Not yellow snow....yellow phosphoric acid?

[balrog]

Bought a big ole bottle of 85% phosphoric acid. I have a smaller bottle, formerly lactic acid, cleaned carefully, for syringing small amounts during brew days.

The large full bottle on the right is still nice a clear. The smaller bottle has been repeatedly opened, 2-3 a month, for a couple twotree months. It's yellow. WTF?

 

[day_trippr]

My 32 ounce bottle of Dudadiesel 85% PA is indeed still clear, so I have to believe gaseous contamination caused the color to appear.

fwiw, I dilute the 85% down to 25% and keep it in an old 250ml PA bottle and the diluted acid it's still clear as well so I don't think it'd be your smaller bottle causing the color...

Cheers!

 

[balrog]

Thanks it's proly easier (and safer) to do that anyway.