Mt-2 Peptide >99% Purity – HPLC Verified

Verifiable Analytical Specifications — Every vial of Mt-2 (CAS 121062-08-6) ships with a batch-specific certificate that names the HPLC conditions used to determine the stated purity, enabling your QC laboratory to replicate the analysis without guesswork.

Product Specification

Intended Use

Supplied as a raw material for research and manufacturing use. Not for human or veterinary use. Not a finished product.

Why Two Labs Report Different Purity on the Same Mt-2 Batch

The discrepancy almost always traces back to the analytical method, not the material itself.

When a receiving lab runs an isocratic HPLC method on a peptide whose certificate states purity by gradient elution, the resulting chromatogram resolves impurities differently. The peak integration boundaries shift, and the reported area percentage diverges from the supplier’s figure. This mismatch halts incoming inspection and triggers a dispute that can delay projects by weeks. [NEED_CITE: ICH Q2 guidelines on analytical method validation for peptide raw materials]

HPLC Conditions That Define the Purity Claim

The stated Mt-2 peptide purity HPLC analytical verification of >99% is established using reverse-phase chromatography with UV detection at 214 nm on a C18 column under gradient elution. Each batch certificate documents these exact conditions — including column type, mobile phase composition, gradient profile, and flow rate — so that a buyer’s analytical laboratory can reproduce the separation. Reference standards traceable to USP/EP norms are used for calibration, ensuring the detector response is anchored to a recognized benchmark rather than an internal estimate.

Molecular Weight and Identity Confirmation

Every production lot undergoes mass spectrometry to confirm that the observed molecular weight matches the theoretical value for Mt-2 (CAS 121062-08-6). This MS verification is recorded on the batch-specific certificate alongside the HPLC chromatogram. When a receiving QC team observes an unexpected retention time during their own analysis, the MS data provides an orthogonal identity check that resolves whether the deviation is chromatographic or material-related. [NEED_CITE: mass spectrometry confirmation protocols for synthetic peptide identity]

Interpreting the Specification Sheet for Downstream Work

The white lyophilized powder appearance is a visual checkpoint that correlates with proper storage and handling throughout the supply chain. Discoloration or visible clumping upon receipt may indicate moisture ingress or temperature excursion during transit, which can accelerate degradation pathways such as deamidation or oxidation. The 24-month shelf life is validated under sealed, light-protected storage at -20 °C; deviation from these conditions shortens the usable window. Reconstituted solutions retain stability for approximately one month at 4 °C and approximately six months when aliquoted and returned to -20 °C, which is why single-use aliquoting is recommended to eliminate freeze-thaw stress on the peptide backbone. The endotoxin specification — below detection limits — is relevant for laboratories conducting cell-based in vitro assays where endotoxin contamination would confound experimental results. Packaging in 5 mg, 10 mg, and 15 mg vials allows researchers to select quantities that minimize repeated opening and exposure of bulk stock.

What an Incomplete Certificate Costs Your Lab

A certificate that states a purity figure without naming the HPLC method creates ambiguity that your QC team cannot resolve internally. When the receiving analyst cannot replicate the supplier’s chromatographic conditions, the re-test yields a different number, and the batch is placed on hold pending investigation. This investigation consumes analyst time, reference standards, and column life, while the material sits unused. In regulated environments, the inability to demonstrate method traceability can trigger audit findings that extend beyond a single shipment. [NEED_CITE: regulatory expectations for analytical method documentation in raw material qualification]

Why Procurement Teams Source Mt-2 Here

Batch-specific certificates of analysis include the full HPLC chromatogram, MS spectrum, and named analytical methods for every lot of Mt-2 shipped, eliminating the guesswork that causes re-test failures. Custom synthesis to buyer-supplied sequences and modifications is available from the same production line, ensuring consistency when research-scale material transitions to larger quantities. Temperature-controlled packing with transit temperature records accompanies each dispatch, providing documented evidence of cold-chain integrity upon arrival. Import documentation is prepared according to destination-country requirements, reducing the risk of customs holds for international shipments. Technical support on specification interpretation, handling, and storage is provided post-delivery by analysts familiar with the chromatographic methods used during release testing. Retained samples from each batch are maintained to support any future discrepancy investigation or repeat-testing request.

Documentation & Traceability

• Batch-specific certificate stating the HPLC gradient method, column type, and UV wavelength used for this lot
• Mass spectrometry data confirming molecular weight against theoretical value for CAS 121062-08-6
• Analytical method summary enabling buyer QC to replicate purity determination without requesting additional information
• Endotoxin assay report documenting detection limits and test methodology applied
• Certificate of origin and HS code 29371290 documentation for customs clearance in destination markets
• Retained sample log linking each shipped vial to archived material for future reference testing

Storage, Handling & Shipping

• Store Mt-2 lyophilized powder at -20 °C in the original sealed container to maintain the 24-month shelf life
• Protect from light exposure during storage to prevent photo-degradation of the white lyophilized powder
• Aliquot reconstituted solutions into single-use volumes before freezing at -20 °C to avoid freeze-thaw damage
• Temperature-controlled packaging with transit logging is used for all shipments of this temperature-sensitive material
• Reconstituted solutions remain stable for approximately one month at 4 °C in sealed, light-protected containers
• Import documentation including certificate of origin and safety data sheet accompanies each international dispatch

Requesting a Specification Review

When inquiring about Mt-2 (CAS 121062-08-6), please specify the analytical method your QC laboratory uses for incoming peptide inspection so we can confirm method alignment before shipment. Indicate your preferred vial size from the available 5 mg, 10 mg, or 15 mg options and whether retained samples or additional method documentation are required for your qualification protocol. For international orders, share your destination country so that the appropriate import paperwork can be prepared in advance.

Frequently Asked Questions

Q: What analytical methods are used to determine Mt-2 purity and how are results calibrated?
A: Purity is determined by reverse-phase HPLC with UV detection at 214 nm using a C18 column and gradient elution. Calibration is performed against reference standards traceable to USP/EP norms. The complete method parameters — including mobile phase composition, gradient profile, and flow rate — are documented on every batch certificate so your laboratory can reproduce the analysis.

Q: How does the batch-specific COA correspond to the vial received, and what raw data files are available?
A: Each vial is labeled with a batch number that matches the certificate of analysis enclosed with the shipment. The COA includes the HPLC chromatogram, MS spectrum, and endotoxin assay result for that specific lot. Raw data files or additional chromatographic documentation can be provided upon request to support your incoming material review.

Q: What support is provided if the buyer’s QC re-test result does not match the COA?
A: When a discrepancy arises, we first compare the buyer’s HPLC method parameters with those documented on the COA, as method differences are the most common cause of purity variation. Retained samples from the shipped batch are available for parallel re-testing. Our technical team provides method alignment guidance to resolve integration or condition differences.

Q: What are the recommended storage conditions and how is shelf life validated?
A: The lyophilized powder should be stored sealed and light-protected at -20 °C, where the 24-month shelf life has been established. Reconstituted solutions are stable for approximately one month at 4 °C or approximately six months when aliquoted and stored at -20 °C. Repeated freeze-thaw cycles should be avoided to prevent peptide degradation.

Q: What import documentation and customs paperwork accompany each shipment?
A: Each international shipment includes a certificate of origin, safety data sheet, batch-specific COA, and customs documentation aligned with HS code 29371290. Destination-specific import paperwork is prepared based on the receiving country’s requirements to minimize the risk of customs delays or shipment holds.