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Misconception In the past the ocean has been described as having an ozone (O3) or iodine (I2) smell. However, this is erroneous and so too, therefore, are the following:- * the marketers who connect ozone with "the smell of the sea" in product descriptions such as, "hints of Ozone and sea spray" etc. (ref 1) * the Collins definition of ozone as a "clean bracing air as found at the sea side" (ref 2) * The writer Murray who wrote in the book Summoned by the Bells (1960) "breethe in the ozone, John it's iodine" (ref 3) Answer The candidate molecules actually responsible for the characteristic smell of the ocean include:- * dictyopterene, a conjugated, cyclopropane-containing, hydrocarbon, sex pheromone produced by certain female brown algae (ref 3, 4) * dimethyl sulfide (DMS) produced on the million tonne scale by phytoplankton, tiny bacteria-like creatures, which inhabit the ocean (ref 2, 5) References Ref 1: Regent House (2009), 'Wild Winds Fragrance Oil Boxed Product Description', available at http://www.regenthouse.co.uk/wild-winds-fragrance-oil-boxed-i266.html, accessed [Apr. 3, 2009] Ref 2: C. Kruszelnicki, ABC Science (Jun. 27, 2007), 'Ozone smell at the seaside' available at http://www.abc.net.au/science/articles/2007/06/27/1963637.htm, accessed: [Apr. 3, 2009] Ref 3: J. Claydon, N. Greeves, S. Warren, P. Wothers (2001), 'Organic Chemistry 1st edition', Chapter 40: synthesis of carbenes, page 1066, Oxford University Press, Italy Amazon: http://www.amazon.co.uk/gp/reader/0198503466/ref=sib_dp_pt#reader-link Ref 4: T. Kajiwara, A. Hatanaka, K. Kodama, S. Ochi, T. Fujimura (1991), 'Dictyopterenes from three Japanese brown algae', Phytochemistry, 30(6): 1805-1807

Ref 5: ScienceDaily (Feb. 3, 2007), 'Cloning the smell of the seaside', available online at http://www.sciencedaily.com/releases/2007/02/070201144849.htm, accessed: [Apr. 3, 2009]

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Q: What makes the ocean smell?
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