there are cheap color reagents for opates sold on internet that will give an idea if it is real or not...otherwise you can try to turn it from salt to a base with ammonia (a simple reaction), base is not water soluble, impurities are. And if you have access to specrtrometr that's the best way!
I heard that if you dip your finger in it, and touch the tip of your tongue it should feel a little numb if it's good quality.
test tungsten purity
You test positive for morphine after you use heroin
No, Methadone will not hide heroin on a drug test.
Stop taking heroin.
No, you can't.
How can you detect heroin in a drug test if you are on suboxone??
The heroin will be, but the metabolites they test for won't.
How about you don't do heroin crack baby
You test it by checking the melting point
Heroin. Actually, there's seldom much interest in distinguishing which specific opioid drug you took, so heroin, opium itself, and morphine all test as pretty much the same thing.
The best and trusted way is by chemical test
Codine is an opiate, and heroin is also an opiate. So if drug tested after taking Codine, you would test positive for opiates. Drug tests don't test for "heroin" or "Marijuana", they test for THC or Opiates, and other various controlled compounds.