I use the pigeon ones and there is no mention of any chemical used (ie no number in a symbol on the bottle anywhere).
So either they aren't disclosing it, or it doesn't get used....
i just checked all mine and i dont have any numbers on them. I got all mine last year in April. Maybe something to do with when they were manufactured?
Melissa - you may be onto something there - I brought mine last year too - probably between January and... uh.. maybe april or May? Before we switched to Pigeon anyway..
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