Walk into any supermarket and you’ll find a familiar white powder sold under two different names depending on which aisle you’re in. Baking soda in the baking aisle, bicarbonate of soda near the cleaning supplies — same compound, different labels, and a world of confusion. This article unpacks exactly what that powder is, whether the names matter, and how to use it safely in the kitchen, bathroom, and around the house.
Chemical formula: NaHCO₃ ·
Common names: baking soda, bicarbonate of soda, bicarb soda, salaratus ·
pH (1% solution): ~8.3 ·
Solubility in water (20 °C): 96 g/L ·
Shelf life (dry): Indefinite
Quick snapshot
- Baking soda and bicarbonate of soda are chemically identical: sodium bicarbonate (NaHCO₃). Encyclopaedia Britannica (science reference)
- Terminology varies regionally — UK/Australia tend to say “bicarbonate of soda,” US says “baking soda.” BBC Good Food (cooking reference)
- Baking soda requires an acid to leaven; baking powder contains its own acid. NC State University (food science department)
- Long-term effects of daily baking soda consumption on inflammation and kidney function remain understudied. Healthline (health information resource)
- Optimal dosage for health benefits without electrolyte disturbance is not established. MedlinePlus (U.S. National Library of Medicine)
- Clinical evidence for baking soda reducing creatinine in chronic kidney disease is limited and not definitive. WebMD (medical information portal)
- Sodium bicarbonate has been listed in the United States Pharmacopeia (USP) at greater than 99% purity since 1848. University of Wisconsin Extension (household-safety research)
- The FDA classifies sodium bicarbonate as Generally Recognized as Safe (GRAS) for food uses. U.S. FDA (federal regulatory body)
- More rigorous human trials are needed to clarify baking soda’s effects on kidney health, inflammation, and athletic performance. Healthline (health information resource)
- Consumer guidance on safe daily intake levels could reduce hospital visits linked to hypernatremia. MedlinePlus (U.S. National Library of Medicine)
Five key identifiers, one clear pattern — sodium bicarbonate is the same chemical everywhere, but its regional names, pH level, solubility, and shelf life differ in practical impact.
| Property | Value |
|---|---|
| Chemical formula | NaHCO₃ |
| Common names | baking soda, bicarbonate of soda, bicarb soda, salaratus |
| pH (1% solution) | ~8.3 |
| Solubility in water (20 °C) | 96 g/L |
| Shelf life (dry) | Indefinite |
Is Baking Soda and Bicarbonate of Soda the Same Thing?
Yes — chemically, they are identical. Both consist of pure sodium bicarbonate (NaHCO₃), a mild alkaline salt. Encyclopaedia Britannica (science reference) confirms that no difference exists at the molecular level. The confusion stems entirely from regional naming conventions: in the UK, Australia, and many Commonwealth countries, the common term is “bicarbonate of soda,” while the US uses “baking soda.” BBC Good Food (cooking reference) notes that British shoppers almost never see a box labelled “baking soda” unless it’s an American import.
What is baking soda called in the UK?
- Bicarbonate of soda (or sometimes “bicarb soda”). BBC Good Food (cooking reference)
- US-style “baking soda” is understood but uncommon in UK supermarkets; Arm & Hammer branding uses “bicarbonate of soda” on shelves in Tesco and Sainsbury’s.
The implication: when a British recipe calls for “bicarbonate of soda,” reach for baking soda if you are in North America — it’s the same ingredient.
Is bicarbonate of soda edible?
- Yes — food-grade sodium bicarbonate is safe for consumption when used in proper amounts. U.S. FDA (federal regulatory body) lists it as GRAS (Generally Recognized as Safe) for food uses.
- Non-food-grade versions (e.g., industrial or cleaning-specific grades) may contain impurities and should not be swallowed.
Can I use bicarbonate of soda instead of baking soda?
- Absolutely — they are the same substance. Substitution by weight is 1:1. Healthline (health information resource) emphasises that both names refer to sodium bicarbonate.
- If a recipe asks for “baking soda” and you have “bicarbonate of soda,” use the same quantity in grams or teaspoons.
The catch: many bakers mistakenly think one is stronger or different, leading to leavening errors. Trust the chemistry, not the label.
The only real difference is geography: one name in the US, another in the UK. For cooking, cleaning, and health uses, the white powder inside the box is identical.
Is It Good to Drink a Teaspoon of Baking Soda Every Day?
This is a popular home remedy, but the evidence and safety warnings demand a closer look. WebMD (medical information portal) acknowledges that baking soda can neutralise stomach acid, but stresses that daily consumption carries risks. MedlinePlus (U.S. National Library of Medicine) specifically warns against using it without medical advice for people on sodium-restricted diets or with kidney disease.
Can baking soda reduce inflammation?
Some small studies suggest sodium bicarbonate may alter inflammatory markers. Healthline (health information resource) reviews evidence that short-term use can reduce pain caused by inflammation, but the long-term effects are unclear. The mechanism is thought to be through increasing alkalinity, which may dampen some immune responses.
