What purity levels do Evo Amino compounds meet?
Every compound in the Evo Amino catalog is manufactured to meet or exceed ≥99% purity as verified by reverse-phase High-Performance Liquid Chromatography with UV detection at 214 nm — the standard wavelength for peptide bond detection. The actual purity percentage is documented on the batch-specific Certificate of Analysis shipped with every order. This isn't a stated specification — it's a measured result. Batches that fail to reach the 99% threshold are rejected before they leave the facility. Published research has demonstrated that peptide purity directly affects experimental reproducibility, with trace impurities capable of interfering with receptor binding assays and cellular uptake studies (PMID: 19549937). Our commitment to documented purity standards ensures researchers receive compounds suited to sensitive analytical and biological applications.
How are compounds verified for purity and identity?
Compound verification at Evo Amino employs a multi-method analytical approach. Reverse-phase HPLC provides quantitative purity assessment by separating compounds based on hydrophobicity and measuring individual peak areas. LC-MS confirms molecular identity through mass-to-charge ratio measurement and electrospray ionization. For compounds intended for cell culture research, Limulus Amebocyte Lysate (LAL) endotoxin testing ensures bacterial contamination levels are within acceptable limits. Each method serves a distinct purpose: HPLC quantifies purity, LC-MS confirms identity, LAL validates bioburden. The combined dataset provides complete compound characterization aligned with published methodologies for research peptide quality assessment (PMID: 19549937, PMID: 25342275). All three results are compiled into the Certificate of Analysis for full batch traceability.
What is HPLC verification and why does it matter?
High-Performance Liquid Chromatography is an analytical technique that separates compounds in a mixture based on their interaction with a stationary and mobile phase. For peptide verification, reverse-phase HPLC is employed — peptides are separated by hydrophobicity through a column packed with hydrophobic silica particles, then eluted at different rates depending on their affinity for the stationary phase. A UV detector at 214 nm monitors peptide bond absorbance, generating a chromatogram where peaks represent distinct compounds. Purity is calculated as the target peptide peak area divided by total peak area and expressed as a percentage. This technique provides quantitative, reproducible purity data and represents the gold standard for peptide purity assessment in both industrial and academic research settings (PMID: 19549937). The actual HPLC chromatogram accompanies every Evo Amino Certificate of Analysis — not a summary, the actual data.
How should research peptides be stored?
Lyophilized peptides should be stored at -20°C in a frost-free freezer to maintain stability over extended periods. The lyophilized format provides maximum protection — peptide bonds are shielded from hydrolysis and oxidation that would occur in solution. Light-sensitive compounds, particularly those containing tryptophan or tyrosine residues, require protection from direct light exposure via opaque containers or dark storage conditions. Vials should remain sealed until the point of research use to prevent moisture absorption. Published research indicates that lyophilized peptides stored at -20°C maintain stability for 24 months or longer under proper handling conditions (PMID: 15283699). Minimize temperature cycling — repeated warming and re-freezing promotes aggregation and degradation. For extended storage of working solutions, aliquoting into single-use volumes prevents repeated temperature excursions. Each compound's specific storage requirements are specified on the product label and Certificate of Analysis.
How do I read a Certificate of Analysis?
A Certificate of Analysis documents the analytical test record for a specific production batch. Key sections: batch number (the unique identifier linking every vial to its analytical data), test date, methods used, and numerical results with acceptance criteria. For peptide compounds, the CoA lists HPLC purity as a percentage — values at or above 99% meet the Evo Amino specification. Mass spectrometry results confirm molecular identity, with observed molecular weight compared against theoretical values within instrument tolerance (typically ±1 Da). Endotoxin results are expressed in EU/mg or EU/vial; lower values indicate less bacterial contamination. Each result includes the acceptance criteria used — if a result fell outside specification, the batch would not have been released. CoA documentation is signed by quality personnel, indicating the batch passed all specifications. Retain CoAs with laboratory records and experimental notebooks — journals increasingly require analytical characterization of research compounds in supplementary materials.
Does Evo Amino offer bulk or institutional pricing?
