"compounds, some of which may be toxic may be evolved"

13:37 Jun 16, 2015 

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http://www.proz.com/siterules/kudoz_general/1.4#1.4

12:45 Jun 16, 2015 

Thank you for your answers, but I am still not 100% sure. I found that "to evolve" has a specific meaning in Chemistry:
evolve: to give of, emit
(Chemistry) (tr) to yield, emit, or give off (heat, gas, vapour, etc).
Any English native speakers out there who could help us understand the meaning of "may be toxic may be evolved"?