I did a quick Google search and came up with this:

http://www.scorecard.org/chemical-profiles/hazard-indicators.tcl?edf_substance_id=123%2d31%2d9

http://ptcl.chem.ox.ac.uk/MSDS/HY/hydroquinone.html


If this is for Acne, you may want to try these (click on the attachments):

Acne Homeopathic and Skin Detox (Ayurvedic)

Hope this helps.

The Captian
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