FAQ.

Royal Mail Tracked24 with Age Verification add-on on every parcel, dispatched from Newport, South Wales. Most UK orders land within 48–72 hours of dispatch. You receive a tracking link by email at the point the label is generated, and a signature is required on delivery because every parcel ships under age-verified services.

Vials are lyophilised (freeze-dried) at the point of dispatch — no cold-chain packaging is required for the transit window. The COA for your lot is folded inside the dispatch envelope and also accessible by scanning the QR on the vial label.

No. We use Royal Mail Tracked24, which is a target service rather than a contracted-time service. The vast majority of orders arrive within 48–72 hours of dispatch, but Royal Mail does not compensate for late deliveries on Tracked24, and neither do we. If a parcel is lost in transit (tracking stalls for 10+ working days) we replace it; if it is simply slow, we wait with you.

Yes, with a separate-payment step. Pick the international option at checkout and you pay the product subtotal at the normal time; the order lands with shipping marked as "quoted after order". Paul fetches a carrier quote (Royal Mail Tracked International or equivalent) and emails you a separate payment link for the postage figure. Once the shipping invoice is paid, the parcel dispatches. Customs paperwork is the customer's responsibility — we cannot pre-clear duties or VAT for every destination.

Two reasons. First, UK age-verification rules for research compounds require that the goods are handed to an adult — a signature on delivery is the proof of handover. Second, signed-for tracking gives both of us recourse if the parcel goes missing. The £1.85 we pay Royal Mail for the AV add-on is the difference between a clean replacement claim and an argument.

HPLC purity is a measurement of how much. The chromatogram separates everything in the sample into peaks by retention time, and the area of the target peak relative to the total is reported as a percentage. A 99% peak says 99% of the sample mass eluted at the right retention time.

Mass-spec identity is a measurement of what. The mass spectrometer weighs each fragment leaving the column. If the observed mass matches the theoretical mass of the target peptide sequence within tolerance, identity is confirmed. Without it, a 99% purity figure only tells you the sample is 99% of something — not necessarily 99% of what you ordered. The journal piece on COAs walks through both in detail.

Our supplier Janoshik. Every lot we release has been sampled at random (three vials) and run by Janoshik for HPLC purity and HPLC-MS identity. Per-lot certificates are available on request.

Conflict of interest. If we tested our own lots, we would be marking our own homework — the lab releasing the product would be the same lab releasing the data, and the certificate would be worth less for it. An independent third-party laboratory has no financial stake in whether a lot passes spec, so when it passes, the result is meaningful.

Every vial carries a lot ID — laser-etched on the label as plain text — and a QR code. The lot ID on the vial must match the lot ID printed on the COA. Scanning the QR resolves to the same certificate in our archive. If the lot ID on the paper and the lot ID on the vial disagree, do not use the vial; contact us with the lot ID and we will trace the mismatch.

Yes, within the research-use framework. The catalogue compounds are sold strictly for in-vitro and laboratory research, not for human or veterinary use. Sale of research chemicals labelled as such for laboratory research is lawful in the UK for over-18s, which is why every parcel ships under age-verified services and why checkout requires 18+ verification. We do not provide dosing protocols, administration guidance, or therapeutic claims of any kind — those would fall outside the research frame.

We don’t give a protocol-level answer because we don’t give protocols. The general bench observation is that most peptides in solution last days at room temperature, four to six weeks refrigerated at 2–8 °C, and degrade faster with light exposure, repeated freeze-thaw, or oxygen ingress through a punctured septum. The reconstitution basics journal covers this in detail; the calculator handles the arithmetic.

Photograph the damaged parcel and the vial (lot ID visible if possible) before opening anything further and email the photos to support within seven days of delivery. We replace breakages at our cost. Royal Mail Tracked24 with AV is insured and we are the ones who file that claim, so you don’t need to deal with the courier directly.

Lyophilised research compounds ship sealed and tamper-evident, so they are exempt from the 14-day change-of-mind return under regulation 28(3)(a) of the Consumer Contracts Regulations — we do not accept change-of-mind returns. Opened or punctured vials are non-returnable for the same hygiene reason: once the septum is breached, sterility is no longer assured and we cannot put the product back into stock. If a vial arrives faulty or out-of-spec (visible contamination, broken cake, mismatched lot ID, or a compromised seal on arrival), contact us within 48 hours with the lot ID and photos and we will replace it at no charge. Your statutory rights in respect of faulty goods are not affected.