Does Laundry Detergent or Soap Freeze?

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Having clean clothes is important to most of us. To get our clothes clean, many of us rely on laundry detergent and dish soap. But what happens to these cleaning agents when temperatures drop below freezing? Can laundry detergent and dish soap freeze?

I did some research on this topic to find out the answers. Keep reading to learn what I discovered.

Does laundry detergent freeze?

Laundry detergent, especially in liquid form, can freeze under cold temperatures.

The active ingredients in liquid laundry detergent can become unstable when temperatures fall below 10°C to 25°C (50°F to 77°F). As a result, the liquid detergent could freeze and become less effective at cleaning.

Here are some key things to know about laundry detergent and freezing temperatures:

  • The freezing point for laundry detergent is around -11°C (12°F). Below this temperature, liquid detergent will begin to freeze and solidify.
  • Detergent pods or packets are less likely to freeze than liquid detergent since they contain less water.
  • When liquid detergent freezes, crystals can form. This can clog the detergent dispenser and washing machine.
  • Frozen liquid detergent may still work in some cases, but it likely won’t be as effective as detergent stored above freezing temps.

How to Prevent Laundry Detergent From Freezing

To prevent laundry detergent from freezing, it’s important to store it properly:

  • Keep liquid detergent in a cool, dry place. The ideal temperature range is 10°C to 25°C (50°F to 77°F).
  • Check the temperature where you’ll be storing detergent before buying. Opt for cold temperature formulas if it will be exposed to freezing weather.
  • Store detergent away from direct sunlight and heat sources which can cause it to deteriorate.
  • Close the container tightly after each use to prevent moisture buildup.
  • Consider storing liquid detergent in an interior closet or cabinet rather than a garage or exterior shed.

What to Do if Laundry Detergent Freezes

If you find that your liquid laundry detergent has frozen, here are some tips:

  • Allow it to thaw at room temperature. Once thawed, it should return to a liquid state and be safe to use as normal. Do not try to speed up thawing by heating it.
  • Wait several hours after thawing before using. Give the mixture time to fully liquefy again. Using it right away could clog your machine.
  • Stir occasionally as it thaws to help dissolve any crystals that formed when frozen. You may need to add a bit of warm water to assist.
  • Transfer to an airtight container once thawed to prevent freezing again.

So while laundry detergent can freeze, a few simple storage tips can help prevent freezing issues. And if it does happen, letting it naturally thaw should restore its cleaning power.

At What Temperature Does Laundry Detergent Freeze?

At What Temperature Does Laundry Detergent Freeze

As mentioned above, the average freezing point for laundry detergent is around -11°C (12°F). However, certain factors can raise or lower this freezing point slightly.

Factors that Influence Freezing Point:

  • Concentration – More concentrated detergent solutions generally have lower freezing points.
  • Ingredients – Some compounds like alcohols and glycols can act as antifreeze agents and lower the freezing point.
  • Trapped air – Bubbles of oxygen-rich air in the detergent can allow ice crystals to form at warmer temps.
  • Contaminants – Impurities dissolved in the detergent provide more nucleation sites for crystals to start forming.
  • Container material – Certain plastics are more prone to temperature fluctuations, leading to faster freezing.

So while -11°C is a good benchmark, the actual freezing point for a given laundry detergent product could be a few degrees lower or higher.

Signs Your Detergent is Freezing:

How can you tell if the laundry detergent has crossed below its freezing point? Here are some visible signs:

  • Cloudiness or haziness – The liquid starts to take on a foggy, opaque appearance.
  • Slushy texture – The detergent feels thick and slushy when agitated.
  • Crystals or chunks – Small grains of detergent solids start separating out in the liquid.
  • Failure to pour – The normally fluid detergent stops flowing and pouring from the container.

Once you see these signs, it’s best to let the laundry detergent fully thaw before attempting to use it in your washing machine.

What to Do If Laundry Detergent Freezes

Let’s recap your options if you discover your liquid laundry detergent has frozen:

Allow It to Thaw Naturally

Simply store the frozen detergent container at room temperature and let it thaw over time. This allows the frozen liquid to liquify slowly without risk of damage.

Once thawed, it can be shaken or stirred to reincorporate any crystals before use.

Avoid Heating

While heating frozen detergent may seem like a quick fix, it can actually damage the formula and reduce cleaning power. Excess heat can break down the surfactants.

Let It Stand After Thawing

Don’t use the detergent immediately after thawing. Give it several hours for the water and detergent to fully recombine and liquefy. Using right away risks clogging your machine.

Add Warm Water While Thawing

Gently stirring in warm water can help dissolve any crystals that formed when frozen. But don’t overheat or you may degrade the surfactants.

Transfer to an Airtight Container

Once thawed, store the detergent in an airtight container to prevent it from freezing again. This limits exposure to cold air.

Following these tips will keep your laundry detergent ready to effectively clean clothes, even if it accidentally froze. With proper thawing and storage, its cleaning power can be restored.

How to Store Laundry Detergent to Prevent Freezing

Storing your laundry detergent correctly is key to preventing freezing issues in the first place. Here are some tips for proper storage:

  • Keep detergent between 10°C and 25°C (50°F and 77°F). This moderate room temperature range helps keep it fluid.
  • Choose an interior storage spot – Avoid uninsulated garages, sheds or exterior cabinets subject to freezing temps.
  • Store upright and tightly sealed – Prevent spills that could lead to moisture accumulation and freezing.
  • Avoid direct sunlight – Exposure to heat and UV rays can degrade detergent over time.
  • Check product label – Look for any specific storage instructions from the manufacturer.
  • Buy cold-temp formulations – If storing in cold climates, use detergents designed to resist freezing.
  • Keep detergent off concrete floors – Concrete can pull heat from items, leading to faster freezing.

