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Milton Sterilising Fluid

Milton Sterilising Fluid

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  • ✔️ Kills 99.9% of bacteria, viruses, and fungi effectively
  • ✔️ Sterilises baby bottles and teats in just 15 minutes
  • ✔️ No rinsing required at correct dilution — safe for babies
  • ✔️ Requires only cold water — ideal for travel and holidays
  • ✔️ Suitable for continuous use throughout the first 12 months

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What Is Milton Sterilising Fluid and How Does It Help?

 

When you have a newborn, keeping feeding equipment clean is one of those things you simply cannot cut corners on. Babies' immune systems are still developing, which means bacteria and viruses that an adult might shrug off can cause real harm to a young infant. Milton sterilising fluid has been a trusted name in baby hygiene for decades, offering a straightforward cold-water sterilisation method that fits easily into daily routines. At just £2.29, it is one of the most cost-effective ways to protect your baby's health. You can find it alongside other essentials in our baby and toddler range.

The solution works by immersing cleaned items in a diluted mixture of the fluid and cold water. No boiling, no steam, no electricity required. That simplicity is part of why so many parents reach for it, especially when travelling or staying away from home.

 

How Does Milton Sterilising Fluid Work to Kill Germs?

 

The active ingredient is sodium hypochlorite (2% w/v), the same class of compound used in clinical disinfection. When diluted correctly, it releases hypochlorous acid into the water. Here is what happens at a microbial level:

  • Hypochlorous acid penetrates the outer membrane of bacteria and viruses
  • It disrupts essential proteins and enzymes inside the microbial cell
  • The organism loses the ability to function and is destroyed
  • The process is effective against a broad range of pathogens, including E. coli, Salmonella, and common viruses

Because the mechanism is physical and chemical rather than antibiotic-based, there is no risk of resistance developing. The solution remains active in the sterilising container for 24 hours, after which you should make up a fresh batch.

 

Who Should Use Milton Sterilising Fluid?

 

This product is designed primarily for parents and carers of babies and young children. It is particularly useful if you are formula feeding, as bottles and teats need sterilising before every use. That said, it has a broader range of applications too.

  • Parents sterilising bottles, teats, dummies, and breast pump parts
  • Carers in nursery or childminding settings needing a reliable cold-water method
  • Travellers who need a no-fuss sterilisation option without electrical equipment
  • Anyone needing to disinfect food preparation surfaces or utensils in a hygienic, food-safe way

The NHS recommends sterilising all feeding equipment until your baby is at least 12 months old. Milton sterilising fluid is one of the methods they acknowledge as suitable for this purpose.

 

How Does Milton Sterilising Fluid Compare to Other Sterilisation Methods?

 

Feature Milton Sterilising Fluid Electric Steam Steriliser
Requires electricity No Yes
Suitable for travel Yes Limited
Sterilisation time 15 minutes 8–12 minutes
Cost Low (from £2.29) Higher upfront cost

 

How Should You Store and Handle Milton Sterilising Fluid Safely?

 

Store the undiluted bottle below 25°C, away from direct sunlight, and always keep the cap tightly closed. The sodium hypochlorite content can degrade if exposed to heat or light, reducing its effectiveness. Once you have made up your sterilising solution in a container, it remains active for up to 24 hours — after that, discard it and prepare a fresh batch.

Always wash items thoroughly before placing them in the sterilising solution. Residual milk or food debris can reduce the efficacy of the solution. If you are also packing for a holiday, our travel health range has everything else you might need to keep your family safe on the go. Milton sterilising fluid is genuinely one of the most practical items to pack.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Milton Sterilising Fluid specifications
Treatment category Baby hygiene / sterilisation
Active ingredient Sodium hypochlorite 2% w/v, Sodium chloride
Mechanism of action Releases hypochlorous acid which destroys microbial cell membranes and proteins
Suitable for Baby bottles, teats, dummies, breast pump parts, food preparation surfaces
UK classification General Sale List (GSL)
Preparation Liquid solution
Route of administration Topical / cold-water immersion
Effective against Bacteria, viruses, fungi

Specifications of Milton Sterilising Fluid

 

What Is Milton Sterilising Fluid and What Is It Used For?

