The Formation of Soda Ash and Soap Bloom on Aleppo Soap

If you have purchased Aleppo soap from our shop and notice a white, powdery film on its surface after some time, there is no need to worry. What you are seeing is likely soda ash or soap bloom, two completely harmless phenomena that can occur with older soap. In this article, I will explain how soda ash and soap bloom form on Aleppo soap, why they are harmless, and how you can remove them.

What is Soda Ash?

Soda ash forms when free lye (sodium hydroxide, NaOH) in Aleppo soap reacts with carbon dioxide (CO2) from the air. The result of this chemical reaction is sodium carbonate (Na2CO3), which appears as a white, powdery film on the soap's surface. For those who want to know more precisely, here is the chemical equation:

2 NaOH + CO2 → Na2CO3 + H2O

This process usually occurs in the first few days after the soap is unmolded, but it can also happen with soap that has been stored for a longer period.

What is Soap Bloom?

Soap bloom is a similar phenomenon to soda ash, but it occurs due to the crystallization of fatty acids on the soap's surface. Soap bloom also appears as a white film, but it is often less uniform and can form over time, especially on older soap.

How to Remove Soda Ash from Older Aleppo Soap?

There are several methods to remove the white film from your Aleppo soap:

• Alcohol: Spray the soda ash with alcohol (e.g., isopropyl alcohol) and then wipe it off with a soft cloth.
• Steam: Use a steam cleaner or a steam iron to briefly steam the soda ash away.
• Hot Water: Briefly rinse the soap under hot water to wash away the film. This may alter the soap's appearance.
• Shaving: If the film bothers you, you can thinly shave or scrape off the top layer of the soap.
• Regular Use: By using the soap normally, the soda ash will wash away over time.

Can I Prevent Soda Ash on Aleppo Soap?

Since soda ash and soap bloom primarily form due to reaction with the air, it is difficult to completely prevent their formation on already aged soap. However, some measures can help with storage:

• Store Dry: Keep the soap in a dry, cool place to minimize reaction with the air.
• Airtight Packaging: Store the soap in airtight containers or wrap it in plastic wrap to reduce contact with the air.

Is Older Aleppo Soap with Soda Ash Usable?

Absolutely! Sodium carbonate, which makes up soda ash, is a harmless substance also known as washing soda. Your Aleppo soap is completely safe to use despite the film. Some soap makers and users even appreciate the rustic "shabby-chic" look that soda ash gives their soap.

In summary, soda ash and soap bloom on older Aleppo soap are harmless, natural phenomena. With the tips mentioned above, you can either remove or minimize these appearances and continue to enjoy your valuable Aleppo soap.