Another thing to check is see if its a HDPE stamped plastic. If it is stamped as such its most likely food grade.
Some HDPE plastic is food safe, but if you're really concerned about this topic and want to make sure your container is food safe, don't rely on the HDPE stamp alone. Verify from the seller that it's made from FDA-approved food safe plastic.
For example, a Home Depot orange "Homer" bucket is stamped HDPE. On the Home Depot website, it says, "Use for mixing paint, hauling topsoil, storing parts and for other purposes. Ideal for use as a utility pail on work sites." This is not a food safe container.
Elsewhere at Home Depot, you'll find Premium 5 gallon food storage buckets. They say, "Leaktite's 5 Gal. premium storage containers are manufactured to meet FDA standards for safe food storage. The premium design is manufactured from high quality plastic and is tough enough to store nails and screws along with any standard home or food needs." This is a food safe container.
As another member points out, you can always use a non-food safe container as long as you line it with something that is food safe. Unscented trash bags are not food safe unless they say "food safe" on the package. A Reynolds turkey bag or a Ziploc Big Bag would be food safe.
Again, not everyone is as concerned about such things as other people. But if you are concerned, don't assume anything--you must verify.
Regards,
Chris