A research peptide shipment that clears customs smoothly and one that gets held for weeks usually differ in one place: the paperwork. Labs that receive international shipments regularly tend to request the same set of documents up front, and it's worth knowing what those are before an order ships rather than after it's stuck.
What Should Accompany a Shipment
A complete shipment package generally includes a commercial invoice with an accurate product description, the Certificate of Analysis for the specific lot, and clear labeling that the contents are for laboratory research use only. Vague invoice descriptions are one of the most common causes of customs delays — "chemical sample" invites scrutiny that "lyophilized research peptide, RUO, not for human use" tends to avoid.
Harmonized System (HS) Codes
Customs authorities classify shipments using HS codes, and peptides are typically classified under organic chemical compound headings rather than pharmaceutical codes, since RUO products aren't formulated or labeled as drugs. An incorrect HS code is a common reason a shipment gets flagged for manual review, so it's worth confirming the code used matches how the product is actually described and labeled.
What the Receiving Institution Should Keep on File
Most institutional biosafety or procurement offices want a record trail that ties each shipment to an internal purchase or project reference, independent of what customs requires. Keeping the invoice, COA, and any import clearance paperwork together by lot number makes that internal audit trail straightforward, and it's the same lot number that should appear on the vial label itself.
Common Friction Points
- Invoice description doesn't match the product label or COA
- Missing or inconsistent RUO / "not for human consumption" labeling
- HS code mismatched to the actual product category
- No paper trail connecting the shipment to an institutional purchase order
TITRACE ships with a compliant invoice, RUO labeling, and a COA for every lot, and can provide additional documentation on request for institutions with specific import requirements. This article is provided for informational purposes only and is not legal or customs advice. TITRACE products are Research Use Only (RUO) and not intended for human or veterinary use.