It's not true, has been perpetuated online for several years now. Look it up on Snopes.

BTW a compound one molcule away from antifreeze is an entirely different compound and nothing likeantifreeze.

There are many substances that are one molecule apart where one is dangerous and one is safe.

H2O (Water)
is one molecule from being
H2O2. (Hydrogen Peroxide)


As well as this from the SPCA:

http://www.aspca.org/site/News2?page...s_iv_ctrl=1400