Kaolin is a fine, white china clay, an insoluble aluminosilicate mineral, and yes, the liquid portion does contain the morphine, but also, if the rest is washed, and allowed to resettle a few times (it is probably too fine to filter easily although given its weight, and insolubility, if the bottle (sealed, with additional liquid in it) were to be angled so that the bottom points outward, anchored on a spinning disk (bike wheel perhaps) then it could perhaps be centrifuged, to force the clay garbage to compact into a pellet on the bottom. Using a plastic bottle would be strongly encouraged, due to safety, lest it should dislodge and end up being wung off into the aether, only to un-wing itself somewhere, where it might be aimed say, through somebody's kitchen window, or to fly off and give someone's noggin a floggin'
Which needless to say would be an awful waste of morphine.v
And no, it isnt going to 'go bad' and turn to poison or anything, not unless there is actually mold growing all over it or something like that, but itself it isn't gonna expire like that. H is less stable, with it having those two labile ester linkages at the 3' and 6' phenolic hydroxyl groups of morphine, but even then, it would crack back to morphine if it did fully hydrolyze, or else to some 3- and some 6-monoacetylmorphine. Not likely an issue in anything other than really bad product like black tar or else stored in solution (H), where hydrolysis would be more rapid. This won't happen TO morphine however as it doesn't have the ester groups itself, we put them on there to make better things out of it like H or dipropionylmorphine, 6-monoacetylmorphine etc.
Have read of people finding jars of antique brand name heroin pills on BL before, and of course you know what they did with 'em don't you now

and they were still active when they did it too.
Hehe speaking of gear, I just fucking found some too, melted in a blob onto foil, under the sofa, must have dropped it
and had it float underneath, thankfully after it was melted on, and getting some fair tokes off it too.
Got two 4 packs of cold peroni and a couple of packs of cigars too. Gonna get me some methadone this week and all soon as someone lets me know how much they have available max.