• Washing Soda (sodium carbonate) and percarbonate in bags with items to make dishwasher tablets
  • Washing Soda (sodium carbonate) being poured into sink for drain cleaner
  • washing soda (sodium carbonate) powder in a bowl
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Washing Soda

Washing Soda

$7.50
$7.50
Sale Sold Out

Cuts grease, softens water, and helps every cleaner work harder.

Washing Soda (sodium carbonate) is one of the most common ingredients in commercial cleaning products and a key base for handmade cleaning powders and pastes. 

  • Lifts grease and dirt from surfaces
  • Improves the performance of soaps
  • Naturally softens hard water
  • Concentrated and cost effective

PRODUCT DETAILS

What it is
Washing soda is also known as sodium carbonate, and sometimes soda ash. It's a white granular powder with a slightly gritty texture, noticeably different from the fine, silky feel of bicarb soda. It occurs naturally as a mineral and has been mined and used by humans for thousands of years.

How you can use it
Washing Soda can be used in the following DIY recipes

✅ Suitable for
• Most washable fabrics
• Ceramic and porcelain surfaces
• Grout and tiles
• Stainless steel
• Many hard household surfaces

❎ Avoid using on
• Delicate items like wool, silk and leather
• Non dishwasher safe items and aluminium
• Waxed or polished surfaces

🫙 Storage
Store sealed in a cool, dry place to keep moisture out.

📦 Packaging
Available in home compostable Earth Bags or reusable glass Apothecary Jars (750ml size). The earth bags are plastic free way to get the goods to you but not ideal long term storage.

⚠️ Safety
Like all cleaning products, you need to keep stored well away from children and pets. This is not for food or any form of consumption, can be dangerous if consumed.

HANDY RESOURCES

Go deeper
Learn more about this amazing ingredient including the chemistry of how it works. You may also like to read The Crystals Behind DIY Cleaning to learn more about the magic of washing soda.

Two important links
The Recipe Hub shows you what commercial cleaning products you can replace, with step-by-step details on how to do it.

The Learning Hub deep dives into the ingredients, looking at what each one is and why it works.

FULL GREEN ETHOS

At Under Your Sink, our green ethos runs through everything, from what we source to how it’s packaged.

We choose simple, effective ingredients that are biodegradable, vegan-friendly, cruelty-free, ethically sourced and septic safe. Our plastic-free packaging options, including home compostable Earth Bags and refillable Apothecary Jars, help reduce waste without compromising on quality.

Fewer ingredients. Less waste. Better cleaning. All the important boxes ticked.

View full details

You don't need more cleaning products. You need the right ingredients.

All the resources, ingredients and tools you need are here on the website!

  • The Recipe Hub

    WHAT TO MAKE
    Step-by-step recipes organised around the supermarket products you already know. Find the product, make the swap.

    See what you can replace 

  • The Learning Hub

    WHY IT WORKS
    Plain-language deep dives into each
    ingredient: what it is, where it comes from, and why it earns its place under your sink.

    Meet the ingredients