Following these laundry detergent storage tips can help keep your supply ready to use even in cold weather.

How Does Laundry Detergent Unfreeze?

If your laundry detergent does happen to freeze, how does it go about unfreezing? Here’s a look at the process:

  • Liquids expand when frozen. This forces the detergent molecules apart from one another.
  • Heat is applied (from room temperature air), transmitting warming energy to the frozen detergent.
  • The solid begins to melt as molecular vibrations increase, weakening the crystal lattice.
  • The melting process requires heat absorption known as the latent heat of fusion. This cools the surroundings.
  • Melting occurs from the outside in, allowing melted liquid to start mixing again.
  • Eventually, the full solid reverts to a liquid state, restoring the previous molecular structure.
  • Given time, the ingredients fully remix, recovering its properties.

So in summary, adding heat melts the frozen solid detergent back into a liquid, allowing the ingredients to mesh together again.

Factors Affecting Laundry Detergent Freezing

We’ve covered the main factors that influence the freezing point of laundry detergent, but let’s recap those briefly:

  • Concentration – More concentrated formulas have lower freezing points.
  • Added compounds – Ingredients like alcohols and glycols lower freezing point.
  • Trapped air – Allows more ice crystals to form at warmer temperatures.
  • Contaminants – Additional particles provide more nucleation sites for crystals.
  • Container material – Some plastics transfer temperature changes faster.

Understanding these key factors can help you evaluate the freezing risk for any given laundry detergent product. You can check if it contains freeze-resistant additives or choose a container less prone to freezing.

Does Dish Soap Freeze?

Like laundry detergent, dish soap contains ingredients that allow it to clean effectively. And since water is a major ingredient, you may wonder if dish soap can also freeze in cold temperatures.

The short answer is yes, dish soap can freeze. But it may not freeze fully solid.

Here’s a look at how dish soap is affected by freezing temperatures:

  • Water content starts to freeze at 0°C (32°F) – This is water’s freezing point. Initial freezing causes cloudiness.
  • More ingredients freeze around -11°C (12°F) – Lower than water’s freeze point due to additives. Gets slushy.
  • Fats, oils and waxes remain fluid – This prevents dish soap from becoming completely solid when frozen.
  • Freezing can clog soap dispenser – Frozen soap may not dispense until thawed.
  • Cleaning power remains after thawing – Dish soap regains fluidity and can still clean dishes once thawed.

So while dish soap can partially freeze, it won’t turn into a solid block of ice. And its ability to wash dishes returns to normal after thawing.

The Freezing Point of Dish Soap

As mentioned above, dish soap freezes in stages:

  • 0°C (32°F) – Initial freezing of water content makes liquid cloudy
  • -11°C (12°F) – More ingredients freeze; slushy texture develops
  • Below -11°C (12°F) – Remaining oils and fats stay fluid, preventing full solidification

Dish soap contains surfactants, stabilizers, fragrances and other ingredients in addition to water. These have varying freezing points, preventing the soap from turning into a solid block of ice.

Instead, frozen dish soap becomes a partial gel/slush that retains some fluidity. Only at extremely low temperatures would it freeze completely solid.

Do All Dish Soap Ingredients Freeze?

Dish soap contains a variety of ingredients, each with their own freezing behaviors:

  • Water – Freezes at 0°C. Major ingredient.
  • Detergents – Can become unstable when frozen. Affects lathering.
  • Thickeners – Prevent soap from separating when frozen.
  • Dyes – Water-based dyes will freeze. Don’t impact cleaning.
  • Fragrances – Oil-based. Don’t freeze. Add fresh smell.

So while the water content will freeze first, many other additives remain fluid to varying degrees when frozen. Fats, oils and wax solidify at very low temperatures.

How to Store Dish Soap to Prevent Freezing

Storing dish soap properly can help prevent freezing issues:

  • Keep in contained cabinet – Avoid open counters exposed to freezing air.
  • Insulate from cold surfaces – Keep off cold metal or concrete.
  • Keep capped when not in use – Limits moisture loss and contamination.
  • Avoid direct freezing temperatures – Don’t store in unheated garages or sheds.
  • Allow wide temperature fluctuation – Repeated thawing/freezing degrades soap.
  • Store off the floor – Colder temperatures near ground level.
  • Check product label – Follow any specific storage instructions.

With proper storage, you can prevent your dish soap from freezing. But even if it does freeze partially, it regains its cleaning power once thawed back to room temperature.

Can You Freeze Homemade Soap?

Many people make their own handcrafted soaps at home using oils, fats, lye and other ingredients. This leads some to wonder:

Can you freeze homemade soap?

While you can technically freeze handmade soap, opinions vary on whether you should. Here are some important considerations:

  • May help unmold – Freezing right after molding can make removing soap easier.
  • Can prevent soda ash – Some say freezing minimizes powdery deposits on soap.
  • Condensation can be an issue – Thawed soap “sweats” as moisture evaporates.
  • Certain types get brittle – Melt & pour soap may become crumbly after freezing.
  • No definitive long term benefit – Freezing doesn’t clearly preserve homemade soap.

So freezing may provide some short-term advantages, though long term preservation is uncertain. Weigh the risks and benefits for your particular soap recipe and needs.


To summarize, laundry detergent and dish soap can both partially freeze when exposed to sub-freezing temperatures over an extended period. However, they will return to their normal liquid state and cleaning effectiveness once thawed.

With proper storage, you can prevent freezing issues with these cleaning products. But even if they do freeze accidentally, letting them thaw naturally restores their cleaning power. So you can continue to use laundry detergent and dish soap year-round, even in cold weather climates.

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