Fmoc-Asp(OtBu)-OH, ≥98%

Name: Fmoc-Asp(OtBu)-OH, ≥98%
Brand: Vaqora Chemicals
SKU: VQ-002241

About Fmoc-Asp(OtBu)-OH, ≥98%

Vaqora Chemicals supplies Fmoc-Asp(OtBu)-OH, a protected amino acid registered under CAS number 71989-14-5 with a typical assay of ≥98%. The compound has the formula C23H25NO6, corresponding to a molecular weight of 411.4 g/mol. Its systematic (IUPAC) name is 2-(9H-fluoren-9-ylmethoxycarbonylamino)-4-[(2-methylpropan-2-yl)oxy]-4-oxobutanoic acid. It is also known as Fmoc-L-aspartic acid 4-tert-butyl ester or Fmoc-DL-Asp(Otbu)-OH.

It is supplied as white to off-white powder or crystals. Literature values give a melting point of 148-150 °C (dec.). Recommended storage is at 2–8 °C, with the container kept tightly sealed. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

It is commonly used for solid-phase peptide synthesis (SPPS), peptide drug discovery and medicinal chemistry. Typical end-use sectors are academic and industrial research and diagnostics and biotechnology.

We offer Fmoc-Asp(OtBu)-OH in 1 g, 5 g, 25 g and 100 g packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

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

Industries

Specifications & identifiers

Chemical identifiers
Product name	Fmoc-Asp(OtBu)-OH, ≥98%
Catalogue No.	VQ-002241
CAS Number	71989-14-5
IUPAC name	2-(9H-fluoren-9-ylmethoxycarbonylamino)-4-[(2-methylpropan-2-yl)oxy]-4-oxobutanoic acid
Molecular formula	C₂₃H₂₅NO₆
Molecular weight	411.4 g/mol
Exact mass	411.1682
Purity / assay	≥98%
HSN code	29241900
InChIKey	FODJWPHPWBKDON-UHFFFAOYSA-N
SMILES	CC(C)(C)OC(=O)CC(C(=O)O)NC(=O)OCC1C2=CC=CC=C2C3=CC=CC=C13
PubChem CID	3085669

Physical properties
Physical form	Crystalline
Appearance	White to off-white powder or crystals
Melting point	148-150 °C (dec.)
LogP (XLogP3)	3.5
H-bond donors / acceptors	2 / 6
TPSA	102 Å²
Storage	2–8 °C
Synonyms	Fmoc-L-aspartic acid 4-tert-butyl ester, 4-tert-Butyl hydrogen N-((9H-fluoren-9-ylmethoxy)carbonyl)-L-aspartate, 4-tert-butyl hydrogen N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-aspartate, Fmoc-DL-Asp(Otbu)-OH, 4-(tert-butoxy)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-4-oxobutanoic acid, Fmoc-D-Asp(OBut)-OH, Fmoc-L-aspartic acid b-tert-butyl ester, FDD-1806-PI, N-Alpha-Fmoc-D-aspartic acid beta-t-butyl ester, N-Alpha-Fmoc-L-aspartic acid beta-t-butyl ester, 4-tert-butoxy-2-(9H-fluoren-9-ylmethoxycarbonylamino)-4-oxo-butanoic acid, N-alpha-(9-Fluorenylmethoxycarbonyl)-L-aspartic acid beta-t-butyl ester

Safety & hazard information (GHS)

Environmental hazard

Signal word: Warning

Hazard statements

H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary statements: P273, P391, 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

Other grades of CAS 71989-14-5

Cell Culture

Fmoc-Asp(OtBu)-OH, cell culture tested

CAS: 71989-14-5
Formula: C₂₃H₂₅NO₆
MW: 411.4 g/mol

VQ-046285

Frequently asked questions

What is the CAS number of Fmoc-Asp(OtBu)-OH, ≥98%?

The CAS Registry Number of Fmoc-Asp(OtBu)-OH, ≥98% is 71989-14-5. It is also known as Fmoc-L-aspartic acid 4-tert-butyl ester, 4-tert-Butyl hydrogen N-((9H-fluoren-9-ylmethoxy)carbonyl)-L-aspartate, 4-tert-butyl hydrogen N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-aspartate.

What is the molecular formula and molecular weight of Fmoc-Asp(OtBu)-OH, ≥98%?

Fmoc-Asp(OtBu)-OH, ≥98% has the molecular formula C23H25NO6 and a molecular weight of 411.4 g/mol. Its IUPAC name is 2-(9H-fluoren-9-ylmethoxycarbonylamino)-4-[(2-methylpropan-2-yl)oxy]-4-oxobutanoic acid.

Which grade and pack sizes of Fmoc-Asp(OtBu)-OH, ≥98% can I order?

We supply Fmoc-Asp(OtBu)-OH, ≥98% in (≥98%) grade, in 1 g, 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-Asp(OtBu)-OH, ≥98%?

Yes. Every lot of Fmoc-Asp(OtBu)-OH, ≥98% 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-Asp(OtBu)-OH, ≥98% be shipped internationally?

Yes. Fmoc-Asp(OtBu)-OH, ≥98% is classified as hazardous, 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.

How should Fmoc-Asp(OtBu)-OH, ≥98% be stored?

2–8 °C. Keep the container tightly closed and refer to the SDS for full handling guidance.