H-Asp-OtBu

Name: H-Asp-OtBu
Brand: ChemScene
Availability: InStock
Rating: 5 (1 reviews)

CAS No. 4125-93-3
Cat. No. CS-W006400
Purity≥98%
MDL No.MFCD00171675

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Each bottle is packed as an Excepted Quantity, with a maximum of 1g for items in class 6.1 packing group I or II, and up to 25g for all other hazardous materials.

If shipping is charged to your FedEx account, the HazMat fee will be billed directly by the courier. Otherwise, the fee will be included on your invoice. To help you avoid the HazMat fee, we can package a 5g order of a class 6.1 packing group I or II material as five separate 1g units, and a 100g order of any other dangerous good as four 25g units. This packaging adjustment will be made unless you instruct otherwise on your purchase order. Below, you will find the fee schedule from FedEx for handling hazardous materials.

Type	HazMat Fee
Excepted Quantity	$0.00
FedEx Limited Quantities Ground	$0.00
Hazmat Ground shipping	$50.00+
Inaccessible (Haz class 6.1 or 9), Domestic	$68.00+
Accessible (Haz class 3, 4, 5 or 8), Domestic	$158.00+
Inaccessible (Haz class 6.1 or 9), International	$108.00+
Accessible (Haz class 3, 4, 5 or 8), International	$238.00+

An item is classified as a dangerous good if our website displays Hazardous Material (HazMat) information for it.

There is a HazMat shipping fee for each item that qualifies as a dangerous good. Please contact our quotation team via email to confirm the details.

*For research and further manufacturing use only, not for direct human use.

Structure of 4125-93-3

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Description

H-Asp-OtBu serves as a protected aspartic acid building block for peptide synthesis, featuring a tert-butyl ester that enables straightforward deprotection under mild acidic conditions. This stable, bench-ready derivative simplifies incorporation into oligopeptide chains while minimizing side reactions during coupling steps.

Application

H-Asp-OtBu serves as a key building block in peptide synthesis, offering a readily accessible source of protected aspartic acid for the construction of biologically relevant sequences. The OtBu (tert-butyl) ester group provides excellent stability under standard coupling conditions and facilitates straightforward deprotection via mild acid treatment. Its well-documented compatibility with common solid-phase and solution-phase protocols enables efficient incorporation into target peptides without side reactions.

General Information

CAS No. 4125-93-3
Cat. No. CS-W006400
Purity ≥98%
MDL No. MFCD00171675
Storage 4°C
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₈H₁₅NO₄
Molecular Weight 189.21
Synonym(s) None
SMILES OC(C[C@H](N)C(OC(C)(C)C)=O)=O

Computational Chemistry Data

TPSA 89.62
LogP 0.1301
H_Acceptors 4
H_Donors 2
Rotatable_Bonds 3

Safety Information

Download SDS

GHS Pictogram :	GHS No : GHS07
Signal Word : Warning	UN#: N/A
Class : N/A	Packing Group : N/A
Hazard Statements : H302-H315-H319-H335
Precautionary Statements : P261-P264-P270-P271-P280-P302+P352-P304+P340-P305+P351+P338-P330-P362+P364-P403+P233-P405-P501

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Other Classifications

Bioactive Molecules Peptides

Life Science Amino Acids and their Derivatives Aspartic acid and derivatives

Chemical Biology Peptide Chemistry Unnatural Amino Acid Derivatives

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H-Asp-OtBu

CAS No. 4125-93-3

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