Does baking soda reduce creatinine?
Creatinine, a waste product filtered by the kidneys, sometimes decreases when patients take sodium bicarbonate under medical supervision. However, WebMD (medical information portal) notes that the evidence is not strong enough for self-treatment. Patients with chronic kidney disease should only use bicarbonate supplements if their nephrologist prescribes them.
Can I drink baking soda if I have high blood pressure?
- No — baking soda is high in sodium (about 1,260 mg of sodium per teaspoon). MedlinePlus (U.S. National Library of Medicine) advises against its use for people with hypertension or heart failure.
- Excess sodium can raise blood pressure and worsen fluid retention.
When should you not use bicarbonate of soda?
- Avoid if you have hypertension, kidney disease, or are on a low-sodium diet. NCCIH (National Center for Complementary and Integrative Health) flags that antacids containing sodium bicarbonate can cause metabolic alkalosis if overused.
- Do not consume daily without medical supervision — electrolyte disturbances can lead to cardiac arrhythmias.
The trade-off: a single occasional dose for heartburn or indigestion is likely safe for most healthy adults, but daily use is not supported by evidence and carries real risks.
A person with hypertension who drinks baking soda daily risks raising their blood pressure into dangerous territory — the sodium load alone can undo the benefits of many antihypertensive medications.
Can I Brush My Teeth with Bicarbonate of Soda?
Yes, but with significant caveats. Baking soda acts as a mild abrasive that can help remove surface stains from teeth. Healthline (health information resource) notes that the evidence for DIY toothbrushing is limited, and that overuse may damage enamel. WebMD (medical information portal) adds that professional dentist recommendations focus on fluoride toothpaste, not baking soda alone.
- Best used occasionally (once a week or less) to avoid wearing down enamel.
- Mix with a small amount of water to form a paste — do not scrub aggressively.
- For daily cleaning, a toothpaste with fluoride and mild abrasives is safer.
Why this matters: enamel does not regenerate. A few minutes of abrasive brushing every day for years can cause irreversible thinning, sensitivity, and increased cavity risk.
Is Baking Soda the Same as Baking Powder?
No — this is a common mix-up with important consequences. Baking soda is pure sodium bicarbonate. Baking powder contains sodium bicarbonate plus an acid (typically cream of tartar) and a starch to absorb moisture. NC State University (food science department) explains that baking powder is double-acting: it reacts when wet and again when heated, whereas baking soda needs an external acid like buttermilk, vinegar, or lemon juice to produce carbon dioxide.
Can I use baking powder instead of bicarbonate of soda?
- Not directly — because baking powder already contains acid, substituting it for baking soda without recipe adjustments can make baked goods taste bitter or fail to rise properly.
- Conversion rule: for 1 teaspoon of baking soda, use 3–4 teaspoons of baking powder, and reduce or eliminate any other acidic ingredients in the recipe. BBC Good Food (cooking reference) offers this guideline for home cooks.
Baking Soda vs. Baking Powder: What’s the Difference
NC State University (food science department) summarises: baking soda is a single-acting leavener that starts fizzing the moment it contacts moisture and acid; baking powder is double-acting, with a second leap when heat hits. That distinction matters for recipes with long mixing times (like waffle batter) versus quick-baked goods (like cookies).
The pattern: if a recipe already includes buttermilk, yogurt, or brown sugar, it likely calls for baking soda. If the ingredient list has no obvious acid, the recipe probably needs baking powder.
Understanding the differences between baking soda and baking powder is crucial for successful baking. The table below summarises the key contrasts.
| Property | Baking Soda | Baking Powder |
|---|---|---|
| Composition | Pure sodium bicarbonate | Sodium bicarbonate + acid (cream of tartar) + starch |
| How it works | Requires external acid to release CO₂ | Double-acting: reacts when wet and when heated |
| Substitution ratio | 1 tsp baking soda = 3–4 tsp baking powder (adjust acids) | Cannot directly replace without recipe changes |
Home bakers who grab the wrong can turn a fluffy cake into a flat, metallic-tasting disappointment. The safest rule: read the recipe’s leavening instruction twice, then match the can to the written ingredient — not to what you assume the chemical does.
The takeaway: always check the ingredient label before substituting.
Is Bicarbonate of Soda Good for Cleaning?
Yes — and this might be the most popular non-food use. Baking soda is a mild abrasive, effective at scrubbing stuck-on residues without scratching most surfaces. Healthline (health information resource) lists deodorizing carpets, polishing stainless steel, and unclogging drains when combined with vinegar as common applications. University of Wisconsin Extension (household-safety research) describes it as a food-safe cleaner that is safe for septic systems and environmentally friendly compared to many chemical products.
What are the uses of bicarbonate of soda for cleaning?
