The phrase “food grade” gets used loosely in the used-IBC market. Some sellers mean it precisely. Some mean “the bottle was made from FDA-compliant resin so technically the polymer is food-contact rated.” Some mean nothing in particular and are using the phrase to drive up price. As a buyer, you need to know which one you are getting.
What food grade should mean
In our four-grade system, “food grade” (we call it Grade 1) is a chain-of-custody designation, not a material designation. It means all of the following:
- The tote’s prior contents are documented at intake and the documentation is on file with us.
- Prior contents were confined to the food/beverage/cosmetic stream — edible oils, syrups, food acids, glycerin, ethanol, brewing adjuncts, cosmetic ingredients.
- The tote was reconditioned on our segregated food line, which never sees industrial chemistry.
- The replacement gaskets are NSF-certified for food contact, not generic EPDM.
- The final rinse uses reverse-osmosis permeate and the rinse-water conductivity falls below our threshold.
- A serial number ties intake, wash, leak test, and shipout into a single auditable record.
What it should not mean
It should not mean “the polymer is food-compatible.” That is true of nearly every HDPE IBC ever made and is therefore meaningless as a grade. A tote that held cleaning concentrate for ten years still has food-compatible polymer in it. You should not put corn syrup into it tomorrow.
Why segregation matters more than cleaning
A common assumption is that a sufficiently aggressive wash makes any tote food grade. This is not how regulators think and it is not how we think. The reason is contamination risk you cannot fully verify after the fact. Some industrial residues — particularly aromatic solvents, certain pesticides, and some adhesive carriers — can penetrate HDPE on the order of millimeters into the wall. No surface wash, no matter how hot or how caustic, removes what is already absorbed into the polymer.
The only way to guarantee a tote has not held those classes of chemistry is to know what it held. Segregated intake. Documented chain of custody. No reverse-engineering after the fact.
How to spot honest food grade
When you are evaluating a reconditioner or a tote, ask three questions:
- What was the documented prior content of this specific tote?
- Where do I see the chain-of-custody paperwork?
- Is your food-grade line physically separated from industrial?
A reconditioner who answers all three concretely is selling honest food grade. One who hedges or talks about “our cleaning process” instead of answering the questions is selling something else.