Fmoc-L-aspargine, 99%

About Fmoc-L-aspargine, 99%

Fmoc-L-aspargine is a protected amino acid in Biochemistry grade carrying the CAS registry number 71989-16-7 with a typical assay of ≥99%. Formula C19H18N2O5, molecular weight 354.4 g/mol. The IUPAC name is (2S)-4-amino-2-(9H-fluoren-9-ylmethoxycarbonylamino)-4-oxobutanoic acid. Common synonyms include 9-Fluorenylmethoxycarbonyl chloride and 9-Fluorenylmethyl chloroformate.

The material typically appears as white to yellow powder or crystals. Literature values give a melting point of 175-190 °C. Keep the container tightly sealed and store it in a cool, dry area. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

Key uses span solid-phase peptide synthesis (SPPS), peptide drug discovery and medicinal chemistry. It is used across academic and industrial research and diagnostics and biotechnology.

Standard pack sizes are 5 g, 25 g, 100 g and 1 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Solid-phase peptide synthesis (SPPS)
Peptide drug discovery
Medicinal chemistry

Industries

Specifications & identifiers

Chemical identifiers
Product name	Fmoc-L-aspargine, 99%
Catalogue No.	VQ-002268
CAS Number	71989-16-7
IUPAC name	(2S)-4-amino-2-(9H-fluoren-9-ylmethoxycarbonylamino)-4-oxobutanoic acid
Molecular formula	C₁₉H₁₈N₂O₅
Molecular weight	354.4 g/mol
Exact mass	354.1216
Grade	Biochemistry
Purity / assay	≥99%
HSN code	29379020
InChIKey	YUGBZNJSGOBFOV-INIZCTEOSA-N
SMILES	C1=CC=C2C(=C1)C(C3=CC=CC=C32)COC(=O)N[C@@H](CC(=O)N)C(=O)O
PubChem CID	2724774

Physical properties
Physical form	Crystalline
Appearance	White to yellow powder or crystals
Melting point	175-190 °C
LogP (XLogP3)	1.5
H-bond donors / acceptors	3 / 5
TPSA	119 Å²
UN number	UN 3261
Synonyms	9-Fluorenylmethoxycarbonyl chloride, 9-Fluorenylmethyl chloroformate, Fmoc-Cl, Fmoc-L-asparagine, N-.alpha.-Fmoc-L-asparagine, L-Asparagine, N(2)-[(9H-fluoren-9-ylmethoxy)carbonyl]-, L-Asparagine, N(2)-((9H-fluoren-9-ylmethoxy)carbonyl)-, N-alpha-Fmoc-L-asparagine, Fmoc-Asn-OH, Fmoc-L-Asn-OH, Nalpha-Fmoc-L-asparagine, (2S)-3-carbamoyl-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)propanoic acid

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Fmoc-L-aspargine, 99%?

The CAS Registry Number of Fmoc-L-aspargine, 99% is 71989-16-7. It is also known as 9-Fluorenylmethoxycarbonyl chloride, 9-Fluorenylmethyl chloroformate, Fmoc-Cl.

What is the molecular formula and molecular weight of Fmoc-L-aspargine, 99%?

Fmoc-L-aspargine, 99% has the molecular formula C19H18N2O5 and a molecular weight of 354.4 g/mol. Its IUPAC name is (2S)-4-amino-2-(9H-fluoren-9-ylmethoxycarbonylamino)-4-oxobutanoic acid.

Which grade and pack sizes of Fmoc-L-aspargine, 99% can I order?

We supply Fmoc-L-aspargine, 99% in Biochemistry (≥99%) grade, in 5 g, 25 g, 100 g, 1 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Fmoc-L-aspargine, 99%?

Yes. Every lot of Fmoc-L-aspargine, 99% is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Fmoc-L-aspargine, 99% be shipped internationally?

Yes. Fmoc-L-aspargine, 99% is classified as hazardous (UN 3261), so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.