Using Betadine to check mash conversion?

[Lenny2884]

I have an old bottle of betadine I found sitting in my bathroom closet and was wondering if this was a suitable iodine solution to use for checking mash conversion. I'm assuming it is since it contains iodine, but the bottle says it only contains 1% iodine. Is this enough to be used to test for mash conversion and is there an expiration date for this product? Thanks guys.

 

[Scut_Monkey]

I would think it's fine. I thought Betadine was simply an old school brand name for iodine disinfectant. If you would really like to know take a pinch of flour and put it in some water and try it. If it turns inky black with a few drops it should work fine.

 

[mcpusc]

Betadine is almost the same thing as Iodophor, either one works fine for starch testing. As for expiration, it will loose its color with age. If it's still purple, it's still fine.