Sodium Thiosulphate Movies

Sodium Thiosulphate Video No. 1 - Observe the slow formation of crystallites as heated preparations of sodium thiosulphate are slowly cooled and photographed under polarized illumination. Digital videos were recorded at a magnification of 50x and a playing time of 4.6 seconds. Choose a playback format that matches your connection speed: 28.8k (modem), 56.6k (modem), or T1/Cable/DSL, or download this video clip in MPEG format (2.37 MB).

Sodium Thiosulphate Video No. 2 - As crystallized samples of sodium thiosulphate are slowly heated, the crystallites start to melt and lose their birefringence. Digital videos were captured with polarized illumination at a magnification of 50x with a playing time of 6.2 seconds. Choose a playback format that matches your connection speed: 28.8k (modem), 56.6k (modem), or T1/Cable/DSL, or download this video clip in MPEG format (2.66 MB).

Sodium Thiosulphate is a white, crystalline, water-soluble salt of sodium, used primarily as a photographic fixing agent often referred to (incorrectly) as hypo or hyposulphite. It is also used in the electroplating and tanning industries and widely used in the chemical, pharmaceutical, textile, and paper making industries.