Chlorine degradation due to heat over time

[benavidescj]

You guys have probably seen this. Nice chart showing 12% chlorine degradation over time due to heat.

[attachment=0:1ujby6e6]ChlorineDegradationHeatTime.JPG[/attachment:1ujby6e6]

 

[chem geek]

Thanks. That's a nice chart and seems roughly consistent with the table at the end of this link. The half-life (50% loss of concentration) of 12% bleach at 90ºF would be around 80 days or 11.4 weeks which is a little better than the projected 9 weeks in the chart, but the Odyssey product is supposed to be of high-quality mostly free of metal ions so that it lasts longer.

 

[Melt In The Sun]

When bleach decomposes, what does it become? Salt and oxygen?

 

[JasonLion]

Yes. See this post for details on the chemistry.

 

[juzzie]

Is there any way to test chlorine concentration at home?

Other than using the pool calculator and discovering you have a weak batch of liquid chlorine/bleach!