General Provisions Standard for Manufacturing and
Preparation General Standards for Food
Additive use in Foods Specification and Standards General Test Methods Reagent, Solution, Standard Solution
for Quantitative Analysis and
Standard Solution Appendix
Name
Content
Definition
Description
Identification
Purity
Assay
Permitted Use Level
All
A. Synthetic Additives
B. Natural Additives
C. Mixture Additives
Standard and Specification > Synthetic Additives > Sodium Hypochlorite
232. Sodium Hypochlorite   - Hypochlorite of Soda
Chemical Formula NaClO 
Molecular Weight 74.45 
[Compositional Specifications of Sodium Hypochlorite]
Content Sodium Hypochlorite should be contain not less than 4.0% of available chlorine. 
Description Sodium Hypochlorite is a colorless to light green-yellow liquid having an odor of chlorine.  
Identification (1) When Sodium Hypochlorite is tested by Flame Coloration Test, it shows yellow.

(2) When diluted hydrochloric acid is added to Sodium Hypochlorite, gas is generated.

(3) Dip a red litmus paper in Sodium Hypochlorite. The color of the litmus paper changes to blue, and then fades. 
Purity  
Assay Weigh accurately about 3 g of Sodium Hypochlorite, and add 50 ml of water. Add 2 g of potassium iodine and 10 ml of diluted acetic acid. Titrate the liberated iodine with 0.1 N sodium thiosulfate (indicator : starch solution). Perform a blank test in the same manner, and make any necessary correction.

          0.1 N sodium thiosulfate 1 ml = 3.546 mg of Cl  
Permitted Use Level of Sodium Hypochlorite and Ingredient Containing it Sodium Hypochlorite should not be used with sesame seeds.