- Deodorizer: place an open box in the fridge or sprinkle on carpets before vacuuming.
- Scouring powder: mix with a little water to form a paste for sinks, countertops, and ovens.
- Drain cleaner: pour baking soda down the drain, add vinegar, wait 15 minutes, then flush with hot water. Healthline (health information resource) recommends this as a non-toxic alternative to chemical drain openers.
- Laundry booster: half a cup added to the wash cycle can help remove odours and brighten whites.
Is bicarbonate of soda the same as baking soda for cleaning?
Yes — again, they are the same compound. The baking soda you would use in a cake is chemically identical to the bicarbonate of soda you sprinkle on a carpet; there is no separate “cleaning grade” for home-use in the same packaging. However, for heavy-duty cleaning tasks, some brands sell larger boxes that are equally safe and effective.
The upshot: if you already have a box of baking soda in the kitchen, it will work perfectly for cleaning — you do not need a separate product.
Clarity: What We Know and What We Don’t
Confirmed facts
- Baking soda and bicarbonate of soda are chemically identical (sodium bicarbonate). NC State University (food science department)
- Baking soda requires an acid to leaven baked goods; baking powder contains its own acid. NC State University (food science department)
- Drinking baking soda can temporarily neutralise stomach acid. WebMD (medical information portal)
- Baking soda is an effective mild abrasive cleaner and deodorizer. Healthline (health information resource)
- The FDA recognises sodium bicarbonate as GRAS for food uses. U.S. FDA (federal regulatory body)
What’s unclear
- Long-term effects of daily baking soda consumption on inflammation and kidney function are not well studied. Healthline (health information resource) notes limited human trials.
- Optimal dosage for health benefits without side effects (electrolyte disturbances) remains unknown.
- Clinical evidence for baking soda reducing creatinine in chronic kidney disease is inconclusive. WebMD (medical information portal) reports mixed data.
- The ideal frequency of baking soda toothbrushing to minimise enamel wear is not established. Healthline (health information resource) notes that evidence for DIY toothbrushing is limited.
- The effectiveness of baking soda as a drain cleaner compared to commercial products is not quantified. Healthline (health information resource) recommends it as a non-toxic alternative, but comparative data is lacking.
The pattern: while much is known about sodium bicarbonate, key health applications remain under-researched.
“Sodium bicarbonate is sodium bicarbonate — the same chemical compound whether you buy it labelled as baking soda or bicarbonate of soda.” — Encyclopaedia Britannica (science reference)
“Baking soda is not the same as baking powder. Baking soda is pure sodium bicarbonate, while baking powder contains additional acids and a starch.” — NC State University (food science department)
“Sodium bicarbonate should not be used without medical advice in people with kidney disease or those on a low-sodium diet.” — MedlinePlus (U.S. National Library of Medicine)
For the home cook, the kitchen cleaner, and the health-conscious consumer, the choice is clear: the same white powder serves all roles, but only when the right safety boundaries are respected. Use a few grams in a muffin recipe or a paste for your sink, but don’t start a daily soda habit without a doctor’s nod. The simplest advice for the UK and US shopper alike: ignore the label, trust the chemistry, and keep the baking powder can separate.
Frequently asked questions
Can I use baking soda for heartburn?
Yes, occasional use can neutralise stomach acid. Mix 1/2 teaspoon in a glass of water and drink slowly. WebMD (medical information portal) advises limiting use to once daily and only for a few days. If heartburn persists, consult a doctor.
Does baking soda whiten teeth?
It can remove surface stains due to its mild abrasiveness. Healthline (health information resource) notes that it is effective for occasional stain removal but should not replace regular toothpaste because it lacks fluoride.
How much baking soda is safe to consume per day?
Health authorities have not set a specific daily limit. MedlinePlus (U.S. National Library of Medicine) warns that over 1/2 teaspoon daily can cause sodium overload, especially in people with underlying conditions.
Can baking soda lower uric acid?
Some evidence suggests that alkalinising the urine can increase uric acid excretion. However, Healthline (health information resource) rates the evidence as limited and advises against self-treatment for gout.
Is baking soda gluten-free?
Yes, pure sodium bicarbonate is naturally gluten-free. Always check the label for cross-contamination if you require strict gluten avoidance.
Can baking soda remove pesticides from fruits?
Some studies suggest that soaking fruits in a baking soda solution (1 teaspoon per 2 cups of water) for 12–15 minutes can help remove certain pesticides. Healthline (health information resource) notes that rinsing thoroughly afterwards is still necessary.
What is the shelf life of baking soda after opening?
Unopened and stored in a cool, dry place, it lasts indefinitely. Once opened, it absorbs moisture and odours; for best leavening performance, replace every 6–12 months. For cleaning and deodorizing, older boxes still work.
Oliver Hayes is a staff writer for CivicInsight.uk, reporting on news, local government and public services. His work is reviewed by the editorial desk and checked against our sourcing and fact-checking standards before publication.