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Is Ethanol Extraction GMP Compliance?

The whole point of being GMP compliance is that the final product has always the same consistency and reproducibility.

Let's assume we make a first ethanol extraction with fresh ethanol and then recover that solvent in a roto evaporator
This recovered ethanol is no longer pure, so it is no possible to reintroduce it to the process and make a second or third run because it can have cannabinoids or terpenes attached.

If my facility wants to be GMP compliance we will need to use fresh ethanol every extraction? This will make the operation unaffordable in the long term

If the ethanol can be re-purified in order to make it fresh again does this ethanol need to be certified by a 3rd-party laboratory in order to assure that it doesn't have any terpenes or cannabinoid remaining?

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