Wondering where to buy citric acid for cleaning or for bath bomb-making? Here are my top places for picking up this staple green cleaning supply.

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As a naturally occurring acid, found in a variety of fruits and vegetables (although increasingly derived from fungus to help meet increasing demand), citric acid is an environmentally friendly cleaning powerhouse that is used in many natural cleaning applications.

Food-safe, easily biodegradable, vegan-friendly, and a renewable product, there is so much to love about citric acid for cleaning.

As well as being a key ingredient when it comes to making bath bombs, citric acid is also fantastic at descaling limescale. Use it to naturally descale your kettle, dishwasher, washing machine, and iron. It’s also incredibly effective at cleaning your toilet. Citric acid’s powers don’t stop there. When you make a citric acid cleaning spray, then it’s great at tackling soap scum and hard water deposits too. And it has de-greasing, anti-fungal, and anti-bacterial properties. In short, citric acid is an eco powerhouse.

However, you might be wondering where to buy citric acid for making these cleaning products? Here are my top places to seek out this wonder ingredient.

Where To Buy Citric Acid for Cleaning & Bath Bomb Making

Image of chopped up lemons on a chopping board, next to a bowl of citric acid, with a blue text box that says where to buy citric acid for cleaning and for bath bomb making.

Citric acid is a common ingredient in home brewing and in Asian cuisine. This means if you have a homebrew shop or an Asian supermarket near you, then you may be able to pick it up locally. If not, then here are my favourite places where you can buy citric acid for cleaning and for bath bomb making online.

My top tip is that if you are in doubt about how often you are going to use citric acid, opt for a smaller amount. You can then work out how quickly you use it, and if it would be more economical for you to buy a bigger pot next time around.

Ethical Superstore

Ethical Superstore sells a 250 g plastic-free box of citric acid for just £2.10*. It is a limited selection. However, I tend to add a box to my basket if I am buying other ethical or sustainable goods. Ethical Superstore also sells other green cleaning ingredients, such as bulk bicarbonate of soda and liquid Castille soap. This makes it a useful place to pick up the cleaning supplies you need.

Buy Citric Acid At &Keep

Like Ethical Superstore, plastic-free retailer &Keep has limited options when it comes to buying citric acid. However, if you are shopping here for other plastic-free and ethical goods, and just need a small amount for general eco-friendly cleaning purposes then I wouldn’t overlook it.

Their citric acid* is plastic-free and unlike the boxes of citric acid that you can buy, this comes in resealable packaging. What’s more, the bag is home compostable once you have used it all up. It comes in a 750 g size, and costs £5.95.

Big Green Smile

Big Green Smile sells a host of green cleaning products, and supplies to make your own cleaning products. As such, citric acid is widely available to buy here*. Find it in 500 g sizes in plastic-free cardboard boxes or paper bags, from just £2.10. And if you need larger quantities, you can buy citric acid in up to 2 kg sizes for less than £25.

Buy Citric Acid on Etsy

Whilst Etsy is the go-to place for items made by crafters, many people forget that it’s also a great place to pick up crafting and cleaning supplies. Indeed, you can pick up citric acid on Etsy*. I’ve found it here in sizes ranging from 100 g to 2 kg. Here prices start from £2.50 up to £16.99 for 2 kg package sizes. Many sellers also offer free postage.

I would say Etsy works out better value for money for buying larger amounts of citric acid for bath bomb making, rather than smaller amounts you might need for general green cleaning.


Whilst I try to avoid Amazon on the grounds of tax avoidance, human rights issues, and environmental issues, I understand that not everyone is able to.

If Amazon is the most accessible option for you, then Amazon does sell citric acid*. Here you can find buy citric acid for cleaning in container sizes ranging from 250 grams for small-scale usage, up to a whopping 25 kg, and every size in between. Whilst it would be unlikely you would need anything above 500 g for cleaning purposes, the larger volumes would be suitable perhaps if you are making bath bombs. Especially if you are planning on making bath bombs on a commercial scale.

How To Store Citric Acid

Citric acid has a long lifespan. When stored in a cool, dry place, then unopened it should last for around five years. Once opened, it should last for around three years. If the citric acid you buy comes in a cardboard box, I recommend decanting this into a labelled airtight jar to help prolong its lifespan.

Looking for more information on citric acid, including how to use it and the safety concerns to consider? I’ve written a post on almost everything you need to know about citric acid, that might be useful reading.

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