Sodium diacetate 

Manufacturer product code:SDA 
Molecular formula:C4H7O4Na xH2O 
E Number:E262 
CAS number:126-96-5 
Colour:white 
Form:fine powder 
Odour:vinegar 
Decomposition:if heated above 150 C 

Typical analysis: 
Free acetic acid  39.0-41.0  % drybase 
Sodium acetate    58.0-60.0  %dry base 
Moisture          2          <% 
pH                4.5-5.0    10%aqueous solution 
Arsenic          1          <mg / kg 
Heavy metals asPb1          <mg / kg