From the transcript (I dislike watching videos), it appears the video never discusses the chemicals involved - but I’m sure some of them are rather toxic. It is an old film, and when it was produced people didn’t see the toxicity of chemicals used in manufacturing processes as being as worthy as note as people do today - both environmental and workplace health/safety issues were less on people’s radar. Plus it obviously is marketing/PR for the manufacturer, and who wants to mention toxic chemicals in something like that?