Sodium thiosulfate is one of the few know substances that will dissolve silver bromide. As such it is universally used in modern photographic procedures.

In this process known as "fixation," the unexposed silver bromide is dissolved in the sodium thiosulfate by combining with it to form soluble complex thiosulfates of silver and sodium.

UPC: 675152137111

Photographer ' Formulary 10-1371 5LB Specs

Synonyms	Antichlor Hypo Hyposulfite of soda Sodium hyposulfite Sodium subsulfite Sodium thiosulfate, pentahydrate Thiosulfuric acid, disodium salt, pentahydrate
Appearance	Large white monoclinic, colorless crystals and powder Odorless
Uses	In preparation of fixing baths Ingredient in various reducers
Chemical Formula	Na₂S₂O₃.5H₂O
Notes	Hypo is available in two forms: anhydrous and, more commonly crystalline. Crystalline hypo, when dissolved, lowers the temperature of the water considerably, whereas anhydrous does not. Always begin with water of at least 90°F/32°C when mixing the crystalline form. Use 64% of the anhydrous salt as a substitute for crystalline hypo.

Packaging Info

Package Weight	5.27 lb
Box Dimensions (LxWxH)	7.15 x 5 x 4.9"

Photographer ' Formulary 10-1371 5LB Reviews

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Photographers' Formulary Sodium Thiosulfate, Anhydrous - 5 Lbs.

Photographer ' Formulary 10-1371 5LB Overview

Photographer ' Formulary 10-1371 5LB Specs

Photographer ' Formulary 10-1371 5LB Reviews

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