Evo Amino offers bulk and institutional pricing for qualified research organizations requiring larger quantities or ongoing procurement. Bulk pricing applies to orders exceeding standard catalog quantities — multiple vials of the same compound or gram-scale requirements. Institutional pricing is available for universities, research institutes, and biotechnology companies with recurring compound needs. To request a quote, submit an inquiry through the bulk orders page with the compound name, desired quantity, and intended research context. Our team reviews requests and provides custom quotations based on current availability and synthesis schedules. Bulk orders may require extended lead times depending on analytical testing queues. All bulk shipments include the same ≥99% purity verification, batch-specific CoA documentation, and cold-chain packaging as standard orders. Institutional accounts may be eligible for additional services including dedicated account management and priority processing.
What shipping methods are available?
Evo Amino ships via expedited service with temperature-controlled packaging on every order — cold-chain is not an upgrade, it's standard. All peptide orders are shipped in insulated packaging with refrigerant gel packs maintaining appropriate temperature ranges for the duration of transit. Temperature indicators are included so researchers can verify thermal integrity upon arrival. Domestic US orders typically arrive within 1–3 business days, with orders processed within 1–2 business days. Tracking information is provided upon shipment. Inspect packages immediately upon delivery — if temperature indicators show exposure outside the acceptable range, contact support promptly. International shipping is available to select countries; customers are responsible for import compliance and applicable duties or taxes. Shipping costs are calculated at checkout based on destination and package weight.
What is your refund policy for research compounds?
Evo Amino accepts returns and provides remediation under specific conditions outlined in our refund policy. Compounds may be returned if they arrive damaged, fail to meet stated specifications, or if there is a shipping or fulfillment error. Quality-related returns require photographic documentation of the issue and the Certificate of Analysis for review. Returns must be initiated within 14 days of delivery. Compounds removed from original packaging or opened vials are not eligible for return due to contamination risk and compound integrity concerns. Refunds are processed to the original payment method within 5–7 business days of confirmed return receipt. For domestic returns, prepaid shipping labels are provided where applicable. Temperature-sensitive compounds compromised during transit require documentation of temperature indicator status and packaging condition. Contact the research support team to initiate a return or discuss any concerns with a received order.
How are compounds packaged for stability?
Research compounds are packaged to maximize stability across both storage and transit. Lyophilized peptides are sealed in amber glass vials under nitrogen atmosphere to prevent oxidation and moisture absorption. Vials are fitted with rubber septa secured with aluminum crimp seals — providing a hermetic barrier to environmental contaminants while maintaining laboratory-grade integrity for handling. Amber glass protects light-sensitive compounds from photodegradation. Individual vials are cushioned in cardboard boxes to prevent breakage during shipping. Temperature-sensitive shipments are packed in insulated containers with refrigerant gel packs calibrated for appropriate transit duration. Temperature indicators are included in every shipment. Outer shipping boxes carry handling instructions and orientation markers. This multi-layer approach addresses every vector of compound degradation: light, moisture, temperature fluctuation, and physical impact — from synthesis through delivery.
What are the differences between peptide categories?
Peptide categories reflect primary research applications and documented molecular mechanisms. Metabolic compounds include GLP-1 analogs and mitochondrial-derived peptides studied for glucose regulation and energy metabolism research (PMID: 30215696). Healing compounds encompass cytoprotective peptides and tissue repair factors investigated for extracellular matrix interactions (PMID: 35489163). Cognitive compounds comprise neuromodulatory peptides and neurotrophic factors studied for synaptic plasticity mechanisms (PMID: 16445185). GH Secretagogues are growth hormone-releasing analogs characterized for pituitary receptor binding studies (PMID: 15775957). Longevity compounds include telomerase activators and mitochondrial-targeted peptides investigated for cellular senescence pathways (PMID: 19619679). These classifications are based on published preclinical literature, not therapeutic indications. Individual compounds may exhibit overlapping activities across categories due to complex receptor interaction profiles documented in preclinical studies.
Why does Evo Amino cite PMIDs on product pages?
PubMed Identifier citations provide traceable links to peer-reviewed literature for every molecular claim on our product pages. This is the standard in academic research — every claim requires a citation. PMIDs link directly to the NCBI PubMed database, allowing researchers to independently verify the studies we reference. Each PMID represents a published, peer-reviewed article that has undergone scientific scrutiny. Citing primary literature instead of derivative marketing language aligns Evo Amino with how researchers actually evaluate information. Cited studies document molecular mechanisms, receptor binding affinities, and cellular effects in preclinical models — the science behind each compound, traceable to its source. All PMIDs are flagged pending human verification before final publication to ensure accuracy. This is what responsible scientific documentation looks like.
