1 The Draft  Amendment of Standard s for Specification, Scope , Application 
and Limitation  of Food Additive s 
   MOWH  Food No. 1031300683 , 10 April , 201 4 
Appendix 2: Standards for Specification of Food Additives  
06. Leavening Agents  
§ 06001  
Aluminum Potassium Sul fate 
Synonyms  
 Potassium alum; potash alum; Burnt alum 
(Anhydr ous); INS No. 522  
Definition  
 
Chemical fomula  
Molecular weight  
 
Assay:  CAS No.  10043 -67-1 (Anhydrous)  
7784 -24-9 (Dodecahydrate)  
AlK(SO 4)2•xH 2O (x = 0 or 12)  
258.21(Anhydrous)  
474.38 (Dodecahydra te) 
Anhydrous  form: not less than 96.5%  
Dodecahydrate form: not less than 99.5%  
Description  Transparent crystals or white crystalline powder  
Solubility  Soluble in water, insoluble in e thanol  
Identification  
pH Passes tests for aluminium, potassium and s ulphate  
3.0~4.0 (10% solution)  
Ammonium salts  Heat 1 g of the sample with 10 ml of sodium  
hydroxide TS on a steam bath for 1 min. The odour 
of ammonia is not perceptible . 
Fluoride  Not more than 30 mg/kg  
Lead  Not more than 5 mg/kg  
Selenium  Not more than  30 mg/kg  
Category  Food additives category ( 6) 
Functional uses  Leavening Agents  
  2 § 06002   
 
 Aluminum Sodium  Sulfate  
Synonyms  
 Sodium alum; Soda alum; INS No. 521  
Definition  
 
Chemical fomula  
Molecular weight  
 
Assay  CAS No.  10102 -71-3 (Anhydrous)  
7789 -28-3 (Dodecahydrate)  
AlNa(SO 4)2•xH 2O (x = 0 or 12)  
242.09(Anhydrous)  
458.29 (Dodecahydrate)  
Anhydrous  form: not less than 96.5%  
Dodecahydrate form: not less than 99.5%  
Description  Transparent crystals, white crystals or white powder  
Solubility  Soluble in  water, insoluble in e thanol  
Identification  Passes tests for alumin ium, sodium  and sulphate  
Ammonium salts  Heat 1 g of the sample with 10 ml of sodium 
hydroxide TS on a steam bath for 1 min. The odour 
of ammonia is not perceptible.  
Fluoride  Not more tha n 30 mg/kg  
Lead  Not more than 5 mg/kg  
Selenium  Not more than 30 mg/kg  
Arsenic  Not more than 3 mg/kg  
Mercury  Not more than 1 mg/kg  
Loss on drying  Not more than 47.2% (Dodecahydrate)  
Not more than 10% (Anhydrous)  
Category  Food additives category ( 6) 
Functional uses  Leavening Agents  
  
  3 § 0600 4  
 
 Aluminum Ammonium  Sulfate  
Synonyms  
 Ammonium alum; Soda alum; INS No. 523  
Definition  
Chemical fomula  
Molecular weight  
 
Assay  CAS No.  7784 -25-0 (Dodecahydrate)  
AlNH 4(SO 4)2•xH 2O (x = 0 or 12)  
237.15(Anhydrou s) 
453.32 (Dodecahydrate)  
Anhydrous  form: not less than 96.5%  
Dodecahydrate form: not less than 99.5%  
Description  Transparent crystals, white granules  or white powder; 
odorless  
Solubility  Soluble in water, insoluble in ethanol  
Identification  Passes test s for aluminium, ammonium and sulphate  
Ammonium salts  No odor of ammonia after adding 1 gram sample in 
10 mL NaOH solution and steam heating for 1min.  
Fluoride  Not more than 30 mg/kg  
Alkali metals and 
alkaline earths  Completely precipitate the aluminium  from a boiling 
Solution of 1 g of the sample in 100 ml of water by 
the addition of enough ammonia TS to render the 
solution distinctly alkaline to methyl red TS, and 
filter. Evaporate the filtrate to dryness, and ignite. 
The weight of the residue does not  exceed 5 mg.  
Lead  Not more than 3 mg/kg  
Selenium  Not more than 30 mg/kg  
Category  Food additives category ( 6) 
Functional uses  Leavening Agents  
   4 § 06013 
 
 Sodium  Aluminum  Phosphate, Acidic  
Chemical fomula  
 
Molecular weight  
 
Assay  NaAl 3H14PO 4•4H 2O or 
Na3Al2H15(PO 4)8 
NaAl 3H14PO 4•4H 2O: 949.88  
Na3Al2H15(PO 4)8: 897.82  
Not less than 95% of NaAl 3H14(PO 4)8 ·  4H 2O or not 
less than 95% of Na 3Al2H15(PO 4)8 
Description  White , odorless powder  
Solubility  Insoluble in water.  Soluble in hydrochloric acid  
Identifi cation  Passes tests for aluminium, sodium  and phosphate  
Test a 1 in 10 solution in dilute hydrochloric acid  
Fluoride  Not more than 25 mg/kg  
Lead  Not more than 2 mg/kg  
Arsenic  Not more than 3 mg/kg  
Loss on ignition  NaAl 3H14(PO 4)8 ·  4H 2O: 19.5 - 21% (750 -800℃, 2 h)  
Na3Al2H15(PO 4)8 : 15 - 16% (750 -800℃, 2 h)  
Category  Food additives category ( 6) 
Functional uses  Leavening Agents