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How to Make Washing Soda from Baking Soda

January 18, 2016 by Katie Wells
How to make washing soda from baking soda
Table of Contents[Hide][Show]
  • What is Washing Soda?
  • Where to Get Washing Soda?
  • How to Make Washing Soda+−
    • Washing Soda Ingredients
    • Washing Soda Instructions

I’ve been using washing soda (also called sodium carbonate) in my natural cleaning for years. It is an ingredient in my homemade laundry soap and all-purpose cleaners and I’ve found dozens of other ways to use it around the house as well.

What is Washing Soda?

Sodium Carbonate, commonly called Washing Soda or Soda Ash, is a water-soluble sodium salt of carbonic acid. Its proportions of sodium, carbon and oxygen make it effective as a natural cleaner and cleaning booster.

It can be obtained from natural sources like the ashes of plants that grew in certain types of soil or created synthetically. It has a fascinating history of use in glass making, film developing, taxidermy, cooking and chemistry but I am most fond of it for its simple household uses.

Where to Get Washing Soda?

Even in our relatively small town, washing soda is easy to find on the laundry aisle of the grocery store and it is also available in boxes and in bulk online. I’ve always just purchased it because it is so inexpensive and versatile and easy to find.

I’ve gotten many comments from readers who don’t live in the US or who live in very rural areas asking if there is a substitute if they can’t find it in their area and a few other readers chimed in that they’ve been able to make it at home from baking soda (sodium bicarbonate) which seems to be available practically everywhere.

The best part?

The process of turning sodium bicarbonate into sodium carbonate is a simple chemical reaction that can be easily accomplished in an oven!

In short, using enough heat for a long enough period of time will change the structure of sodium bicarbonate into sodium carbonate while releasing excess carbon dioxide and steam.Bonus points if you try this simple method and turn it into a science lesson for your kids at the same time!

How to Make Washing Soda

If you have an oven and are feeling crafty, try this simple method of making washing soda. Another bonus is that baking soda is typically even less expensive (especially at big box stores) and making this at home can help further reduce the cost of budget-friendly cleaning recipes.

Washing Soda Ingredients

  • Baking Soda
  • A large baking dish or baking sheet (I use these stainless steel restaurant pans for this and all of my baking and cooking)
  • An Oven
  • Patience (and not even very much!)

Washing Soda Instructions

  1. Turn oven on 400 degrees F.
  2. Pour a thick (1/2 inch or so) layer of baking soda on the bottom of the baking dish.
  3. Bake for 1 hour, stirring 1-2 times in the middle,  or until it has changed in look and feel. Baking soda has a silky/powdery feel and washing soda is more grainy and not silky. The baking soda will need to reach the full 400 degrees for this reaction to take place, so give it time.
  4. Let cool and store in air-tight jar.

Use this homemade washing soda as you would store-bought in natural cleaning recipes, laundry soaps and more!

Ever tried to make Washing Soda at home? Many thanks to reader Erin for the email with the tip on how to make it!

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Category: Natural Home

About Katie Wells

Katie Wells, CTNC, MCHC, Founder and CEO of Wellness Mama and Co-Founder of Wellnesse, has a background in research, journalism, and nutrition. As a wife and mom of six, she turned to research and took health into her own hands to find answers to her health problems. WellnessMama.com is the culmination of her thousands of hours of research and all posts are medically reviewed and verified by the Wellness Mama research team. Katie is also the author of the bestselling books The Wellness Mama Cookbook and The Wellness Mama 5-Step Lifestyle Detox.

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Reader Interactions

Discussion (24 Comments)

  1. Jenn

    April 17, 2016 at 6:44 AM

    Hi there and thanks for the great info (now I can stop ordering in bulk and just make it!!) – I have a question about the chemical reaction of sodium carbonate with water – wondering if the “cleaning” properties of washing soda change if I try to use it in a liquid laundry soap formula? I’ve been making powder for years – but with the breakdown of the old machine comes a need to try a liquid formula. I know sodium percarbonate cannot go into a liquid formula because the cleaning has to happen immediately when it chemical reacts with water, but not sure about sodium carbonate (aka washing soda)…. oh, and do either baking soda or washing soda truly dissolve in water? I know I’m a few months late to the conversation, but hoping!

    Reply
  2. Meredith

    February 21, 2016 at 6:36 PM

    Hello, one day I saw you have a cleaning checklist – something I can print out and hand the little mess-makers – but I got distracted before I clicked the link and now I can’t find it again. Obviously I should be able to now what needs cleaning but an already printed list would be wonderful 🙂

    Reply
    • Wellness Mama

      February 21, 2016 at 6:46 PM

      This one? https://wellnessmama.com/4733/cleaning-checklist/

      Reply
  3. Sue

    February 4, 2016 at 12:43 PM

    How long does the washing soda last? I want to make it while it is still winter. Thank you.

    Reply
    • Wellness Mama

      February 4, 2016 at 5:11 PM

      It is very shelf stable once it cools so you should be able to make it ahead of time

      Reply
  4. Lori Endres

    January 20, 2016 at 1:46 PM

    So simple! That is really cool.

    Reply
  5. Heather Bueltemann

    January 20, 2016 at 9:21 AM

    How can I substitute for borax? I want to make laundry det. And scouring paste

    Reply
  6. Mariana

    January 20, 2016 at 7:35 AM

    Well that’s a good idea!
    I haven’t found the washing soda (ok, I never searched of… because I am way too lazy to search for the Portuguese name for it… bummer!). I’ll probably give it a try… or get more serious into finding it at the market.
    Although it is simple, I don’t think it is really helpful on cutting costs. You spend energy with the oven instead.
    But it is good to know that there is a way.
    Thank you!

    Reply
    • Donna

      June 8, 2016 at 11:24 PM

      Actually, if you look at the Consumer Guide to Home Energy Savings, it will only cost about 16 cents to run an electric oven for 1 hour. Less for a gas oven. So, yes, you will be saving a ton of money.

      Reply
  7. Lydia

    January 20, 2016 at 2:59 AM

    Thank you!
    I can get washing soda only in one store here, and they don’t always have it in stock. Now only thing left to figure out is where to get borax…

    Reply
  8. Heather B

    January 19, 2016 at 9:41 PM

    I too want to make washing soda and your scouring scrub. And I would like to make a laundry wash as well, can I make it Borax free? And do you know if I may add essential oils to it I use young living in some of my homemade natural cosmetics.
    H Bueltemann

    Reply
  9. Marsha

    January 19, 2016 at 7:46 PM

    Do you get better results if you wash clothes with washing soda rather than washing with just baking soda? I’ve never tried it but am curious to know if that chemical change makes a big difference in the end result.

    Reply
  10. Sue

    January 19, 2016 at 3:46 PM

    Thank you! I live in Canada in a rural setting and I wanted to try your scouring powder recipe but I wasn’t sure where I could possibly get washing soda locally. Your recipes are great and I look forward to your tips.

    Reply
    • Wellness Mama

      January 19, 2016 at 7:08 PM

      You can actually make washing powder if you can get your hands on baking soda: https://wellnessmama.com/76866/washing-soda/

      Reply
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