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Difference Between Sodium Propionate and Calcium Propionate

July 19, 2020 Posted by Madhu

The key difference between sodium propionate and calcium propionate is that sodium propionate contains a sodium cation bound to the propionate anion, whereas calcium propionate contains a calcium cation bound to two propionate anions.

Sodium propionate and calcium propionate are ionic compounds containing a cation and an anion. These compounds are two different salts of propionic acid. More importantly, both these compounds are important as food preservatives.

CONTENTS

1. Overview and Key Difference
2. What is Sodium Propionate
3. What is Calcium Propionate
4. Similarities Between Sodium Propionate and Calcium Propionate
5. Side by Side Comparison – Sodium Propionate vs Calcium Propionate in Tabular Form
6. Summary

What is Sodium Propionate?

Sodium propionate or sodium propanoate is the sodium salt of propionic acid. The chemical formula of this compound is Na(C2H5COO). It occurs as a white crystalline solid that is deliquescent when exposed to the moist air. The molar mass of this compound is 96 g/mol. It appears as transparent crystals. Moreover, this substance has a faint acetic-butyric odour.

Key Difference - Sodium Propionate vs Calcium Propionate

When considering the production of sodium propionate, we can produce it via the reaction between propionic acid and sodium carbonate. As an alternative, we can use sodium hydroxide instead of sodium carbonate.

There are few uses of sodium propionate – its major application is as a food preservative. The food labelling number for this compound is E 281. In bakery products, this substance is mainly used for mould inhibiting. It is an approved food additive in many countries of the world.

What is Calcium Propionate?

Calcium propionate or calcium propanoate is the calcium salt of propionic acid. The chemical formula of this compound is Ca(C2H5COO)2. It appears as a white crystalline solid, and the molar mass of this compound is 186 g/mol. Calcium propionate is slightly soluble in water and alcohols such as methanol and ethanol. Moreover, this substance is insoluble in acetone and benzene. The crystal structure of this compound is monoclinic.

Key Difference - Sodium Propionate vs Calcium Propionate

There are several uses of calcium propionate. It is mainly used as a food additive. We can list it as E 282. Further, it is an important food preservative. It is useful as a food additive in bread, bakery items, processed meat, whey, and most of the dairy products. Other than that, this substance is important in agriculture to prevent milk fever in cows, as a feed supplement, etc.

What are the Similarities Between Sodium Propionate and Calcium Propionate?

  • Sodium propionate and calcium propionate are two salts of propionic acid.
  • Both these compounds are important as food preservatives.

What is the Difference Between Sodium Propionate and Calcium Propionate?

The key difference between sodium propionate and calcium propionate is that sodium propionate contains a sodium cation bound to the propionate anion, whereas calcium propionate contains a calcium cation bound to two propionate anions. The chemical formula of sodium propionate is Na(C2H5COO), whereas the chemical formula of calcium propionate is Ca(C2H5COO)2.

Moreover, sodium propionate can be produced via the reaction between propionic acid and sodium carbonate while calcium propionate is produced via the reaction between propionic acid and calcium carbonate. When considering the uses of sodium propionate, it is important as a food preservative, food additive, important in bakery products, especially for mould inhibiting. Calcium propionate is useful as a food additive in bread, bakery items, processed meat, whey, and most dairy products.

Below infographic summarizes the differences between sodium propionate and calcium propionate.

Difference Between Sodium Propionate and Calcium Propionate in Tabular Form

Summary – Sodium Propionate vs Calcium Propionate

Sodium propionate and calcium propionate are two different salts of propionic acid. The key difference between sodium propionate and calcium propionate is that sodium propionate contains a sodium cation bound to the propionate anion whereas calcium propionate contains a calcium cation bound to two propionate anions.

Reference:

1.“What Is Calcium Propionate and Is It Vegan?” Ingredi, Available here.

Image Courtesy:

1. “Sodium propanoate” By Edgar181 – Own work (Public Domain) via Commons Wikimedia
2. “Calcium propanoate” By Edgar181 – Own work (Public Domain) via Commons Wikimedia

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Filed Under: Inorganic Chemistry

About the Author: Madhu

Madhu is a graduate in Biological Sciences with BSc (Honours) Degree and currently persuing a Masters Degree in Industrial and Environmental Chemistry. With a mind rooted firmly to basic principals of chemistry and passion for ever evolving field of industrial chemistry, she is keenly interested to be a true companion for those who seek knowledge in the subject of chemistry.

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