1,2,3-trihydroxybenzene, C6H3(OH)3, a white crystalline solid, m.p. 132°C. Alkaline solutions turn dark brown on exposure to air through reaction with oxygen. It is a powerful reducing agent, employed in photographic developers. It is also used in volumetric gas analysis as an absorber of oxygen.
Pyrogallol
- sand ribbon
- sand sheet
- sandstone
- sandstone dyke
- sandstorm
- sandur
- sand volcano
- sand wave
- sand-wedge polygons
- sandwich compound
- sandwich theorem
- San Francisco Conference (1951)
- Sangamonian
- Sanger, Frederick
- Sanger, Frederick (1918–2013)
- Sanger’s reagent
- Sanhedrin
- sanidine
- sanitization
- San Jacinto, Battle of (21 April 1836)
- Sankara
- Sankaracharya (700–50)
- Sankhya
- San Marco
- San Marino