A: When we state a purity level, like >98%, it means that at least 98% of the material in your vial is the exact peptide you ordered. We measure this using High-Performance Liquid Chromatography (HPLC), the industry-standard method. The Certificate of Analysis (CoA) we provide shows the actual chromatogram—a visual graph that proves the purity claim.

A: Every batch gets its own CoA, which is like a peptide’s “birth certificate.” It includes:

• Measured Purity: The actual HPLC result (e.g., 98.7%).

• Mass Confirmation: Mass Spectrometry (MS) data proving the molecular weight matches your exact sequence.

• Batch Number & Date: For complete traceability.

• Physical Appearance & Quantity: A description of the lyophilized powder and the net weight.

A: We use both, and they serve different, critical purposes. HPLC tells us how much of the target peptide is present (the purity percentage). Mass Spectrometry (MS) confirms what the peptide is by verifying its exact molecular weight, ensuring the sequence is correct. A complete quality check requires both.

A: You can order directly through our website or by contacting our sales team. For standard catalog peptides, our MOQ is typically 5mg. For custom synthesis, the MOQ can vary based on sequence complexity; we provide a clear minimum in your quote.

A: Yes, absolutely. We offer competitive wholesale pricing for larger quantities (typically 1 gram and above) and have loyalty benefits for repeat customers. Please contact our sales team at sales@chinesepeptidecompany.uk for a personalized bulk quote.

A: We accept major credit cards and bank wire transfers. All online card payments are processed through secure, PCI-compliant gateways. For larger orders, a bank transfer is often preferred.

A: It’s a collaborative process:

1. You send us your sequence and requirements (purity, quantity, modifications).

2. We provide a detailed quote and project timeline.

3. Upon approval, our synthesis team produces and purifies the peptide.

4. Our QC lab analyzes it with HPLC/MS.

5. We ship the peptide along with its comprehensive CoA.

A: We routinely handle a wide range, including:

• Common: N-terminal acetylation, C-terminal amidation.

• Advanced: Phosphorylation, biotinylation, fluorescent dyes (FITC, Cy dyes), cyclization, and incorporation of non-natural amino acids.

• Conjugation: Conjugation to carrier proteins like KLH or BSA for antibody production.

A: A typical standard custom peptide (10-20 amino acids, >95% purity) takes about 3-4 weeks from order confirmation to shipment. More complex sequences or higher purity requirements may take 5-7 weeks. We always provide an estimated timeline with your quote.

A: To the USA, standard shipping takes 5-10 business days after dispatch. We also offer expedited 2-3 day service. For other countries, times vary; you will see estimated options at checkout. We ship globally from our facilities.

A: Shipping costs are calculated in real-time at checkout based on destination, weight, and service. For international orders outside the USA, you (the buyer) are responsible for any import duties, taxes, or customs clearance fees. We ensure all commercial invoices and paperwork are accurately prepared for smooth customs processing.

A: Peptides are sealed in sterile vials, protected with desiccant, and securely cushioned. They are shipped at ambient (room) temperature in discreet, durable packaging. Lyophilized peptides are stable for shipping this way.

A: Our peptides are sold for research and development purposes only in laboratory settings. They are intended for in-vitro (test tube) and preclinical research by qualified professionals. They are NOT for human or animal consumption, diagnostic use, or as food additives, drugs, or cosmetics.

A: Our standard peptides are synthesized for in-vitro research. For in-vivo (animal) studies, specific cGMP-grade synthesis with endotoxin testing and additional documentation is required. Please contact us to discuss your in-vivo project requirements before ordering.

A: Chinese Peptide Company operates as a licensed legal entity for the manufacture and export of research chemicals. We comply with all applicable regulations in our operating jurisdictions. It is the buyer’s responsibility to ensure the purchase and use of our products comply with all laws in their own country/state.