Bicarbonate of Soda vs Baking Soda – Key Differences Explained

Bicarbonate of soda and baking soda are the same chemical compound, but the names vary by region. This article explains the differences between bicarbonate of soda, baking soda, and baking powder, and covers their uses in cooking, cleaning, and skin care.

If you have ever stood in the baking aisle wondering whether the box labelled “bicarbonate of soda” is the same as the box labelled “baking soda”, you are not alone. The confusion is understandable because the two names are often used interchangeably in recipes and household tips. Yet the answer is straightforward: they are chemically identical. The difference is purely a matter of geography. For more on how these ingredients work in everyday cooking, explore our baking basics guide.

Understanding this identity is only the first step. Many people also confuse bicarbonate of soda with baking powder, and the consequences of swapping them without adjusting a recipe can be disappointing. This article provides a side‑by‑side comparison, practical substitution ratios, and guidance on cleaning and edible uses based on reliable sources.

Are Bicarbonate of Soda and Baking Soda the Same Thing?

Yes. Bicarbonate of soda (the term mostly used in the UK and Commonwealth countries) and baking soda (the common US term) are both sodium bicarbonate, a chemical compound with the formula NaHCO₃. The naming difference is regional; the substance itself is identical.

Key Insights

• Bicarbonate of soda and baking soda are chemically identical (sodium bicarbonate). The different names are regional (UK/Australia vs US).
• Baking powder contains baking soda plus a dry acid; it is a complete leavening system that does not require additional acidic ingredients.
• When substituting baking soda for baking powder or vice versa, you must adjust acidity in the recipe.
• In cleaning, sodium bicarbonate acts as a mild alkali, good for deodorising and scrubbing without harsh chemicals.
• For skin, it can be used in baths or as a gentle exfoliant, but alkaline nature may irritate sensitive skin.
• Understanding both cooking and non-cooking uses helps you get the most out of this versatile ingredient.

Quick Reference Table: Bicarbonate of Soda vs Baking Soda vs Baking Powder

Is Bicarbonate of Soda the Same as Baking Powder?

No. Baking powder is a different product. Bicarbonate of soda (also called baking soda or sodium bicarbonate) is a pure compound. Baking powder is a mixture that contains sodium bicarbonate plus one or more acidic ingredients — commonly cream of tartar — and a filler such as cornflour. The acid is already included so that baking powder will produce carbon dioxide when moistened or heated, depending on the type. Wikipedia provides comprehensive chemical data on sodium bicarbonate and its reactions.

In practical terms, bicarbonate of soda needs an acidic ingredient (yogurt, lemon juice, vinegar, buttermilk) to react and leaven a batter or dough. Baking powder does not require additional acid because the reaction is built in. This is why they are not interchangeable without recipe changes.

Understanding this distinction prevents many baking mishaps. Too much bicarbonate of soda can make baked goods taste bitter and may cause cakes to rise and then collapse. World of Spice and My Wellbeing Journal both offer practical guidance on getting the ratios right.

What Are the Main Uses of Bicarbonate of Soda?

Sodium bicarbonate has a wide range of applications beyond the kitchen. It is used in cleaning, skin care, and as a mild antacid. The following subsections cover the most common uses.

Can Bicarbonate of Soda Be Used for Cleaning?

Yes. According to smol.com, bicarbonate of soda is a gentle cleaner, deodoriser, and mild abrasive. It can be used on fridges, shower trays, kettles, soap scum, limescale, and grime. When mixed with an acid such as vinegar or lemon juice, it produces a fizzing action that can help loosen dirt.

The same source notes that bicarbonate of soda is gentler than soda crystals, which are stronger and better for heavy-duty cleaning. However, it is not ideal for glass or aluminium surfaces and can dry out skin, so wearing gloves is recommended. For more natural cleaning methods, see our eco-friendly cleaning tips.

Can Bicarbonate of Soda Be Used on Skin?

