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WASHINGTON, Feb. 23, 2015 � You might have a pair of them on right now, or maybe you have to wait until casual Friday. Blue jeans are among the most popular clothing items in the entire world. But how did Levi Strauss get his “workwear,� as he called it, so blue? Through chemistry, of course. This week, Reactions looks at the chemistry of everyone’s favorite pair of pants. Check out the video here: .

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The American Chemical Öйú365betÖÐÎĹÙÍø is a nonprofit organization chartered by the U.S. Congress. With more than 158,000 members, ACS is the world’s largest scientific society and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio.