Guide
Peptide Stability & Handling
Understanding the chemical and physical factors that affect peptide research compound stability.
Lyophilized vs. Solution Form
Research peptides are typically supplied in lyophilized (freeze-dried) powder form, which offers superior stability compared to aqueous solutions. Lyophilized peptides maintain their analytical integrity for extended periods when stored under appropriate conditions. Solution stability varies by compound and is generally shorter.
Key Stability Factors
Peptide stability in laboratory settings is influenced by: temperature (lower = more stable), moisture exposure, pH (for solutions), UV light exposure, and oxidative conditions. Research compounds should be handled in controlled laboratory environments following standard protocols.
Analytical Integrity Preservation
To preserve analytical integrity, research peptides should be minimized in their exposure to freeze-thaw cycling, stored in appropriately sized aliquots to reduce repeated access, and handled according to the specific compound's Certificate of Analysis specifications.
Guide
Understanding COAs
How to read and interpret Certificates of Analysis for research-grade peptide compounds.
What is a COA?
A Certificate of Analysis (COA) is an official document issued by a quality assurance department or analytical laboratory that confirms a product meets its specified analytical requirements. For research peptides, a COA typically includes purity data, molecular weight confirmation, lot number, and testing methodology.
HPLC Purity Data
HPLC (High-Performance Liquid Chromatography) purity data shows the percentage of the main compound peak relative to all detected peaks. Research-grade peptides typically specify ≥95% or ≥98% purity. Higher purity values indicate fewer analytical impurities in the batch.
Mass Spectrometry Confirmation
ESI-MS (Electrospray Ionization Mass Spectrometry) confirms the molecular weight of the peptide, verifying sequence identity. A match between theoretical and observed molecular weight values confirms compound identity at the molecular level.
Guide
Research Use Only Guidelines
Compliance information and guidelines for laboratory researchers and institutions.
Who May Purchase Research Compounds
Products offered by AQRO Research are intended for purchase and use by qualified researchers, research institutions, universities, pharmaceutical companies, and other entities engaged in legitimate scientific research. Purchasers assume responsibility for compliance with all applicable laws.
Intended Use Limitations
All products are sold exclusively for in vitro research, preclinical investigation, and laboratory study. Products are not intended for human or veterinary therapeutic use, food, drug, or cosmetic applications. They are not approved by the FDA or any regulatory authority for human use.
Regulatory Compliance
Researchers are responsible for ensuring their use of research compounds complies with all applicable federal, state, and local regulations, including but not limited to DEA regulations, institutional review requirements, and laboratory safety standards. Consult your institution's compliance office.
Guide
Lab Storage Best Practices
Standard laboratory protocols for peptide compound storage, freezing, and preservation.
Temperature Guidelines
Lyophilized research peptides should be stored at −20°C or below for long-term preservation. Short-term storage (under one week) at 4°C may be acceptable for some compounds. Refer to the specific compound's COA for exact storage temperature specifications.
Aliquoting Protocols
To minimize freeze-thaw cycling, researchers should aliquot reconstituted peptides into single-use volumes prior to freezing. Single-use aliquots reduce repeated temperature cycling which can degrade analytical quality over time. Aliquots should be labeled with compound name, concentration, date, and researcher initials.
Container and Labeling
Research compounds should be stored in appropriate laboratory containers with clear chemical identification labeling per institutional and regulatory requirements. Proper labeling should include compound name, lot number, storage conditions, date received, and any relevant safety information from the SDS.
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