Bicarbonate of Soda and Hydrogen Peroxide Paste for Household Cleaning

A bicarbonate of soda and hydrogen peroxide paste is used in household cleaning to loosen stuck-on deposits and lighten certain stains. Bicarbonate of soda provides gentle abrasion, while hydrogen peroxide works as an oxidising agent. This combination can be useful on grout, sanitary ware and white items, but it should always be tested first to prevent fading or scratching the material.

What happens when bicarbonate of soda and hydrogen peroxide are mixed?

Bicarbonate of soda creates a grainy alkaline base that improves contact with dirt while scrubbing. Hydrogen peroxide, meanwhile, may oxidise certain pigments and organic residues, helping to brighten durable surfaces. The most common household solution has a 3% concentration, also labelled as 10-volume peroxide.

Bubbles form as the peroxide begins to break down and release oxygen. Although this fizzing may help lift surface deposits, it does not by itself prove that the area has been disinfected. Because an alkaline environment can speed up decomposition, the paste should be mixed only when needed rather than stored for later cleaning.

Why has this paste become popular for household cleaning?

Its thick texture allows the ingredients to stay on grout lines, corners and vertical surfaces for several minutes. The mixture also combines two effects in one application:

• Bicarbonate of soda helps remove dirt mechanically;
• Hydrogen peroxide may lighten stains caused by organic matter;
• The paste stays in place for longer where it is applied;
• Its texture can reach into gaps with the help of a soft brush;
• Both ingredients are readily available from pharmacies and supermarkets.

Which surfaces is the mixture commonly used on?

Its best-known use is on grimy grout in ceramic-tiled floors and walls. The paste can also be tested on white sanitary ware, tiles, porcelain sinks and white trainer soles, provided that the finish and the manufacturer’s instructions are respected.

On stainless-steel items, scrub in the direction of the finish and without pressure, as the grains can leave marks. For trainers, use the product only on hard-wearing white sections, avoiding coloured fabrics, leather, suede and glued areas that may become discoloured.

How can bicarbonate of soda and hydrogen peroxide paste be applied without damaging the material?

Gradually add a small amount of 3% hydrogen peroxide to bicarbonate of soda until it makes a firm paste. Safe use depends more on testing and gentle application than on vigorous scrubbing:

• First test it on a concealed area;
• Wear gloves and keep the space well ventilated;
• Apply the paste only to a cool surface;
• Leave it for a few minutes, without allowing it to dry completely;
• Scrub with a soft brush or a non-abrasive cloth;
• Rinse thoroughly and dry well after cleaning;
• Do not keep leftovers in sealed containers.

Which surfaces and combinations should be avoided?

The mixture is unsuitable for marble, polished natural stone, unprotected wood, aluminium, painted surfaces, delicate finishes or coloured materials. Both its oxidising action and its abrasiveness can lead to uneven lightening, loss of shine, wear to protective coatings or visible scratches.

The cleaning paste must also not be mixed with bleach, ammonia, vinegar or any other products. Preparing it separately with low-concentration hydrogen peroxide and using it immediately reduces risks, while allowing this bicarbonate of soda and peroxide household-cleaning method to be used without compromising sensitive surfaces.