CakerIt should actually be polyvinyl acetate.
Even for vinyl acetate:
"There is no evidence that vinyl acetate causes cancer in humans. Vinyl acetate caused tumors in the noses of rats that breathed 600 ppm for 2 years. The International Agency for Research on Cancer (IARC) has determined that vinyl acetate is possibly carcinogenic to humans (Group 2B)." https://www.atsdr.cdc.gov/phs/phs.asp?id=669&tid=124
CakerNot sure what the concern is. Hi-Soft boards are not carcinogenic. They're used in 99.99% of restaurants throughout the world.
Besides, what one uses to oil their wood board can be a concern too. I'm not one to enjoy having a crude-oil product touch my food, especially one thats typically used as laxative and may have potential long term effects. So then there's the nut/seed oils which have their own set of concerns.
CakerFirst sentence in the link you posted:
"Evaluation: There is inadequate evidence in humans for the carcinogenicity of vinyl acetate. There is limited evidence in experimental animals for the carcinogenicity of vinyl acetate."
I'm no doctor, but I am a chemical engineer who has been in and out of plants dealing with vinyl acetate and polyvinyl chloride. They can be toxic in the liquid form dealt with in the plants, once they are fixed into the finished product however they are quite safe.
*Edited for grammar*
CakerThese boards are not made of vinyl acetate but rather polyvinyl acetate. VA is a precursor to PVA and PVA is a very common material mostly used as glue. In fact, most wood glues (including those to make many cutting boards) are primarily PVA.
The massdrop description is wrong, or rather incomplete at best.
https://toxnet.nlm.nih.gov/cgi-bin/sis/search/a?dbs+hsdb:@term+@DOCNO+190
https://www.atsdr.cdc.gov/phs/phs.asp?id=669&tid=124