The available research does not strongly support bicarbonate of soda as a dedicated skin‑care ingredient. The only directly relevant note from the sources is a caution that it can dry out your skin during cleaning, which is why gloves are advised. Claims about treating acne, eczema, or using it as an exfoliant are largely anecdotal and are not backed by the evidence reviewed here. Healthline reviews the evidence for skin usage and suggests caution due to its alkaline nature.

If you are considering using sodium bicarbonate on your skin for irritation, exfoliation, or deodorising, it is advisable to consult a dermatologist. The alkaline nature (pH around 8.3) can disrupt the skin’s natural barrier, especially for sensitive skin types.

Is Bicarbonate of Soda Edible?

Yes. Sodium bicarbonate is edible in normal food amounts and is widely used in baking as a leavening agent. It appears on the FDA’s Generally Recognized as Safe (GRAS) list. In recipes that contain acidic ingredients, it reacts to produce carbon dioxide, which helps dough and batter rise.

However, using too much can leave an unpleasant alkaline or bitter taste and may affect the texture of baked goods. In large quantities, it can cause stomach upset or electrolyte imbalance. The amounts used in standard baking — typically ¼ to 1 teaspoon per recipe — are considered safe.

A Brief History of Baking Soda and Bicarbonate of Soda

The commercial production of sodium bicarbonate began in the mid‑19th century. A timeline of key milestones helps illustrate how this simple compound became a household staple.

1. 1846 – Two New York bakers, John Dwight and Austin Church, set up the first factory to produce baking soda from sodium carbonate and carbon dioxide.
2. Early 20th century – Baking powder becomes widely commercialised; different regional names solidify (bicarbonate of soda in the UK, baking soda in the US). BBC Good Food clarifies the naming conventions for UK readers.
3. Present – Sodium bicarbonate remains a staple in kitchens, cleaning products, and personal care, often marketed under different names.

What Do We Know for Sure About Baking Soda and Bicarbonate of Soda?

Based on the available evidence, the following points are well established, while others remain unclear or depend on context.

Why Do the Names Differ and What Does It Mean Chemically?

Sodium bicarbonate (NaHCO₃) is a white crystalline powder that reacts with acids to produce carbon dioxide gas. In baking, this reaction causes dough to rise. Its alkaline nature (pH ~8.3) also makes it useful for neutralising odours and cutting grease.

Baking powder is simply baking soda pre‑mixed with a dry acid (e.g., cream of tartar, monocalcium phosphate). It may also contain cornstarch to absorb moisture. Because it already contains acid, it reacts when wet and again when heated (double‑acting). The Kitchn provides a detailed substitution guide for home bakers.

The term “bicarbonate of soda” is an older chemical name still used in the UK and Commonwealth countries. “Baking soda” is the common US name. Both refer to the same product sold in stores. Understanding these differences prevents recipe failures and allows safe substitution.

Where Can I Find Reliable Information on Bicarbonates?

Several authoritative sources provide chemical data and practical guidance. The Wikipedia article on sodium bicarbonate offers comprehensive chemical data and history. BBC Good Food clarifies the naming for UK readers. Healthline reviews the evidence for skin usage, and The Kitchn provides a detailed substitution guide. The FDA’s GRAS notice confirms the safety of sodium bicarbonate in food.

For cleaning applications, smol.com offers a dedicated article that explains the strengths and limitations of bicarbonate of soda. The World of Spice blog and My Wellbeing Journal articles are also useful for understanding the differences between the various products.

So, Is There Any Difference Between Bicarbonate of Soda and Baking Soda?

No. Bicarbonate of soda and baking soda are the same substance: sodium bicarbonate. The only difference is the name, which varies by region. The real distinction you need to remember is between sodium bicarbonate and baking powder. If you keep that separation in mind, you will avoid common baking mistakes and use each product effectively in cooking, cleaning, and other household tasks.

Frequently Asked Questions About Bicarbonate of Soda and Baking Soda