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Solubility Definitions.
| Descriptive Terms | Parts of Solvent Required for 1 Part of Solute |
Solubility Range | |
|---|---|---|---|
| mg/mL | % | ||
| Very soluble | Less than 1 | > 1,000 | >100 |
| Freely soluble | From 1 to 10 | 100 ~ 1,000 | 10 ~ 100 |
| Soluble | From 10 to 30 | 33 ~ 100 | 3.3 ~ 10 |
| Sparingly soluble | From 30 to 100 | 10 ~ 33 | 1 ~ 3.3 |
| Slightly soluble | From 100 to 1,000 | 1 ~ 10 | 0.1 ~ 1 |
| Very slightly soluble | From 1,000 to 10,000 | 0.1 ~ 1 | 0.01 ~ 0.1 |
| Practically insoluble | 10,000 and over | ≤0.1 | ≤0.01 |
