Shipping Policy
Last updated: August 2026
Domestic Shipping (United States)
Orders are shipped via USPS. Handling time is up to one week before the order ships. All orders over $50 ship free. Available services include Ground Advantage (5–7 business days), Priority Mail (2–3 business days), and Priority Mail Express (1–2 business days).
Packaging
All lyophilized analytical standards are shipped in temperature-protective packaging with desiccant. Keep product refrigerated. Do not shake. Do not allow product to exceed 86°F.
Tracking
Tracking numbers are provided via email once your order has been fulfilled and a shipping label has been purchased.
Contact
Zavin Sales LLC. Contact us through on-site chat support. Or by email [email protected]