Can the laundry detergent still be used after it expires?

Whether the washing powder can still be used after it expires has become a controversial issue for many people. Some people say that expired washing powder can be used again, but some people do not feel any effect after using expired washing powder. These are very common problems, because these problems do exist. Whether the washing powder can still be used after it expires, we have done a lot of experimental reports. The following will introduce the details to everyone. I hope everyone can know the relevant knowledge. Let's take a look at whether the washing powder can be used after it expires:

It's alkaline!

The main ingredients of laundry detergent are anionic surfactants: sodium alkylbenzene sulfonate, a small amount of non-ionic surfactants, and some additives, phosphates, silicates, sodium sulfate, fluorescent agents, enzymes, etc. It is made through mixing, powder spraying and other processes. Now most people use 4A fluorite instead of phosphate.

Alkali agent: Under appropriate alkalinity, fibers and dirt can be ionized to the maximum extent, making it easier for the dirt to be hydrolyzed and dispersed. General laundry detergent formulas contain pure alkali and sodium silicate, among which sodium silicate has the characteristics of suspending dirt particles and preventing redeposition.

NaOH is a strong alkali, and the alkalinity of laundry detergent is not as strong as 20% NaOH. No problem, it may be that the cleaning ability is poor.

The main ingredients of washing powder are: surfactant (sodium dodecylbenzene sulfonate is commonly used), water softener (sodium tripolyphosphate is commonly used), alkali agent (pure alkali and sodium silicate are generally used), bleaching agent (some washing powders use sodium borate as bleaching agent), enzyme (mainly a complex enzyme composed of protease, lipase, cellulase, etc.), fluorescent brightener, carboxymethyl cellulose (plays an anti-redeposition role), flavor, pigment, filler (mainly sodium sulfate, which plays a filling role to make the product look a lot)

The surfactants, enzymes, carboxymethyl cellulose, etc. are all active substances. If left for a long time, they will react with the air and decompose, thus losing their washing and cleaning effects. Some ingredients in expired laundry detergent can still decompose some stains, but the cleaning effect has been greatly reduced, and the denatured laundry detergent ingredients may also damage clothes, so generally speaking, expired laundry detergent should not be used.

In fact, even if the laundry detergent is expired, as long as it does not affect the effectiveness of the laundry detergent, the smell has not changed, and it still has the fragrance of the laundry detergent, then such laundry detergent can still be used. In fact, the shelf life of laundry detergent is very long, so you don’t need to worry too much about this. It will not cause any harm to your body if you use expired laundry detergent to wash clothes, as long as you wash the laundry detergent thoroughly.