best advice is to trust your supplier really mate, short of having access to a lab with the relevant equipment you just dont know whats in there regarding dosage/substance.
only advice i could give you regarding sterility is to hold the amp up to a strong light and try and see if their is anything floating in it. the light should shine right through, try and see if you can see anything shining back at you from inside the oil.
twice i have seen what looks like a hair floating in admittedly what i knew to be crap gear in the vial. |