 

Milton Sterilising Fluid is a cold-water sterilising solution containing sodium hypochlorite 2% w/v and sodium chloride. It is used to sterilise baby feeding equipment — including bottles, teats, dummies, and breast pump components — as well as food preparation utensils and surfaces. The NHS advises that all feeding equipment should be sterilised until a baby is at least 12 months old, as young infants are particularly vulnerable to infections caused by bacteria such as E. coli and Salmonella. Milton sterilising fluid provides a simple, no-heat method to achieve this.

 

What Do You Need to Know Before Using Milton Sterilising Fluid?

 

Before using this product, read the following contraindications and warnings carefully:

  • Do not use undiluted — always follow the recommended dilution instructions
  • Avoid contact with eyes; if contact occurs, rinse immediately with plenty of water
  • Do not use on items that are not compatible with chlorine-based solutions (e.g. some metals)
  • Keep out of reach of children at all times
  • Do not mix with other cleaning products, particularly those containing ammonia or acids, as this can release harmful gases
  • Not suitable for sterilising items that will be used by adults with a known sensitivity to sodium hypochlorite

Known interactions at recommended dilution:

  • Mixing with acidic cleaners (e.g. vinegar-based products) can release chlorine gas — never combine
  • Mixing with ammonia-based products produces toxic chloramine vapour — avoid entirely

 

How Should You Use Milton Sterilising Fluid?

 

Always wash all items thoroughly in hot soapy water and rinse well before sterilising. This removes milk residue and debris that could reduce the solution's effectiveness. Then follow these steps:

  1. Fill a clean sterilising container with 5 litres of cold water
  2. Add one 30ml capful (one cap) of Milton Sterilising Fluid
  3. Stir gently to mix the solution evenly
  4. Fully submerge all items to be sterilised, ensuring no air bubbles are trapped inside bottles or teats
  5. Leave items immersed for a minimum of 15 minutes
  6. Remove items and use immediately — no rinsing is required at the correct dilution
  7. Discard the solution after 24 hours and prepare a fresh batch
Indication Age Group Dose Frequency
Baby bottle sterilisation 0–12 months 1 capful (30ml) per 5 litres water Every 24 hours or as needed
Surface/utensil disinfection All ages 1 capful (30ml) per 5 litres water As required

If you are travelling and need to sterilise equipment on the go, Milton Sterilising Fluid is an excellent choice — it requires only cold water and no specialist equipment. You might also want to browse our first aid range to make sure your travel kit is fully stocked.

 

What Are the Possible Side Effects of Milton Sterilising Fluid?

 

At the recommended dilution, Milton Sterilising Fluid is considered safe for use around babies and young children. However, the undiluted solution is an irritant and should be handled with care.

Common side effects (from undiluted or incorrectly diluted solution):

  • Skin irritation or redness on direct contact
  • Eye irritation if splashed
  • Mild bleaching of fabrics or surfaces

Less common side effects:

  • Respiratory irritation if used in a poorly ventilated space with large quantities
  • Allergic skin reaction in individuals with hypersensitivity to sodium hypochlorite

If you or your baby shows any sign of an allergic reaction — such as rash, swelling, or breathing difficulty — stop use immediately and seek medical advice. For general baby skin concerns, our skin care range includes products suitable for sensitive infant skin.

 

How Should You Store Milton Sterilising Fluid?

 

  • Store below 25°C in a cool, dry place away from direct sunlight
  • Keep the bottle tightly closed when not in use
  • Do not store near heat sources or in a car during warm weather
  • Keep out of reach and sight of children at all times
  • Do not transfer to another container — always keep in original packaging
  • Prepared sterilising solution should be discarded after 24 hours
  • Check the expiry date on the bottle before use

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy Milton Sterilising Fluid online in the UK?

You can buy Milton Sterilising Fluid online from Cured Pharmacy for just £2.29 with fast UK delivery. It is also widely available from supermarkets and high street pharmacies. Ordering online is convenient, especially when you need it delivered alongside other baby essentials from our baby and toddler range.

