Preparation and identification method of calcium propionate
It is prepared by the reaction of propionic acid with calcium hydroxide or calcium carbonate;
In industry, calcium hydroxide is generally used as raw material. Calcium hydroxide is adjusted into a suspension in a reaction pot, and propionic acid is added. The reaction temperature is maintained at 70-100℃, and the reaction is carried out for 2-3 hours. The pH value at the end of the reaction is controlled at 7-8. The reaction material is filtered and dried to obtain the finished product.
(1) Take 5mL of the sample solution (1+10) and heat it with 5mL of dilute sulfuric acid (1+9). It releases a special propionic acid smell.
(2) Dip the sample with a platinum wire moistened with hydrochloric acid, and it will turn red (brick red) in a colorless flame.
SNOWHITE CHEM is one of the largest companies in China that provide propionic acid. We have food grade, feed grade and industrial grade calcium propionate. Please feel free to contact us.