Shipping & returns
Last updated 7 September 2026 · applies to all orders placed on this siteWe ship within the United States only. The rate and delivery window below are the ones quoted at checkout and shown on every product page. These terms must match our Merchant Center shipping and returns settings exactly; if you ever see a difference, the price at checkout is the one we charge and we would like to know about the discrepancy.
Rate and delivery time
| Service | Delivery | Cost |
|---|---|---|
| [CARRIER] standard, tracked | [N]–[N] business days | Flat $[SHIPPING] |
One flat rate applies to every order, with no free-shipping threshold and no expedited option at launch — a single published rate is the only version that can match the feed exactly. Delivery windows begin the business day after dispatch and exclude weekends and public holidays. We do not ship to freight forwarders or outside the United States.
Dispatch
Orders placed before [TIME] [TIMEZONE] on a business day are dispatched the same day. Orders placed after that, or at a weekend, are dispatched the next business day. You receive tracking by email at dispatch, together with the certificate of analysis for the lot in your parcel.
Materials are packed in the sealed, labelled cartons shown on the product pages. Where a material states a temperature requirement on its product page, that packing method is applied automatically — no action is needed at checkout.
Returns
Unopened materials in their original sealed carton may be returned within [N] days of delivery. Because the integrity of a research material cannot be verified once its seal is broken, we cannot accept a return after opening, and returned material is destroyed rather than resold.
- Email us with your order number within [N] days of delivery.
- We reply with a return authorisation and the return address. Returns sent without one cannot be processed.
- Once received and inspected, the refund is issued to the original payment method within [N] business days.
Damaged, incorrect or missing parcels
If a parcel arrives damaged, if the lot number on the carton does not match the certificate we sent you, or if tracking shows delivery and the parcel is not with you, contact us within [N] days with your order number and a photograph where relevant. We replace or refund in full, including shipping, and we cover the cost of returning anything incorrect.
Return shipping on a change-of-mind return is paid by the customer; original shipping is not refunded.