How long does pee last before it cant be tested accuratly?

Ok so i was wondering does urine go bad after you pee in the cup? Like If i pee in a cup, can a lab test it 12 hours later?

98% sure it can last a long time if sealed.

k, thats not good news.

Why?

10 characters.

Because last time i took a piss test, the lady told the guy to take my pee but not run it. Which is making me think that they are sending it to the lab that tests for k2. I havent smoked the k2 with the illegal substances but i dont know if they test for both illegal and legal chemicals in the different spices. Anyways if they do see ive been smoking k2, i get an automatic 3 months. They dont count using k2 as relapse which is dumb.

Damn, didn't even know you could test for JWH-018. Good luck not going to jail, it sucks.

yea, well im pretty sure they can only test for jwh-018, jwh-073. I havent smoked those ones cause i buy the legal ones now. I dont know what chemical is in it but it doesnt have jwh-018, jwh-73, hu-210, cp 73 or any other illegal substances.