Ok, found it -- 15% dichlor + 30% MPS. It's NOT something to buy again, and would screw up testing. But if you go ahead and use it up now, it should be all gone by the time the K-2006 arrives. Do NOT throw it in the trash.

Instead, reduce your bleach dose by 2 gallons (4, instead of 6), and scatter 3 bags of shock to replace the bleach. That way, it will be gone by tomorrow PM, and out of your pool by Friday.