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Photographers' Formulary Sodium Hydroxide - 1 Lb.

B&H # PHSHLBQ MFR # 10-1270 1LB
Photographers' Formulary Sodium Hydroxide - 1 Lb.

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Synonyms Caustic soda
Caustic soda
Hydrate of soda
Soda lye
Sodic hydrate
Lye
Sodium hydroxide solid
Sodium hydrate
Red Devil Lye
Mineral alkali
Appearance White, deliquescent pellets or flakes
Odorless
Uses High-energy accelerator or alkali sometimes used to activate low-energy developing agents (e.g. hydroquinone).
Caustic alkalies are most often used where a powerful and quick-acting developer is required. Developers compounded with caustic alkali have poor keeping properties and are soon exhausted.
Chemical Formula NaOH
Notes Store in a well-sealed bottle. Weigh it rapidly as it can pick up moisture from the air and change its weight.

Cautions: Of all the chemicals commonly used in the black & white darkroom, this is perhaps the most caustic. It is the same chemical used in many commercial drain cleaners.

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