L-Homocystine

Name: L-Homocystine
Brand: ChemScene
Availability: InStock
Rating: 5 (1 reviews)

CAS No. 626-72-2
Cat. No. CS-W012406
Purity≥95%
MDL No.MFCD00020391

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HazMat Fee

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, except in the following scenarios:

The shipment is processed through FedEx Ground under the Limited Quantity option.

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 626-72-2

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Description

L-Homocystine features a disulfide-bridged cysteine dimer with a unique α,ω-diamino acid backbone, enabling selective bioconjugation and protein crosslinking. This bench-stable, moisture-tolerant reagent integrates readily into peptide synthesis workflows, offering reliable sulfur-directed functionalization in chemical biology applications.

Application

L-Homocystine serves as a key sulfur-containing amino acid building block for the synthesis of biologically relevant thiol-containing peptides and thioether-linked scaffolds. Its disulfide functionality enables controlled redox chemistry in peptide conjugation and protein engineering workflows. The compound exhibits sufficient bench stability for routine handling and facilitates efficient incorporation into complex molecular architectures via standard coupling protocols.

General Information

CAS No. 626-72-2
Cat. No. CS-W012406
Purity ≥95%
MDL No. MFCD00020391
Storage 4°C
Shipping Room temperature in continental US; may vary elsewhere.
Molecular Formula C₈H₁₆N₂O₄S₂
Molecular Weight 268.35
Synonym(s) None
SMILES OC([C@@H](N)CCSSCC[C@H](N)C(O)=O)=O

Computational Chemistry Data

TPSA 126.64
LogP -0.0282
H_Acceptors 6
H_Donors 4
Rotatable_Bonds 9

Safety Information

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GHS Pictogram : N/A	GHS No : N/A
Signal Word : N/A	UN#: N/A
Class : N/A	Packing Group : N/A
Hazard Statements : N/A
Precautionary Statements : N/A

Quality Control

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Other Classifications

Bioactive Molecules Natural Products

Life Science Amino Acids and their Derivatives Cysteine and derivatives

Chemical Biology Peptide Chemistry Unnatural Amino Acid Derivatives

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L-Homocystine

CAS No. 626-72-2

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