This is misleading. It makes it sound like the importer was responsible for the error because of his customs declaration form.
The product wasn't labeled and sold as glycerine simply because of a form on a customs declaration.
the importer must have thought that they ordered glycerine, but the Chinese manufacturer shipped the wrong item.
I believe I read diethylene glycol in the ingredient list on a can of Diet Dr. Pepper some thirty years ago.
I figured it was like methyl v. ethyl alcohol.