Table of Contents
There’s something incredibly satisfying about a product that fizzes, foams, and makes cleaning feel just a little bit more enjoyable - and that’s exactly why toilet, mop & sink fizzers have become so popular. If you’ve been wondering how to make toilet/mop & sink fizzers, the good news is that they’re fairly simple to put together and can be adapted to suit different cleaning routines.
Whether they’re dropped into the toilet bowl, dissolved into mop water, or used in the sink for a freshen-up, these little cleaning tablets are a fun and practical addition to any home fragrance or cleaning range. But as with all fragrance-based DIY products, there’s a right way to make them - especially if you’re planning to sell them in the UK.
In this blog, we’ll break down how to make toilet/mop & sink fizzers, what ingredients are commonly used, what you need to know about CLP, and why CLP recalculations matter more than many people realise.
If you are looking for how to make toilet/mop & sink fizzers for personal use or to develop a product for your business, understanding both the recipe and the compliance side is important so please remember that thorough product testing and research is required before gifting or selling you toilet/mop & sink fizzers.
What Are Toilet/Mop & Sink Fizzers?
If you are researching how to make toilet/mop & sink fizzers, it helps to understand both how they work and how they are intended to be used.
Toilet, mop & sink fizzers are solid cleaning tablets designed to dissolve in water. Most formulas rely on the reaction between sodium bicarbonate and citric acid to create that fizzy effect, while surfactants such as SLSA can be added to help with cleansing performance.
They can be used in a few different ways depending on how you market them:
- Dropped straight into the toilet bowl
- Dissolved into a bucket of mop water
- Used in the sink or drain as part of a cleaning routine
- Added to hard surface cleaning routines for a little extra freshness
They’re popular because they’re quick to use, easy to store, and can make a regular cleaning job feel a bit more elevated. Much like other fragrance-led home products, they combine practicality with a more enjoyable user experience.
Why Are Toilet/Mop & Sink Fizzers So Popular?
Cleaning products have come a long way from purely functional basics. More and more, customers are looking for products that feel enjoyable to use, smell lovely, and fit into a home care routine that feels a little more luxurious.
That’s part of the appeal of toilet, mop & sink fizzers. They offer -
- A satisfying fizzing reaction
- A convenient single-use format
- Easy storage
- A simple way to make cleaning feel more elevated
- Plenty of room for creativity in your product range
They’re also a great option for makers who want to expand into home care style products without creating something overly complicated.
A Word On Safety And Compliance
Before we get into how to make toilet/mop & sink fizzers, it is worth talking about safety.
Although these products can look simple, they are still cleaning products - and that means compliance matters. In the UK, if the finished mixture is hazardous, it must be classified and labelled as such.
It is also important to remember that citric acid is a hazardous base raw material.
ECHA’s substance information for citric acid shows a harmonised classification including serious eye irritation and possible respiratory irritation. That means even a simple fizzer base should never be assumed to be automatically non-hazardous just because it only contains a few ingredients.
Please also note that you are responsible for ensuring that you obtain recalculated CLPs where necessary in order to remain legally compliant when using a hazardous base.
DIY Toilet/Mop & Sink Fizzer Recipe
This recipe is a simple base formula for anyone looking into how to make toilet/mop & sink fizzers. If you are planning to sell your finished product, you will need to ensure full compliance with CLP, detergent labelling (where relevant), and any other applicable UK requirements before placing your products on the market for sale.
Once you understand the basics of how to make toilet/mop & sink fizzers, you can start testing a simple base formula.
Example recipe: 500g total
Ingredients:
- Sodium Bicarbonate – 335g
- Citric Acid Anhydrous – 125g
- SLSA – 25g
- Fragrance Oil – 15g
Method:
- Weigh all ingredients accurately.
- Sieve the sodium bicarbonate, citric acid and SLSA to remove any lumps.
- Mix the dry ingredients together thoroughly until evenly blended.
- Add the fragrance oil slowly and mix well to distribute evenly throughout the batch.
- Press firmly into moulds (HB clams are perfect for this!)
- Leave to dry fully for 24 to 48 hours.
- Package in moisture-resistant packaging.
Remember - because this formula contains SLSA, it is best to handle the powder carefully and avoid creating airborne dust during mixing.
To Use:
- Drop one into the toilet bowl and allow it to fizz before brushing
- Dissolve one into warm mop water
- Use one in the sink or drain as part of a cleaning routine
Usage instructions should always be tailored to your final product and backed up by your own thorough product testing.
Sodium Lauryl Sulfoacetate (SLSA)
£2.99
Sodium Lauryl Sulfoacetate (SLSA) is perfect for creating gentle foams. SLSA offers a super soft, skin-friendly lather that's perfect for sensitive skin. It's the secret to creating luxuriously creamy bubbles in bath bombs, bubble bars and cleansers. Get all the… read more
Sodium Bicarbonate | Powder Fine
£3.29
Our Pharmaceutical (FCC Food Grade) Sodium Bicarbonate is a premium, ultra-fine powder that’s perfect for a wide range of home and cosmetic uses. Safe, gentle, and effective, it’s a versatile staple for every DIY enthusiast. Perfect for Bath Bombs -… read more
Citric Acid | Anhydrous
£5.49
A must-have for any bath and body maker, our premium citric acid is the secret to creating fizzing, skin-loving treats and luxury spa products at home. Gentle yet effective, it’s perfect for adding that signature sparkle to bath bombs, as… read more
What CLP Does It Need?
