Chemistry Forum

I am carrying out some bioassay tests on a chemical known as methoprene. The protocol I am following states that all glassware must be salinized to prevent the methoprene sticking to the glassware. I have not found salinization to be an issue and obtain the same results in salinized and non salinized glassware. I am therefore questioning if this problem really does bind to glassware more than any of the other compounds I commonly test without the need for glassware salinization. Could someone please take a look at the structure of the three compounds I have listed below and let me know if any why any of them would stick to glassware.

http://en.wikipedia.org/wiki/Methoprene

http://en.wikipedia.org/wiki/Permethrin

http://en.wikipedia.org/wiki/Temefos

With my limited knowledge I would guess permethrin to be the most electronegative and therefore most likely to bind to glassware.

Thanks I an advance for any responses

Alan

Thanks for the post. I learned a lot about electronegativity.