Residual Solvents
and Processing Chemicals
Residual solvents are organic volatile chemicals that are used or produced in the manufacturing of products. Residual solvents analysis is required for manufactured cannabis products and pre-rolls. THC Analytical Lab identifies and quantifies the 20 analytes required by the state with gas chromatography–mass spectrometry (GC-MS). Samples that are tested for residual solvents and processing chemicals are deemed to have passed if they do not exceed the following limits:
Category I
Cannabis Product or Pre-roll Action Level (μg/g)
1,2-Dichloroethane
Benzene
Chloroform
Ethylene oxide
Methylene chloride
Trichloroethylene
1.0
1.0
1.0
1.0
1.0
1.0
Category II
Cannabis Product or Pre-roll Action Level (μg/g)
Acetone
Acetonitrile
Butane
Ethanol
Ethyl acetate
Ethyl ether
Heptane
Hexane
Isopropyl alcohol
Methanol
Pentane
Propane
Toluene
Total xylenes
5000
410
5000
5000
5000
5000
5000
290
5000
3000
5000
5000
890
2170