White stuff floating ontop of D-76

I just mixed a fresh batch of D-76, started with 2000ml (2 liters) of

warm (around 130-145 F), disolved the powder into it until it was

clear and nothing left on the bottom. I left it stand for a few

minutes (5-10) when I went off to take care of something else, when I

came back to pour the solution into the gallon jug with the rest of

the water (to bring the total volume up to 3.8liters), there was white

stuff floating in the top of the graduate. It stuck to the screen in

the funnel (making the pouring process quite slow), but after puting

the rest of the water through the funnel, the white stuff had gone

through and apparently disovled since I couldn't see anything floating

on top in the bottle. My question is has anyone seen this, and should

I dump this batch and start fresh? I did mix with distilled water,

which I heated on the stove, so I suspected I might have gotten the

water too hot? Any insights and/or advice is greatly appreciated.

 

Peter

Don't discard the D-76. It dissolves about as fast as it's going to

at 110 F. Your higher temperature may have caused the white

flocculence. It's apparently just a form of undissolved powder

that dissolves in a short time. I've used D-76 even when a little

of the flocculence is still there.

Just use a number 2 Melitta cone shaped filter holder and a paper coffee filter to remove any of the particulate matter as you pour the solution into your bottles. As mentioned, I'm sure 99.99% of the D-76 from the package will be in solution.

I checked this morning and didn't see anything on the top of the chem in the bottle, I did filter it again with a paper coffee filter, and didn't get anything in the filter so it did disolve when I put the rest of the water in. Thanks for the responoses, I never thoguht of using a coffee filter, I'll have to remember that one.

 

Peter

The powder will go into solution more easily if you can get the water

volume up to 1 gal (instead of mixing in 2 liters, add the rest to 3.8)

while you are mixing it.

Here in the US, packaged D-76 is sold in quantities to make 1 gallon. The package directions instruct you to mix the powder with about 3 quarts of water at about 100 deg. F., then add water to make 1 gallon. Two litres of warm water may not be enough to make all the powdered chemical go easily into solution.