Sodium Bicarbonate in Effervescent Tablets and Beverage Powders

Sodium bicarbonate is the classic source of fizz in effervescent tablets and beverage powders. Together with a food acid it releases carbon dioxide as soon as the product meets water. For formulators and buyers, the challenge is to keep this reaction under control until the consumer drops the tablet into a glass. This guide explains how sodium bicarbonate works in effervescent products, which quality parameters matter and how to handle the raw material in production.

How the effervescent reaction works

An effervescent system has two parts: a base, usually sodium bicarbonate (E500(ii)), and a food acid such as citric acid. In dry form, the two ingredients do not react. When the tablet or powder is added to water, the acid and the bicarbonate dissolve and react with each other. Carbon dioxide is released as bubbles, which break up the tablet and help the ingredients disperse quickly.

The same reaction can start too early if the product is exposed to moisture during production or storage. Moisture control is therefore the most important topic in effervescent manufacturing.

Typical applications of sodium bicarbonate in effervescent products

• Effervescent tablets: vitamin, mineral and electrolyte tablets for food supplements.
• Beverage powders: instant drinks and sachets that fizz when mixed with water.
• Confectionery: sherbet powders and fizzy sweets.
• Bakery: as a leavening agent in combination with leavening acids.

Quality parameters to check

Always compare the specification with the Certificate of Analysis (CoA) of each batch. Our guide to the maltodextrin specification and CoA explains the same approach for another key raw material.

Formulation tips

• Choose the acid-to-bicarbonate ratio based on the assay of both raw materials and the desired taste.
• Use a particle size that matches the other ingredients to avoid separation in the blend.
• Consider a carrier such as maltodextrin or dried glucose syrup for flavours and fine ingredients.
• Run test batches under real production conditions before scaling up.

Handling and storage

Effervescent production takes place under low relative humidity. Keep sodium bicarbonate in its original, tightly closed bags in a cool, dry place, and open only as many bags as you need. Close opened bags immediately and avoid storing them next to acids. Finished tablets are usually packed in moisture-proof tubes or blisters.

Checklist for buyers

• Food grade sodium bicarbonate E500(ii) with a current specification
• CoA for every batch
• Safety Data Sheet (SDS)
• Particle size suitable for your process
• Packaging that protects against moisture
• A sample for a trial batch

FAQ

Why do effervescent tablets sometimes swell or lose their fizz?

In most cases, moisture has started the reaction between acid and bicarbonate too early. Check the humidity in production, the moisture content of the raw materials and the tightness of the packaging.

Which acid is used with sodium bicarbonate?

Citric acid is the most common choice. Other food acids such as malic or tartaric acid are also used, depending on taste and the desired reaction speed.

In which packaging do you supply sodium bicarbonate?

biolla chemicals supplies food grade sodium bicarbonate in 25 kg bags.

Sodium bicarbonate from biolla chemicals

biolla chemicals supplies food grade sodium bicarbonate E500(ii) (CAS 144-55-8) in 25 kg bags to manufacturers across Europe. Specification, CoA, SDS and samples are available on request, and we deliver from Hamburg.

See all details on our product page: Sodium Bicarbonate CAS 144-55-8

Related articles:

• Sodium Bicarbonate in Bakery: Leavening Acids, Particle Size and Quality
• Maltodextrin Specification and CoA: What Buyers Should Check

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