Urinary screening test for spice (K2, synthetic cannabinoids)

Test of synthetic cannabinoids type K2, or "Spice"

NarcoCheck NarcoCheck



Urine test for the detection of synthetic cannabinoids type K2, also called Spice.

K2 has been the first generation of synthetic cannabis to appear on the market.

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The NarcoCheck® K2 rapid test strip is an immunoassay for fast the detection in human urine of synthetic cannabis of type "K2". This synthetic cannabis is now also known as SPICE.

Synthetic cannabis has nothing to do with natural cannabis. It is actually an active chemical and artificial substance. It is called "cannabis" because it mimics natural cannabis by acting on the same receptors of the organism, namely the CB1 and CB2 receptors.

Its chemical composition is completely different from natural cannabis, and as such, synthetic cannabis must be screened with a test specific to it, just like any other drug.

Whatever the name used, synthetic cannabis, spice, K2, or "herbal incense", these substances are now totally illegal and classified as narcotics.

What is the difference between the K2, K3 and K4 test?

There are 3 types of synthetic cannabis:

  • The K2, or Spice, which appeared in the mid-2000s.
    It is this form of synthetic cannabinoids that this test detects.
    K2 is still widely found in various seizures made around the world. Over time K2 has taken the form of various groups of molecules, such as AM, HU, JWH, CP etc.

  • The K3, a new generation of synthetic cannabinoids, which has been increasingly found on the market since 2014-2015.
    There is a specific NarcoCheck urine test for K3 (AB-Pinaca)

  • The K4 is a third type of synthetic cannabinoids, which has been on the market since 2014-2015.
    There is a specific NarcoCheck urine test for K4 (UR-144)


Data sheet

Test typeUrine
ReliabilityUp to 99%
Results in5 minutes
Detection time48h (or even more) after last intake
Cut-off (detection standard)25 ng/ml More details Less details

Cut-off details


Substanceconcentration (ng/ml)
JWH-018 (pentanoic acid)25 ng/ml
JWH-073 (butanoic acid)25 ng/ml
JWH-018 (4-hydroxybutyl)300 ng/ml
JWH-073 (4-hydroxypentyl)300 ng/ml