On This Day In Chemistry

November 3rd

The first U.S. patent for antifouling paint for ships’ hulls was issued on this day in 1863

It was made from a mixture of a copper oxide (CuO), tar and naphtha, and offered protection against growth of barnacles and seaweed for twelve months. There are now concerns that copper oxide based antifouling paints are environmental pollutants, and replacements are being introduced.

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