Core Viewpoint - The article highlights the health risks associated with low-quality mobile phone cases, which often contain harmful substances due to the use of recycled materials and substandard production practices [1][3][4]. Group 1: Consumer Concerns - Many consumers report strong plastic odors from cheap mobile phone cases, which can become more pronounced when the phone heats up [2][3]. - A significant number of reviews on low-cost phone cases indicate persistent unpleasant smells even after prolonged use [2][10]. Group 2: Industry Practices - The mobile phone case industry has low entry barriers, allowing many small workshops to produce cases using recycled plastics and industrial-grade dyes, often violating safety standards [3][4]. - Some manufacturers may use medical waste and electronic garbage, leading to the presence of toxic substances like phthalates, polycyclic aromatic hydrocarbons, and heavy metals in the products [4][6]. Group 3: Health Risks - Prolonged exposure to harmful substances in low-quality phone cases can lead to serious health issues, including cancer risks from polycyclic aromatic hydrocarbons and chronic poisoning from formaldehyde and benzene [6][11]. - Specific health risks include developmental abnormalities in children, respiratory issues, and reproductive health problems in adults [7][10]. Group 4: Quality Assessment - A quality assessment by the Zhejiang Provincial Market Supervision Administration found that some low-priced phone cases had lead content exceeding national safety standards by 30 times [10]. - The article emphasizes the lack of mandatory certification for mobile phone cases, allowing many "three-no" products (no manufacturer name, no quality inspection, no standards) to flood the market [13][22]. Group 5: Purchasing Recommendations - Consumers are advised to choose phone cases made from liquid silicone or TPU, which typically do not emit odors and have a soft yet durable feel [14][17]. - It is recommended to look for products with 3C certification and compliance with national standards, ensuring safety and quality [17][18]. - Consumers should avoid flashy and cheap phone cases, as they may conceal health risks, and consider regular replacement of cases to mitigate potential hazards [19][21].