When learning how to make toilet/mop & sink fizzers for sale in the UK, CLP is one of the most important parts to get right.
The exact classification depends on the finished formula and the hazard data for each raw material. For products like these, common hazard classes that may need to be considered include Eye Irrit. 2 (H319) or Eye Dam. 1 (H318), depending on the ingredients and their concentrations. HSE’s cleaning-product guidance explains the pictograms used for serious eye damage and eye irritation if you wish to research further.
So, you'll need recalculated CLPs for this product as it is made with a hazardous base, and so the standard CLP templates provided by most suppliers will not be suitable.
Why Citric Acid Matters
A lot of makers think of citric acid as just part of the fizzy reaction, but from a compliance point of view, it is much more important than that.
Citric acid is a hazardous base raw material, which means once it is part of your formula, your finished mixture needs proper assessment and care. You should not simply assume that a stripped-back fizzer recipe is outside CLP just because it looks simple on paper. ECHA’s substance information for citric acid includes a harmonised classification for serious eye irritation and may cause respiratory irritation.
That is exactly why CLP recalculations matter. If your citric acid percentage changes, your supplier changes, or your updated SDS contains different hazard information, you should reassess the final product.
Where To Check On The IFRA
If you are adding fragrance to your fizzers, you also need to check the IFRA Certificate for your chosen fragrance oil.
This is where you will find the maximum allowable use level for different product categories. IFRA explains that these limits are expressed as a Maximum Allowed Percentage in the finished product, not just in the fragrance oil itself, and that the most stringent applicable restriction should be followed.
Which IFRA category applies?
This depends on how the product is intended to be used.
IFRA’s guidance places:
- Hard surface cleaners of all types under Category 10A
- Toilet gel and rim blocks (toilet) under Category 12
So for toilet, mop & sink fizzers:
- a mop or hard surface fizzer would usually be checked against Category 10A
- a toilet-only fizzer is more likely to fall under Category 12
If your product overlaps more than one type of use, it is safest to work to the most restrictive relevant category. That is in line with IFRA’s own guidance.
When Do You Need To Recalculate CLP?
Yes. This is especially important because citric acid is a hazardous base raw material, so you cannot use the standard non-hazardous CLP templates provided by most suppliers, and instead, you'll need your CLPs to be professionally recalculated due to the use of a hazardous base.
Conclusion
If you have been wondering how to make toilet/mop & sink fizzers, the process itself is fairly simple - but selling them properly in the UK involves much more than getting a good fizz.
You need to think about:
- the finished formula
- the raw material SDS documents
- your CLP classification
- the correct IFRA category
- getting your CLPs professionally recalculated when using a hazardous base
When done properly, toilet, mop & sink fizzers can be a really fun addition to a cleaning or home fragrance range. They’re practical, satisfying to use, and easy to tailor to your brand - but as always, safety and compliance come first.
Final Thoughts
Toilet, mop & sink fizzers are one of those products that make cleaning feel a little less mundane and a little more enjoyable. They are simple in concept, easy to customise, and a great way to branch into a different type of home product.
Just remember - because citric acid is a hazardous base raw material, and because formulas can change over time, recalculated CLPs are essential.
If you are using fragrance oil, always check the IFRA Certificate first, match it to the correct category, and work to the most restrictive applicable limit.
Discover Premium Fragrance Oils For Home Cleaning Products
Looking to create your own fragranced cleaning products? House of Scent offers premium, undiluted fragrance oils inspired by popular scents, perfect for makers wanting to create products that feel both practical and luxurious. Whether you are experimenting at home or expanding your business range, choosing the right fragrance oil is a great place to start.
Browse Premium Fragrance Oils
Disclaimer: The information provided in this blog is based on our knowledge, experience, and research at the time of writing. While we strive to ensure accuracy, we encourage readers to conduct their own research and verify information independently, especially when making business or purchasing decisions. It is the reader’s responsibility to carry out thorough product testing, particularly before commencing batch production. Customers are fully responsible for checking the latest IFRA documentation, using the correct CLP labels for their specific products, and ensuring they hold the relevant CPSR assessments where required. House of Scent is not liable for any actions taken based on the content of this blog.
FAQs
What Are Toilet/Mop & Sink Fizzers?
Toilet, mop & sink fizzers are solid cleaning tablets designed to dissolve in water. Most formulas rely on the reaction between sodium bicarbonate and citric acid to create that fizzy effect, while surfactants can be added to help with cleansing performance.
They can be used in a few different ways depending on how you market them:
- Dropped straight into the toilet bowl
- Dissolved into a bucket of mop water
- Used in the sink or drain as part of a cleaning routine
- Added to hard surface cleaning routines for a little extra freshness
They’re popular because they’re quick to use, easy to store, and can make a regular cleaning job feel a bit more elevated. Much like other fragrance-led home products, they combine practicality with a more enjoyable user experience.
Why Are They So Popular?
Cleaning products have come a long way from purely functional basics. More and more customers are looking for products that feel enjoyable to use, smell lovely, and fit into a home care routine that feels a little more luxurious.
That’s part of the appeal of toilet, mop & sink fizzers. They offer:
- A satisfying fizzing reaction
- A convenient single-use format
- Easy storage
- A simple way to make cleaning feel more elevated
- Plenty of room for creativity in your product range
They’re also a great option for makers who want to expand into home care style products without creating something overly complicated.
