Published by the European Cannabis Institute · Educational and professional reference content.
Solvent recovery can reduce cost and waste, but reuse introduces risks involving identity, impurity build-up, water content and cross-contamination.
Define the reuse strategy
The manufacturer should specify which solvent streams may be recovered, how batches are segregated and the maximum number of reuse cycles.
Recovered-solvent specification
Identity, assay, water, non-volatile residue and process-specific impurities should be controlled before reuse.
Equipment qualification
Still, condensers, receivers, transfer lines and controls should be qualified for capacity, containment, temperature, pressure and cleaning.
Contamination prevention
Campaign planning, dedicated equipment or validated cleaning may be needed when different products, solvents or potent materials share a system.
ECI perspective
Strong cannabis quality systems connect scientific evidence, product knowledge, validated methods and controlled operations. Organisations should document the rationale for their decisions and update it as evidence, processes and regulatory expectations evolve.
References
- ICH Q3C(R8) — Impurities: Guideline for Residual Solvents
- EU GMP Part I, Chapter 5 — Production
- ATEX Directive 2014/34/EU — Equipment for Explosive Atmospheres
Confirm the current effective version and national applicability before operational, regulatory or clinical use.