I need a crystal-clear transparent liquid that is as heavy (dense) or heavier than water, not dangerous, and not difficult to obtain. The heavier the better. The catch - it can't be water-based. [more inside]
posted on Jul 18, 2008 - 23 answers

Help me find a research-based list of substances and /or ingredients that are or could be harmful to children in amounts normally found in households. [more inside]
posted on Jul 14, 2008 - 4 answers

SilentHillFilter - what would the previous owners of our house want with a large, half-empty bottle of chloroform? [more inside]
posted on Mar 10, 2008 - 21 answers

OK, so there are apparently 4000 different chemicals in a cigarette, right? But as I understand it, the only substance that makes it addictive is nicotine. So why don't cigarette companies simply not include all these various chemicals? Does their removal lessen the 'joy' smokers get from smoking a cigarette? What's their purpose? [more inside]
posted on Feb 21, 2007 - 44 answers

Help me learn everything(!) about sulfuric and nitric acid: production, purity and distribution [more inside]
posted on Oct 7, 2006 - 9 answers

If you're taking medication that alters your personality, do you let people know? What kind of pitfalls or issues do you face with this kind of thing? [more inside]
posted on Apr 26, 2006 - 15 answers

FormularyFilter? Compounding my own salicylic acid facial peels: do I need to use pharmaceutical grade ingredients? [more inside]
posted on Nov 6, 2005 - 12 answers

My boss gave me an interesting assignment. . .Do they use Roundup (herbicide) in Sweden? [more inside]
posted on Sep 27, 2005 - 16 answers

CatFilter: Kitty + Nasty chemicals = Disaster. More inside.
posted on Feb 6, 2005 - 10 answers

Can someone please explain to me the argument against genetically-engineered foods? If science can increase our agricultural output, why shouldn't we take advantage of it? What are the hidden consequences of growing GE crops and raising GE animals?
posted on Jan 31, 2005 - 39 answers

Health question involving constipation. More inside to prevent offending delicate sensibilities.
posted on May 21, 2004 - 34 answers