藥典: Sodium Metabisulfite(偏亞硫酸氫鈉)

since: 2018/08/06
update: 2018/08/06
reference:
1. The Darkroom Cookbook 4th Edition
2. 焦亞硫酸鈉 - 維基百科，自由的百科全書

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Sodium Metabisulfite(偏亞硫酸氫鈉) (p.216)

Synonyms: Sodium Pyrosulfite
別名：焦亞硫酸鈉(Sodium disulfite), 偏二亞硫酸鈉(Sodium pyrosulfite)

Appearance: Colorless crystals or white powder.
外觀：無色晶體或白色粉末。

Uses: As a preservative in developers; used in place of sodium sulfite in some developers,
particularly in two-solution formulas where the increased acidity of the metabi sulfite inhibits oxidation. For acidifying fixing baths.
用途：作為顯影劑的防腐劑; 在一些顯影劑中用來代替亞硫酸鈉，
特別是在雙溶液配方中，亞硫酸氫鈉的酸度增加會抑制氧化。
用於酸化定影浴。

Notes: Can be substituted weight for weight with sodium bisulfite.
注意事項：可以用亞硫酸氫鈉(重亞硫酸鈉)代替重量。