Grant Wilkinson
Rob: Your point is a good one. People in the US tend to talk about "DNA" as being one product. In Canada, there are about 50 different formulations for DA. (It's DA in Canada, not DNA. DNA is something completely different. The Canadian regulations that spell out how to adulterate alcohol set out DA grades.) To give an extreme example, in Canada, gasoline with 10% alcohol in it is a DA grade. So, when shopping for DA in Canada, at least, turners should look on the label to see just what denaturant has been added to the pure alcohol. Some denaturants are very toxic.