EtG is a direct metabolite of ethyl alcohol and is a marker for recent alcohol exposure. EtG is nonvolatile, water soluble and stable. ETG URINE ALCOHOL TEST DIP CARD It may be detectable as soon as 2 hours after exposure and may be detected for up to 80 hours past consumption. EtG tests whether alcohol has been consumed and is most useful in testing individuals who should not be drinking at a...