I would be concerned about using something that I couldn't prove to be food-safe.
I'm going to go ahead and ferment in the garbage can. I'm not worried about it being or not being food-grade. I've been a truck driver for dam-ned near thirty years. I've driven through a bunch of winters, through many a Spring with high winds and an empty trailer, and have been through major American cities like Chicago, Seattle, Los Angeles, San Franfreako and many others many, many times. I used to jump from the swings at the apogee of the forward arc when I was in grade school. I rode a minibike in Italy when I was a teenager in the 1970s. I include that because Italians do not stop at stopsigns in residential areas. They just toot their horn and blast on through. As you can imagine, they have a lot of two-vehicle accidents and always blame the other guy for the collision. My parents were always worried that I was going to be injured or get killed on my little bike because of how reckless are Italian drivers. I learned on that bike to always expect the alpha-hotels in my immediate vicinity to do something exponentially-stupid within the next few seconds. It has served me well as a trucker since late January 1994.
im sure others will reply, and i dont want to make it sound like people are jumping all over you, but i sell industrial PPE and have experience when i was younger (a few decades ago) working in crappy jobs where/when people didnt give a rats ass about protective equipment, indoor pollutants, chemicals, waste, safety in general.
this stuff is super important, i know you seem to be a senior citizen,
but toxins/contaminants/carcinogens are cumulative and you dont want to gamble on even increasing the likelihood of any of these things by any margin. the difference in cost broken down per pint of beer in buying proper, safe brewing equipment is going to literally be pennies if you brew often. a few cents, and not just that you may get flavour and/or fermentation problems caused by plastic leaching or anti-microbial properties in the plastic. reconsider this, you can likely return it and just say "it turns out it was the wrong type" or something.