ANALYSIS RESIDUAL SOLVENT

Processors of cannabis concentrates utilize a variety of solvents to manufacture high-quality, potent, waxes and oils. Carbon-based organic solvents are used to dissolve or disperse another substance. Concentrates are extracted from cannabis plant material using organic solvents. While many of these commonly used solvents (ethanol, isopropyl, butane, propane) are generally regarded as safe, some residual solvents may remain in the final product based on the methodology used to extract the cannabis products from the plant.

For example, if a cannabis concentrate is not purged properly to eliminate the solvents used in the extraction process; residual solvent can remain in the concentrate when used by consumer. These residual solvents remaining in the concentrates can be harmful and toxic when inhaled or ingested over time. Residual solvents are typically not acutely toxic but may have a long-term effect on exposed individuals. Therefore, it is vital that cannabis products be tested for such contaminants to ensure consumer safety.

ACTION LIMITS FOR RESIDUAL SOLVENTS – PARTS PER MILLION (PPM)
SOLVENT CHEMICAL ABSTRACT SERVICES (CAS) REGSITRY NUMBER ACTION LIMIT FOR PRODUCTS MEANT FOR INHALATION (PPM) ACTION LIMIT FOR ALL OTHER PRODUCTS (PPM)
1,2-Dichloroethane 107-06-2 2 5
Acetone 67-64-1 750 5000
Acetonitrile 75-05-8 60 410
Benzene 71-43-2 1 2
Butanes (all isomers) 106-97-8 800 5000
Chloroform 67-66-3 2 60
Ethanol 64-17-5 1000 5000
Ethyl acetate 141-78-6 400 5000
Ethyl ether 60-29-7 500 5000
Ethylene oxide 75-21-8 5 50
Heptane 142-82-5 500 5000
Hexanes (all isomers) 110-54-3 50 290
Isopropyl alcohol 67-63-0 500 5000
Methanol 67-56-1 250 3000
Methylene chloride 75-09-2 125 600
Pentanes (all isomers) 109-66-0 750 5000
Propane 74-98-6 2100 5000
Trichloroethylene 79-01-6 25 80
Toluene 108-88-3 150 890
Total xylenes (ortho-, meta-, para-) 1330-20-7 150 2170