Levels of solubility


Below we describe commonly used terms which describe levels of solubility. These descriptive levels can be found in literature and usually they refer to ranges of solubility listed below.

The ranges are a guideline, not fixed exact figures and are used to loosely describe solutes solubility levels rather them to separate them out into different groups.

Descriptive LevelParts of solvent per 1 part of solute (material)
Very SolubleLess than 1
Freely SolubleFrom 1 to 10 
SolubleFrom 10 to 30
Sparingly SolubleFrom 30 to 100
Slightly SolubleFrom 100 to 1000
Very Slightly SolubleFrom 1000 to 10,000
Practically Insoluble, or InsolubleMore than 10,000