I couldn't find data: None of my colleagues has answered your post so I'll take a swing at it. It appears that several chemicals are used to purify sugar cane etc into white sugar (brown sugar has molasses, too). But I couldn't find a reputable source stating how much formalin was allowed in sugar. OTOH I did find FDA's 2013 food standards on pg 17 of 21 (http://goo.gl/11njl8).
Answered 5/29/2015
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A doctor has provided 1 answer
A doctor has provided 1 answer
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