Based on our laboratory tests, we choose the most suitable shipping conditions to keep products in a low-temperature environment throughout logistics.

We use three shipping components:

• Polymer gel ice packs

• Foam box

• Carton

We ship by SF Express by default.

Most antibodies will not lose activity irreversibly after a short break in the cold chain.

You may first test a small aliquot to check staining signal. If the signal is clearly weaker than expected, you may apply for after-sales review after submitting the experimental results.

If the outer packaging is damaged or the goods look abnormal on receipt, we recommend the following:

• Refuse on the spot: if the outer packaging is clearly damaged or the goods look abnormal, you may refuse delivery. Please notify us immediately; we will coordinate with the carrier to inspect the package and replenish ice packs to protect product quality.

• Incoming check: within 3 business days of signing, check variety, quantity, arrival temperature and packaging against the packing list. If anything is non-conforming, raise a written objection within 3 business days, keep that batch unused, and wait for our confirmation.

• Liability: after verification, if the issue is caused by us or logistics, we will cover all return/replacement costs.

• Note: if you do not inspect or raise an objection within the agreed time, the batch will be deemed accepted for variety, quantity and packaging. If failure to inspect, notify or store the goods affects tracing, we reserve the right to refuse a return or replacement.

Please contact us if you have any questions.

What if a tube leaks during shipping?

Photograph the outer packaging and the leaking reagent in full, then contact customer service. After we confirm leakage, we will replace the product free of charge within 1 business day.

Provide the order number and photos of the tube. We will match the full QC information and replace it free of charge with a fully labeled product.

Room temperature: not recommended. Proteins stored at room temperature may degrade or lose activity.

Long-term storage: keep products at 2–8°C, protected from light.

Tips:

• Return reagents to a 2–8°C refrigerator immediately after each use to minimize time at room temperature.

• Avoid repeated handling, which reduces protein stability. We strongly recommend aliquoting the protein at first use.

Centrifuge the product after receipt; some liquid may remain on the inner wall or cap.

Each product is supplied to its labeled specification. At filling we add a small overfill above the nominal volume.

Volume above the nominal amount is process overfill for normal handling loss. It is not extra supply and is not billed separately.

We recommend storing products at 2–8°C.

If the product has frozen, thaw it slowly at 2–8°C and mix gently (do not vortex) before use.

If staining signal drops or disappears after thawing, you may apply for after-sales review after submitting experimental records.

Loss of antibody performance after the labeled expiry date is not covered by after-sales support. Please aliquot before expiry to avoid reduced performance affecting your results.