Sodium Chlorite Solutions, Acidified

Acid Calcium Phosphate, 68, (Sl)9, (S2)4 Acid Ferric Sulfate TS, 852 Acid Hydrolysates of Proteins, 13, (Sl)l Acid-Hydrolyzed Milk Protein, 13, (Sl)l Acid-Hydrolyzed Proteins, 13, (Sl)l Acidified Sodium Chlorite Solutions, (S3)3... 

Nabar and co-workers (161) studied the photodecom-position of sodium chlorite solutions. They found that the extent of photodecomposition decreased with an increase in pH and an increase in the initial sodium chlorite concentration. Chloride ion had no effect on the photodecomposition reaction. The photodecomposition reaction was found to be much more rapid than the decomposition of acidified sodium chlorite solutions. For example, a chlorous acid solution that decomposed 2.5% in the dark in 3 hr decoit osed 100% in 1 hr in the presence of a carbon arc. Equations 48 and 49 qualitatively represent the stoichiometry found at pH 4.0 and 8.43, respectively... 

Soak the fiber five times in acidified sodium chlorite solution (pH 4-5) at 75 °C for an hour... 

Delignification using an acidified sodium chlorite solution at 7SX for 1 h and repeated four to five times until products became white. 

Acidified Sodium Chlorite (ASC) Solutions occur as clear, colorless to pale-yellow liquids. The ASC Solutions are equilibrium mixtures of sodium chlorite (NaC102) and chlorous acid (HC102). ASC Solutions are produced by lowering the... 

In many patent orHterature descriptions, a stabilized chlorine dioxide solution or component is used or described. These stabilized chlorine dioxide solutions are in actuaHty a near neutral pH solution of sodium chlorite that may contain buffer salts or additives to obtain chlorite stabiHty in the pH 6—10 range. The uv spectra of these solutions is identical to that of sodium chlorite. These pH adjusted chlorite solutions can produce the active chlorine dioxide disinfectant from a number of possible organic or inorganic chemical and microbiological reactions that react, acidify, or catalyze the chlorite ion. 

Sodium chlorite is not a bleaching agent and must be acidified in order that chlorine dioxide can be liberated, which in acidic solutions can undergo the following reactions ... 

The rate of disproportionation of acidified chlorine (III) solutions varies with the pH. The reaction is very slow at a pH greater than 4 less than 10 W chlorine dioxide is formed in 2 hr if the initial sodium chlorite concentration (28) is 3 x 10 Only if the pH is less than 3 will more than 1% of the sodium chlorite decompose within 10 min. Kieffer and Gordon (120) found that the rate of decomposition of chlorous acid did not vary appreciably with hydrogen ion concentration in the 2.0 to 0.2M range in the absence of initial chloride ion. The half-life for the decoitpos-ition was approximately 3 hr for 1.2M hydrogen ion,... 

Under normal conditions, solutions of sodium (and other) chlorites when acidified do not evolve chlorine dioxide in dangerous amounts. However, explosive concentrations may result if acid is dropped onto solid chlorites. 

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