How does Milton Sterilising Fluid work to kill bacteria and viruses?

Milton Sterilising Fluid contains sodium hypochlorite, which releases hypochlorous acid when diluted in water. This acid penetrates and destroys the cell membranes and proteins of bacteria, viruses, and fungi. Because the mechanism is chemical rather than antibiotic-based, there is no risk of microbial resistance developing over time.

How do I use Milton Sterilising Fluid step by step?

First, wash all items thoroughly in hot soapy water and rinse well. Then add one 30ml capful of Milton Sterilising Fluid to 5 litres of cold water, submerge all items fully ensuring no air bubbles are trapped, and leave for at least 15 minutes. Items can be used directly from the solution — no rinsing is needed at the correct dilution.

Do I need to rinse baby bottles after sterilising with Milton Sterilising Fluid?

No, rinsing is not required when Milton Sterilising Fluid is used at the correct dilution of one capful per 5 litres of water. The residual solution at this concentration is safe for babies. However, if you have used a stronger concentration by mistake, rinse items thoroughly with cooled boiled water before use.

Is Milton Sterilising Fluid safe for newborns?

Yes, Milton Sterilising Fluid is widely used for sterilising feeding equipment for newborns when used at the recommended dilution. The NHS advises sterilising all feeding equipment until your baby is at least 12 months old. Always follow the label instructions carefully to ensure the correct concentration is used.

What is the correct dilution for Milton Sterilising Fluid?

The correct dilution is one 30ml capful of Milton Sterilising Fluid added to 5 litres of cold water. Do not use a stronger concentration than recommended, as this can cause irritation. Always measure carefully using the cap provided with the bottle.

How long should items stay in Milton Sterilising Fluid?

Items should be fully submerged in the sterilising solution for a minimum of 15 minutes to ensure effective sterilisation. You can leave items in the solution for up to 24 hours without any harm. After 24 hours, discard the solution and prepare a fresh batch before sterilising again.

Can I use Milton Sterilising Fluid when travelling abroad?

Yes, Milton Sterilising Fluid is an excellent choice for travel because it requires only cold water and no electricity. It is compact and easy to pack, making it ideal for holidays and trips away. You can find other useful travel health products in our travel collection to keep your family protected on the go.

What are the side effects of Milton Sterilising Fluid?

At the recommended dilution, Milton Sterilising Fluid is generally well tolerated and safe for use around babies. The undiluted solution can cause skin and eye irritation on direct contact, so always handle with care. If you notice any signs of an allergic reaction such as rash or swelling, stop use and seek medical advice promptly.

What are alternatives to Milton Sterilising Fluid?

Alternatives include Milton Sterilising Tablets (which dissolve in water for the same cold-water method), electric steam sterilisers, and microwave sterilisers. The fluid is often preferred for travel or when electricity is not available. Each method has its own advantages, so the best choice depends on your lifestyle and circumstances.

How long can I keep the prepared Milton Sterilising Fluid solution?

Once you have made up the sterilising solution, it remains effective for up to 24 hours. After 24 hours, the sodium hypochlorite degrades and the solution loses its sterilising ability. Always discard old solution and prepare a fresh batch daily to ensure reliable sterilisation.

Can Milton Sterilising Fluid be used to clean breast pump parts?

Yes, breast pump components that come into contact with milk — such as flanges, valves, and collection bottles — can be sterilised using Milton Sterilising Fluid. Always wash parts thoroughly before immersing them in the solution. Check your breast pump manufacturer's guidance to confirm all parts are compatible with chlorine-based sterilising solutions.

Is Milton Sterilising Fluid suitable for sterilising dummies and soothers?

Yes, dummies and soothers can be sterilised using Milton Sterilising Fluid at the recommended dilution. Ensure the dummy is fully submerged with no air pockets and leave for at least 15 minutes. No rinsing is required before giving the dummy to your baby.

What is the latest guidance on sterilising baby equipment in the UK?

