complex peptide chains.
Biochemical Research
This reagent is employed in academic and industrial research settings for the synthesis of peptides with specific sequences. These synthetic peptides are often used to study protein function, enzyme activity, and cellular signalling pathways.
Pharmaceutical Development
As a building block in peptide chemistry, Fmoc-Asn-ONp contributes to the development of peptide-based therapeutics. Research into peptide drugs for various medical conditions benefits from reliable access to high-quality protected amino acid derivatives.
| Molecular weight | 475.45 |
|---|---|
| Empirical formula | C25H21N3O7 |
| Assay | ≥98.0% (calc. based on dry substance, C/N) |
| Grade | purum |
| Optical activity | [α]20/D −37±1°, c = 1% in DMF: AcOH (99:1) |
| Storage temperature | 2-8°C |
| Melting point | 184-188 °C |
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 Fmoc-Asn-ONp used for?
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Fmoc-Asn-ONp is primarily used as a protected amino acid derivative in peptide synthesis for biochemical research and pharmaceutical development.
What is the CAS number and molecular formula for Fmoc-Asn-ONp?
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The CAS number is 71989-17-8, and the molecular formula is C25H21N3O7.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Fmoc-Asn-ONp with a minimum assay of ≥98.0% (calculated based on dry substance, C/N) and a 'purum' grade. We do not represent this product as meeting USP, BP, or EP pharmacopoeia standards.
How should Fmoc-Asn-ONp be handled and stored?
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Fmoc-Asn-ONp requires storage at 2-8°C. Refer to the Safety Data Sheet (SDS) for detailed handling instructions and hazard information. Ensure appropriate personal protective equipment is used when handling this chemical.
Is Fmoc-Asn-ONp a controlled substance?
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Based on the provided data, there is no indication that Fmoc-Asn-ONp is a controlled substance.
How are chemicals like Fmoc-Asn-ONp packed and exported by TSS?
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Tech Serve Solutions packs and exports chemicals in compliance with all relevant international shipping regulations, ensuring product integrity and safety during transit.
How can I request a quote or sample for Fmoc-Asn-ONp?
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To request a quote or sample for Fmoc-Asn-ONp, please contact our sales team through the TSS website or via the provided contact details, specifying the product CAS number (71989-17-8).
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