Definitions
Century Dictionary and Cyclopedia
- n. A salt of hyposulphurous acid (H2SO2). Sodium hyposulphite, (hyposulphite of soda) is the commercial name for sodium thiosulphite, a salt of thiosulphurous acid (H2S2O3), which is used by dyers for reducing indigo, and generally in the arts as a reducing or deoxidizing agent—notably in photography, as the usual chemical for fixing plates and prints.
Wiktionary
- n. alternative spelling of hyposulfite.
GNU Webster's 1913
- n. obsolete A salt of what was formerly called hyposulphurous acid; a thiosulphate.
- n. A salt of hyposulphurous acid proper.
Examples
“The formula of this substance is NaHSO_ {2}, as distinguished from what is commonly known as hyposulphite of soda,”
“Suggested the use of a pad soaked in hyposulphite of soda to protect the men, and suggested that the enemy probably already had one designed that might be obtained if search were made on the field.”
“hyposulphite," "phosphate," and "affinity," were enough to convince even the most sceptical that Dr Skinner had a profound knowledge of chemistry.”
“Heat was used to bring up a latent image, then the image was permanently "fixed" to the plate by dipping it in a hyposulphite of soda.”
“In lieu of common salt, 15 parts of hyposulphite of soda, or other hygroscopic salt, such as chloride of calcium, may be employed.”
“He then adds 8 drops of sodium hyposulphite at 33° B., and 1 c.c. of a solution of magenta, 1 decigrm. per liter.”
“The zinc may be supposed to remove oxygen from the acid sulphite, NaHSO_ {3}, giving hyposulphite, NaHS0_ {2}.”
“The process depends on the reduction of indigo to indigo-white, or soluble indigo, by means of hyposulphite, or, as it is generally termed to avoid confusion with antichlore, rightly named thiosulphate of soda, hydrosulphite of soda.”
“This is a solution of hyposulphite of soda, a chemical which is used in development and which renders the plate no longer sensitive to light, but dissolves that part which has not been acted upon by the developer.”
“~Sodium thiosulphate~ (_hyposulphite of soda or "hypo" _) (Na_ {2} S_ {2} O_ {3} ·5H_ {2} O).”
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