Subcritical Extraction

Subcritical extraction refers to solvent-based methods operating below the critical point of a solvent—typically CO₂ extraction at temperatures below 31.1°C and pressures below 73.8 bar. This low-temperature, low-pressure approach is commonly used in cannabis processing to preserve volatile aromatic compounds and cannabinoids that may degrade under supercritical conditions. Breeders and processors studying terpene profiles often employ subcritical techniques during strain evaluation to maintain the integrity of the original plant chemistry. The method contrasts with supercritical extraction, which uses higher energy to achieve broader compound extraction but may alter the terpene composition. Subcritical extraction is frequently referenced in breeding documentation when discussing strain phenotype preservation and analytical profiling.

Breeders working to document authentic terpene profiles of elite lines often collaborate with labs using subcritical extraction methods to establish baseline chemotype data. This technique supports accurate lineage records by capturing the volatile signature most representative of a strain's original genetics.