What Is Citric Acid Used For in Cleaning?

Citric acid is a handy cleaning product for tackling limescale, hard water marks and everyday build-up around the home. It is usually supplied as a powder and mixed with water when needed. It is most useful in areas where water regularly dries on the surface, such as kettles, taps, shower screens, sinks and toilet bowls.

But what makes it useful for cleaning? In this blog, APC Pure will cover as much ground as possible when it comes to cleaning with Citric Acid.

Why Use Citric Acid for Cleaning?

Firstly it really helps to loosen limescale and hard water marks so they can be wiped or rinsed away more easily. This makes it useful for cleaning jobs where the problem is chalky build-up rather than grease or heavy dirt. It is also very convinient to store, as the powder can be mixed with water when needed which makes it a very useful option. 

Before You Start

Secondly, always test on a small hidden area first, especially on plated finishes, enamel, grout, painted surfaces, treated wood, stone or coloured materials. Some surfaces can react badly to acidic cleaners, even when the cleaner is mild.

Use gloves where appropriate, keep the area ventilated and follow the product label. Keep citric acid away from children and pets during use and storage.

Do not mix cleaning chemicals. Chlorine bleach mixed with acidic products, including citric acid, vinegar or acetic acid, can release harmful gas.

Cleaning Kettles

Kettles often collect limescale inside, especially in hard water areas. Citric acid can help loosen this chalky build-up so it is easier to rinse away.

For kettle descaling, citric acid is usually dissolved in water and left briefly inside the kettle. The kettle should then be rinsed thoroughly before it is used again. Always check the appliance instructions first, as citric acid isn't always compatiable with certain models.

Taps, Sinks and Showers

Taps, sinks and shower fittings can develop dull white marks where water sits or dries. Citric acid can help lift these marks from suitable surfaces.

Use carefully around plated finishes, damaged coatings and older fittings. Do not leave acidic cleaners sitting on the surface for long periods, and rinse well after cleaning.

Drying the area with a clean cloth after rinsing can help reduce new water marks from forming.

Shower Screens and Hard Water Marks

Shower screens often collect hard water marks and soap residue. Citric acid is useful for the chalky mineral part of this build-up.

For best results, remove loose dirt first, apply a citric acid solution, leave briefly, then rinse and wipe dry. A clean dry cloth helps reduce streaks after cleaning.

Avoid using citric acid on surfaces with delicate coatings unless the manufacturer confirms it is suitable.

Toilets and Limescale

Citric acid can help loosen limescale in toilet bowls, especially around the water line where chalky deposits can build up, rinse or flush thoroughly after cleaning. Do not mix it with bleach, toilet cleaner or any other cleaning product.

If a toilet cleaner has already been used, rinse or flush thoroughly before using another product at a later time.

Plugholes and Draining Boards

Citric acid can be used around plugholes, draining boards and sink edges where hard water marks appear. It works best on suitable hard surfaces such as ceramic, glass and stainless steel.

Apply only to the affected area, leave briefly, then rinse thoroughly. Avoid using it on natural stone or delicate finishes.

Tiles and Bathroom Marks

Bathroom tiles can become dull from repeated water exposure in which citric acid can help remove chalky hard water marks from suitable glazed tiles.

Use with care on grout and avoid natural stone tiles such as marble, limestone or travertine. Acidic cleaners can mark or dull these surfaces.

If you are unsure, test first in a small hidden area.

Citric Acid vs Vinegar (Acetic Acid)

Citric acid and vinegar are both used for limescale and hard water marks. The main difference is how they are supplied in which citric acid is usually a dry powder, so it is compact to store and can be mixed with water when needed.

Vinegar is already diluted and has a stronger smell which can be unpleasant as it can stick around for way too long.

What Not to Use Citric Acid On

Citric acid is not suitable for every surface, you should avoid using it on marble, limestone, travertine and other natural stone surfaces, also it should also be used carefully around aluminium, brass, copper, plated metals, unsealed wood, damaged enamel and delicate coatings.

If the surface is expensive, delicate or unknown, use a surface-specific cleaner instead.

Where Citric Acid Works Best

Citric acid works best on limescale, hard water marks and chalky mineral build-up. It is less useful for grease, oil, thick grime or sticky residue. For greasy marks, a different cleaner may be more suitable. Matching the cleaner to the type of mark helps avoid wasted effort and reduces the risk of damaging the surface.

Safe Cleaning Reminder

Use citric acid on its own and do not mix it with other cleaning chemicals. This includes bleach, toilet cleaner, ammonia-based cleaners and other descaling products.

Keep the product in its original labelled container, avoid breathing in powder dust when mixing, and rinse cleaned surfaces thoroughly after use.

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