Zinc Oxide

About bulk Zinc Oxide

Zinc Oxide is supplied at 99% ZnO assay, milled to 80 mesh. It is sold in bulk by the kilogram, with pound and gram conversions available for quoting, so a requirement written in lb or g can be priced without converting it first. Every lot is batch-numbered, and that number follows the material through to the paperwork that ships with it. Buyers comparing bulk zinc oxide offers are usually weighing the same three things: the ZnO assay, the particle size, and whether the elemental zinc figure has been confirmed on the lot actually being offered rather than carried over from a generic data sheet. Ask us to quote and you receive the specification together with the current lot's certificate of analysis, so all three can be checked against real material before a purchase order is raised.

Zinc Oxide specifications

Specifications are taken from our own shipping and quality records. Figures are confirmed against the batch certificate of analysis at the time of quotation.

Formulating with Zinc Oxide

The 80 mesh grade is used in tablets, capsules and dry powder blends, and zinc oxide is also a common input in topical formulations. It is supplied as a dry powder rather than a solution or a ready-made premix, so it is normally taken in at the blending stage; if it has to sit inside an existing blend or a particular dosage form, send that form and your target inclusion level with the enquiry and we will check the current lot against it before quoting. Elemental zinc content is confirmed per lot on the certificate of analysis rather than published here; request it with your specification and we will send the current lot's figures. That per-lot figure is the one to design against, because a dose calculated on an elemental basis has to hold for the lot you actually receive, and the assay, the mesh and the heavy-metal results all sit on that same document.

Sourcing and quality control

The material is held in U.S. stock and ships from our domestic warehouse network. In practice that is the difference between a domestic lead time and one that has to absorb an ocean booking, a customs entry and whatever queue sits behind them, and it keeps the freight arrangement simple: one domestic shipment, on domestic terms, with no import file to manage. Each lot carries its own batch number, and we supply that lot's certificate of analysis with the shipment or on request, so assay, particle size and heavy-metal results tie back to the material in front of you rather than to a generic specification. On repeat business that same batch numbering is what lets you set one delivery against the last on equal terms, and trace a finished-goods batch back to the zinc oxide that went into it. We source through vetted, cGMP-compliant manufacturing partners.

Frequently asked questions

Further reading

• Bulk Zinc Oxide Buyer's Guide: Specs, Mesh Size and COAs
• How to Read a Certificate of Analysis for Bulk Ingredients