The NHS currently recommends sterilising all feeding equipment — including bottles, teats, and breast pump parts — until your baby is at least 12 months old. Cold-water sterilisation using a hypochlorite-based solution such as Milton Sterilising Fluid is listed as an accepted method. Always follow current NHS guidance, which is regularly reviewed and updated.

Can Milton Sterilising Fluid be used on food preparation surfaces?

Yes, at the recommended dilution Milton Sterilising Fluid can be used to disinfect food preparation surfaces and utensils. It is effective against a broad range of foodborne pathogens including E. coli and Salmonella. Allow surfaces to air dry or wipe with a clean cloth after application — no rinsing is required at the correct dilution.

How Should You Use Milton Sterilising Fluid?

Before sterilising anything, always wash all items thoroughly in hot soapy water and rinse well under running water. Milk residue or food debris left on surfaces can reduce the effectiveness of the sterilising solution, so this step really does matter. Once items are clean, follow these steps:

What Is the Correct Dose of Milton Sterilising Fluid?

The dilution ratio is the same regardless of what you are sterilising — one capful (30ml) per 5 litres of cold water. Never use a stronger concentration than recommended, as this can cause irritation and is not more effective. Always use the cap provided to measure accurately.

When Is the Best Time to Use Milton Sterilising Fluid?

Many parents find it easiest to sterilise a full batch of bottles and equipment at the same time each day — for example, last thing at night — so everything is ready for the following day. Items can remain in the solution for up to 24 hours, so there is no need to sterilise individual items each time. If you are travelling across time zones or have an unpredictable schedule, simply prepare a fresh batch whenever the previous one reaches the 24-hour mark.

How Long Can You Use Milton Sterilising Fluid For?

The NHS recommends sterilising all feeding equipment until your baby is at least 12 months old. You can continue using Milton Sterilising Fluid throughout this entire period without any concerns about long-term use. Once your child is over 12 months, routine sterilisation of feeding equipment is generally no longer necessary, though the fluid can still be used for general household disinfection purposes as needed.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

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What Are the Most Common Side Effects of Milton Sterilising Fluid?

When used at the correct dilution, Milton Sterilising Fluid is considered safe and well tolerated. The most common side effects occur when the undiluted solution comes into direct contact with skin or eyes during handling. Always take care when pouring and measuring the fluid.

  • Skin redness or irritation on direct contact with undiluted solution
  • Mild bleaching of fabrics or coloured surfaces if spilled
  • Temporary skin dryness after repeated handling without gloves

What Are the Less Common Side Effects of Milton Sterilising Fluid?

Less common reactions are typically associated with incorrect use, such as using too strong a concentration or using the product in a poorly ventilated space. These effects are uncommon when the product is used as directed.

  • Eye irritation or watering if splashed — rinse immediately with plenty of water
  • Mild respiratory irritation if large quantities are used in a confined, unventilated space
  • Skin sensitisation in individuals with a known hypersensitivity to sodium hypochlorite

What Are the Serious Side Effects of Milton Sterilising Fluid?

Serious adverse effects are rare and are almost exclusively associated with accidental ingestion of the undiluted product or misuse. If the undiluted fluid is swallowed, it can cause irritation or burns to the mouth, throat, and stomach. In the event of accidental ingestion, do not induce vomiting — contact NHS 111 or go to your nearest A&E immediately and take the bottle with you so medical staff can see exactly what was ingested.

What Should You Do If You Experience Side Effects?

If you experience skin irritation after handling the undiluted solution, wash the affected area thoroughly with soap and water. For eye contact, rinse immediately with plenty of clean water for at least 10 to 15 minutes and seek medical advice if irritation persists. If you suspect an allergic reaction — such as hives, swelling of the face or throat, or difficulty breathing — stop use immediately and call 999 or go to A&E.

Can Milton Sterilising Fluid Interact With Other Products?

Milton Sterilising Fluid should never be mixed with other cleaning or disinfecting products. Mixing with acidic cleaners such as vinegar-based products can release chlorine gas, which is harmful if inhaled. Mixing with ammonia-based products produces toxic chloramine vapour. Always use Milton Sterilising Fluid on its own, diluted only with water, and store it away from other household chemicals.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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