Quality Assurance & Batch Testing

Quality Overview

The process of peptide quality assurance at Verified Peptides is not the last step in the chain of actions – it is integrated into each phase of supply.

The consistency of products is extremely important for researchers, as any compound, which has not been checked on purity or whose identity was not confirmed by molecular analysis, will bring uncontrollable variables into your experiments and data.

This is why every product in Verified Peptides catalogue goes through a documented multi-stage quality process before it is approved for supply. If a batch does not meet our quality specifications, it is not released for supply.

Here is exactly what that process looks like.

For research use only. Not for human or veterinary use.

Purity Standards – HPLC ≥98%

The starting point for our peptide quality assessment lies in HPLC – high-performance liquid chromatography.

What HPLC measures:

The purity of the compound concerning its overall chromatogram peak area
Any presence of impurities, degradation products, or contaminants in the compound
Whether the primary compound adheres to the required purity criterion

Our standards:

Minimum HPLC Purity ≥98% for each product in each batch.
Data reported and cited in the Certificate of Analysis
Any batch that does not meet the specified purity requirement is excluded from release.

Why this is important to your research:

HPLC purity testing helps researchers assess compound consistency before use in experimental settings.
Decreased purity provides you with unknown variables in your experiment

This is the minimum purity we accept. Many of our catalogue compounds are above this level and the information is available on the CoA.

For Research Use Only. Not for Human or Veterinary Use.

Batch Testing

Each batch of our laboratory standards peptides produced by Verified Peptides undergoes independent third-party testing, not just internal validation.

The procedure for batch testing is as follows:

Mass spectrometry analysis – to validate the molecular weight based on the theoretical mass and verify consistency with expected molecular specifications
Independent third-party laboratory testing – performed by accredited analytical labs outside Verified Peptides
Batch identification – each batch is identified by a unique batch code and undergoes its own testing, not a representative test of an entire batch
Traceability – batch documentation is kept on file and cited in the Certificate of Analysis provided with every shipment

We do not rely on manufacturer-provided data alone. Independent validation is a mandatory step in our peptide quality testing protocol.

Sterile Packaging

Peptide materials can be sensitive to environmental conditions during storage and transport. The way they are packaged is important for ensuring their integrity upon delivery.

Verified Peptides standards peptide packaging:

All lyophilized peptides are sealed under nitrogen gas to prevent oxidation
The packaging materials used are pharmaceutical-grade and non-reactive, helping minimise the risk of unwanted interactions that may affect compound stability.
Each peptide is individually packed with tamper-proof seals
The specifications of packaging used are detailed in the order confirmation

Verified Peptides does not use any generic or untested packaging materials. Everything that comes into contact with the compound is chosen with the specific purpose of maintaining the integrity of HPLC purity peptides.

For laboratory research purposes only. Do not use it for humans or animals.

Storage Conditions

Correct storage is essential in preserving the integrity and stability of peptides, once delivered to the laboratory.

General standard guidelines on how to store lyophilised peptides:

Store at -20°C in a dry controlled environment
Avoid repetitive freeze-thaw cycles
Always shield from light and moisture exposure
Refer to product-specific documentation for handling requirements within approved laboratory settings.

Shipping instructions:

Verified Peptides transports temperature sensitive products following proper cold chain protocols
Insulating material and temperature monitoring devices are utilised when needed
The storage conditions for each specific product are included in the certificate of analysis

This is only a guide for laboratory standardization in handling peptides. Each specific product has a different storage condition that is always listed in the CoA.

No reconstitution, dosage, or administration guidance is provided. For research use only. Not for human or veterinary use.

Documentation Process

Every order from Verified Peptides comes with a complete documentation trail – from batch testing through to delivery.

What you receive with every order:

Certificate of Analysis (CoA) – batch-specific, issued for every lot shipped, includes HPLC purity percentage, mass spectrometry data, lot number, batch date, expiry reference, independent laboratory reference, and storage specifications
Batch number – unique identifier for full traceability
Independent laboratory reference – name and accreditation details of the third-party testing facility
Packaging documentation – materials used and cold chain protocols applied

How to access your documentation:

CoA Documentation can be downloaded from your authorized account portal once the order has been confirmed.
Batch verification can be independently verified through the Verified Peptides CoA Verification Portal.
The documentation is intended to assist in meeting traceability requirements in GLP-compliant settings.

Verified Peptides provides an organized documentation process intended to meet QA/traceability requirements in research settings.

For Research Use Only. Not For Human or Veterinary Use.