The core components of air fresheners—including natural essential oils, synthetic fragrances, and solvents—have clear industry standards for toxicity classification and safety thresholds:
Natural essential oils are classified as low-toxic ingredients, with an indoor safety threshold of 0.1–0.3mg/m³. Potential risks are minimal: only excessive direct skin contact may cause mild allergic reactions, and the toxicity risk is extremely low after volatilization in normal use scenarios.
Toxicity classification varies significantly between compliant and inferior products:
Compliant products: Use cosmetic-grade raw materials, most of which are slightly toxic or practically non-toxic. The safety threshold for synthetic fragrances is ≤1mg/m³, while the total volatile organic compounds (VOCs) content from solvents must comply with ≤0.6mg/m³.
Inferior products: Often use unregulated industrial-grade raw materials, which are more toxic and exceed safety thresholds. Prolonged inhalation of these substances may impair the respiratory tract and nervous system.
Inferior air fresheners frequently contain illegal additives, including excessive synthetic fragrances and industrial-grade solvents (e.g., unrefined alcohols, aromatic hydrocarbons). These ingredients lack safety testing, and their concentrations far exceed compliance standards.
After volatilization, harmful substances easily accumulate in enclosed spaces. Short-term exposure may cause acute discomfort such as dizziness, nausea, and respiratory tract irritation. Long-term inhalation can lead to chronic damage to liver and kidney functions. Vulnerable groups—including the elderly, children, and pregnant women—are more severely affected, with increased risks of allergies, reduced immunity, and other adverse health outcomes.
Volatile components in air fresheners—such as fragrances, solvents, and auxiliary chemicals—cannot disperse effectively in enclosed spaces (e.g., bedrooms, bathrooms with closed windows), leading to a significant accumulation effect. Even compliant products may cause indoor VOCs levels to exceed safe limits if used excessively or continuously.
This accumulation gradually impacts human health:
Short-term exposure: May cause dizziness, chest tightness, headaches, and eye/nose irritation.
Long-term exposure: Places persistent burden on the respiratory tract and immune system, increasing the risk of chronic respiratory diseases.
Vulnerable groups: The elderly, children, and pregnant women are more susceptible to these impacts due to weaker physiological resilience.
Air freshener volatiles pose distinct toxicity risks to special groups—including the elderly, children, pregnant women, and allergy sufferers—primarily because these groups have weaker bodily functions, underdeveloped systems, or heightened sensitivity to irritants, resulting in far lower tolerance than average adults:
The elderly have fragile respiratory mucosa and often suffer from pre-existing chronic conditions (e.g., asthma, chronic obstructive pulmonary disease). Exposure to air freshener volatiles can easily trigger coughing, chest tightness, and exacerbate underlying illnesses.
Children’s bodies and nervous systems are underdeveloped, with immature metabolic and detoxification capacities. Long-term exposure to harmful volatiles may affect neurological development and impair immune function.
Pregnant women have special metabolic conditions, and harmful components (e.g., certain solvents, synthetic fragrances) may cross the placental barrier, posing potential risks to fetal development (e.g., affecting organ maturation).
Allergy sufferers are prone to adverse reactions—such as skin itching, nasal congestion, and asthma—when exposed to specific ingredients in air fresheners, including synthetic fragrances, natural essential oils, and preservatives.
Compliant air fresheners adhere to national and international safety standards (e.g., REACH, EPA, GB/T standards), with harmful substances in core materials strictly controlled within safe thresholds. When used properly—including ventilated environments, controlled usage duration, and keeping away from special groups—their toxic risks are minimal and negligible for most people.
Inferior air fresheners are untested and non-compliant, often containing industrial solvents, excessive fragrances, or even toxic byproducts (e.g., formaldehyde, benzene series). Long-term use or use in enclosed spaces can cause acute discomfort (dizziness, respiratory irritation) and chronic health damage (liver/kidney impairment, neurological issues). Vulnerable groups face significantly higher risks, making these products a serious threat to public health.
The key to safe use lies in selecting compliant products from reputable brands and following recommended usage guidelines to avoid excessive exposure.