Laundry detergent is an indispensable household item. As times change, more brands emerge with varying quality. What should we consider when using detergent? Next, we'll address whether expired detergent remains usable.
1. Scented detergents aren't necessarily better
Analysis:Correct
Beyond "cleaning effectiveness," most consumers prioritize "fragrance appeal" when selecting detergents. However, the vast majority of added fragrances are synthetic chemicals—95% derived from petroleum byproducts like benzene and aldehydes. These substances may cause cancer, reproductive disorders, and commonly trigger allergic dermatitis.
2.Hand washing clothes without detergent
Analysis: Correct
Prolonged direct skin contact with alkaline detergent damages the skin's naturally acidic surface layer. This disrupts its ability to inhibit bacterial growth, potentially causing skin itching, allergic dermatitis, or pigment deposits. Therefore, soap is preferable for hand washing.Washing powder can be used for multiple purposes
Analysis: False
Many people treat washing powder as an "all-purpose cleaner," using it not only for laundry but also to scrub furniture and floors, believing it cleans, disinfects, and kills germs. However, this practice may cause washing powder to enter the body. Experts warn that even trace amounts ingested can lead to poisoning.Would you still dare to use it for multiple purposes?
4. Multifunctional laundry detergents are more effective
Analysis: False
Many laundry detergent advertisements claim to contain new formulas that deliver enhanced cleaning power. These formulas primarily include surfactants, detergent builders, and enzymes to achieve solubility, cleaning, softening, foaming, and static elimination.However, excessive additives in detergents pose health risks. Commonly used detergent builders harm the liver; surfactants have long been known to damage the skin's protective barrier, causing roughness, and are now recognized as significant environmental pollutants.The alkaline substances in heavy-duty detergents not only degrade water quality but also damage human cell membranes, causing denaturation of structural proteins. The organic chlorine and fluorescent whitening agents in whitening detergents are toxic substances that readily accumulate in the body, posing health risks.False
Many homemakers habitually add disinfectant to laundry to kill bacteria, while some even mix detergent and disinfectant directly in the washing machine. In reality, this practice not only fails to achieve sterilization but also poses health risks.
Disinfectants are chlorinated phenolic agents; excessive or improper use can be harmful.Laundry detergent often contains surfactants. Mixing detergent and disinfectant can easily trigger chemical reactions that weaken both products' effectiveness. Furthermore, combining chlorine-based disinfectant with acidic laundry detergent can produce chlorine gas. High concentrations of chlorine gas irritate the eyes, nose, and throat. Severe exposure can damage heart and lung function, even posing a life-threatening risk.
The proper washing method is: Add 3-5 drops of disinfectant to one drum of water in the washing machine, or dilute it to a 1%-5% solution. Soak clothes, bedding, etc., for 30-60 minutes before washing normally with detergent.
6. Detergent has an expiration date
Analysis:Correct
Standard laundry detergent typically lasts two years when stored properly. Detergents with special additives may have a shorter shelf life. Store detergent in a sealed plastic container or jar to prevent moisture absorption and clumping, and to avoid inhaling synthetic fragrances after the scent dissipates.
7. Hot water cleans clothes better
Analysis: False
Rinsing during laundry aims to fully saturate fabrics. Water submerging fibers dissolves water-soluble stains, reducing detergent usage while enhancing cleaning efficacy.
Higher water temperatures aren't necessarily better for laundry. Most detergents contain enzymes, primarily alkaline proteases and alkaline lipases. Alkaline proteases break down protein-based stains like sweat and blood;while alkaline lipase primarily targets fatty acids and ester-based stains—commonly referred to as grease stains. The activity of both enzymes is temperature-dependent, with approximately 40°C being optimal. Temperatures that are too high or too low can impair enzyme activity. Additionally, proteins undergo denaturation. A notable characteristic of denaturation is protein coagulation, which significantly reduces fluidity—as seen when eggs solidify upon cooking.One cause of denaturation is high temperatures. Protein-based stains on clothing behave similarly. Therefore, using excessively hot water during laundry can cause these proteins to denature and coagulate onto fabric fibers, making them harder to remove. That concludes our discussion on whether expired laundry detergent can still be used. We hope this information has provided you with valuable insights. Finally, we sincerely wish you good health and happiness in your daily life.