Editing Uric acid (section)

===Water solubility===
In general, the water [[solubility]] of uric acid and its [[alkali metal]] and [[alkaline earth]] [[Salt (chemistry)|salts]] is rather low. All these salts exhibit greater solubility in hot water than cold, allowing for easy recrystallization. This low solubility is significant for the [[etiology]] of gout. The solubility of the acid and its salts in [[ethanol]] is very low or negligible. In ethanol/water mixtures, the solubilities are somewhere between the end values for pure ethanol and pure water.{{medical citation needed|date=August 2024}}
:{| class="wikitable sortable"
|+ Solubility of urate salts (grams of water per gram of compound)
! data-sort-type="text" | Compound
! data-sort-type="number" | Cold water
! data-sort-type="number" | Boiling water
|-
| Uric acid
| align=right | 15,000
| align=right | 2,000
|-
| Ammonium hydrogen urate
| align=center | —
| align=right | 1,600
|-
| Lithium hydrogen urate
| align=right | 370
| align=right | 39
|-
| Sodium hydrogen urate
| align=right | 1,175
| align=right | 124
|-
| Potassium hydrogen urate
| align=right | 790
| align=right | 75
|-
| Magnesium dihydrogen diurate
| align=right | 3,750
| align=right | 160
|-
| Calcium dihydrogen diurate
| align=right | 603
| align=right | 276
|-
| Disodium urate
| align=right | 77
| align=center | —
|-
| Dipotassium urate
| align=right | 44
| align=right | 35
|-
| Calcium urate
| align=right | 1,500
| align=right | 1,440
|-
| Strontium urate
| align=right | 4,300
| align=right | 1,790
|-
| Barium urate
| align=right | 7,900
| align=right | 2,700
|}

The figures given indicate what mass of water is required to dissolve a unit mass of compound indicated. The lower the number, the more soluble the substance in the said solvent.<ref>{{cite book|title=CRC Handbook of Chemistry and Physics|title-link=CRC Handbook of Chemistry and Physics|publisher=[[CRC Press]]|year=1981|editor-last=Weast|editor-first=R. C.|edition=62nd|location=Boca Raton, FL|oclc=7842683}}</ref><ref>{{cite book|title=Merck Index|publisher=Merck|year=1976|isbn=978-0-911910-26-1|editor-last=Windholz|editor-first=M.|edition=9th}}</ref><ref>{{cite book | title = Uric acid | first = Francis H. | last = McCrudden | page = 58}}</ref>