AllChemicals — The Online Chemical Glossary | https://allchemicals.info/chemical/353-distilland
Expert Written
|
Fact Checked
|
Sources Cited
|
AllChemicals Editorial Team
Quick Reference
Also Known As
Still pot contents, still charge, flask residue (during distillation)
What is Distilland?
The liquid mixture subjected to distillation from which a component is being separated. It is the starting material placed in the distillation flask. The distilland contains the less volatile components that remain after the more volatile fraction has distilled over.
Properties & Characteristics
The distilland is the liquid mixture placed in the distillation flask that is subjected to heating and vaporisation during a distillation process. As the more volatile component(s) evaporate and are collected as distillate, the composition of the distilland changes, becoming progressively enriched in the less volatile component(s). In fractional distillation, the distilland composition changes continuously.
Uses & Applications
In analytical and preparative distillation, monitoring the distilland composition helps determine when collection of a fraction is complete and when to discard fore-runs or residues. In essential oil steam distillation, the aqueous distilland is discarded after the oil distillate is collected.
Safety Information
The distilland in the flask can become concentrated in less volatile, more hazardous components (e.g., high boiling point solvents or residual reactive compounds). Never let the distilland flask go to dryness unless specifically intended, as concentrated residues may be explosive (e.g., peroxide concentrates).
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
SynonymsStill pot contents, still charge, flask residue (during distillation)
Frequently Asked Questions
The liquid mixture subjected to distillation from which a component is being separated. It is the starting material placed in the distillation flask. The distilland contains the less volatile components that remain after the more volatile fraction has distilled over.
In analytical and preparative distillation, monitoring the distilland composition helps determine when collection of a fraction is complete and when to discard fore-runs or residues. In essential oil steam distillation, the aqueous distilland is discarded after the oil distillate is collected.
The distilland in the flask can become concentrated in less volatile, more hazardous components (e.g., high boiling point solvents or residual reactive compounds). Never let the distilland flask go to dryness unless specifically intended, as concentrated residues may be explosive (e.g., peroxide con…
Editorial standards: Chemical data is sourced from peer-reviewed literature,
CAS Registry, NIST WebBook, and PubChem. Safety information reflects guidance from OSHA, ECHA,
and IAEA. For educational purposes only — always consult official SDS documentation and qualified
professionals before handling chemicals.
