The phrase “food grade” gets used loosely in the used-IBC market. Some sellers mean it precisely. Some mean only that the bottle was molded from food-contact-compatible resin. Some use it to justify a higher price. As a buyer, you need to know which one you are getting.
What food grade should mean
For a used tote, the useful meaning of “food grade” is about history, not just material. At a minimum it should mean:
- The tote’s prior contents are known and were food, beverage or similar products.
- It was cleaned in a process that is kept separate from totes that held industrial chemicals.
- Gaskets and other wear parts are suitable for food contact.
- The seller can tell you what it held and how it was cleaned.
What it should not mean
It should not mean only that “the polymer is food-compatible.” That is true of most HDPE IBCs and says nothing about what the tote has held since. A tote that held cleaning concentrate still has food-compatible polymer in it. It is not a food tote.
Why history matters more than cleaning
Some residues, particularly certain solvents and pesticides, can be absorbed into HDPE rather than sitting on the surface. A surface wash cannot reliably remove what has been absorbed into the wall. That is why knowing the prior contents matters more than how aggressive the wash was.
Questions to ask
When you request a food-grade tote through a partner supplier, ask:
- What did this specific tote hold before?
- Can you put that in writing?
- Is the cleaning process for food totes kept separate from industrial totes?
- What gaskets and valve are fitted?
Clear, specific answers are a good sign. Vague answers about “our cleaning process” in place of the history are a reason to keep asking. Your own food-safety rules and regulators have the final say on whether a container is acceptable for your product.