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Test Benefits

At Encore Labs, we employ a sensitive HS-GC/MS method to determine which trace solvents are present and if they pass state requirements.

Test Benefits

Pesticide Limits By State

Each state requires different action levels for various residual solvents to be tested. Below are the DCC and AZDHS action limits for residual solvents testing.

California splits up the 20 residual solvents into Category I and Category II, with Category I severely limiting the allowable action limit. Arizona only requires testing for 17 residual solvents and does not make any distinctions between Category I and Category II.

Category I Residual Pesticides Action Level (Inhalable) μg/g Action Level (Non-Inhalable) μg/g
1,2-Dichloroethane 1
Benzene 1
Chloroform 1
Ethylene Oxide 1
Methylene Chloride 1
Trichloroethylene 1
Category II Residual Pesticides Action Level (Inhalable) μg/g Action Level (Non-Inhalable) μg/g
Acetone 5000
Acetonitrile 410
Butane 5000
Ethanol 5000
Ethyl Acetate 5000
Ethyl Ether 5000
Heptane 5000
Hexane 290
Isopropyl Alcohol 5000
Methanol 3000
Pentane 5000
Propane 5000
Toluene 890
Total Xylenes 2170
Pesticides, Fungicides, Growth Regulators Allowable Limit (ppm)
Acetone 1000 ppm
Acetonitrile 410 ppm
Benzene 2 ppm
Butanes 5000 ppm
Chloroform 60 ppm
Dichloromethane 600 ppm
Ethanol 5000 ppm
Ethyl Acetate 5000 ppm
Ethyl Ether 5000 ppm
Heptane 5000 ppm
Hexanes 290 ppm
Isopropyl Acetate 5000 ppm
Methanol 3000 ppm
Pentanes 5000 ppm
2-Propanol (IPA) 5000 ppm
Toluene 890 ppm
Xylenes 2170 ppm

What We Test For

Regulation

Residual Solvents and Processing Chemicals Testing

  1. The laboratory analyzes a portion of the representative sample of manufactured cannabis product or pre-rolls to determine whether residual solvents or processing chemicals are present.

  2. The laboratory shall report the result of the residual solvents and processing chemicals testing in unit micrograms per gram (μg/g) and indicate “pass” or “fail” on the COA.

  3. Solvents tested include Acetone, Benzene, Butanes, Ethanol, Heptane, Hexanes, Methanol, Pentanes, Isopropanol, Propane, Toluene, and Xylenes.

  4. The sample is considered passing testing if the presence of any residual solvent or processing chemical is below established limits.

  5. If a sample fails residual solvents and processing chemicals testing, the batch from which the sample was collected fails residual solvents and processing chemicals testing and shall not be released for retail sale.

Method

HS-GC/MS (Headspace Gas Chromatography Mass Spectrometry)