Are Container Houses Toxic at High Temperatures?

Container houses generally do not release toxic substances at high temperatures themselves, but the use of inferior materials or the presence of fire hazards may trigger the release of toxic gases or fire risks under high temperatures.

Material Safety

• Qualified Container Houses: The main structure is mostly made of steel, which is flame-retardant and does not release toxic gases due to high temperatures during normal use. Some products use fireproof materials such as rock wool as interlayers, meeting fire safety standards.
• Risks of Inferior Materials: If polyurethane, polystyrene, or other flammable materials are used to fill the panel cores, these materials have low ignition points and will burn rapidly under high temperatures or open flames, releasing toxic gases such as carbon monoxide and hydrogen cyanide. For example, in a container fire in the Langfang Industrial Park, polystyrene sandwich panels exacerbated the spread of the fire.

Fire Hazards

• Poor Fire Resistance: Steel structures are prone to deformation and collapse in fires. When the fire temperature exceeds 500°C, the steel structure loses stability, and an ordinary container house may collapse within 10 minutes, obstructing escape and releasing high-temperature toxic smoke.
• Electrical Wiring Risks: Problems such as unauthorized wiring and the mixed use of high-power electrical appliances are common, easily triggering electrical fires. For example, a container fire in the Tianjin Binhai New Area was caused by an electrical switchboard fault igniting weeds.

Special Risks at High Temperatures

• Accelerated Material Decomposition: Inferior adhesives and waterproof coatings may accelerate the release of volatile organic compounds (VOCs) such as formaldehyde at high temperatures. Although the steel main body is non-toxic, if the auxiliary materials contain formaldehyde, long-term exposure may trigger respiratory diseases or allergic reactions.
• Hazards in Confined Spaces: If ventilation is poor, toxic gases released by materials at high temperatures easily accumulate, leading to deterioration of indoor air quality. For example, the formaldehyde release from cardboard boxes can increase by 3-5 times in high-temperature environments, and similar risks may exist in container auxiliary materials.

Safety Recommendations

• Choose Compliant Products: Prioritize container houses with rock wool sandwich panels and steel structures, and confirm that they have passed fire safety certifications.
• Strengthen Fire Prevention Measures: Avoid using open flames inside the container, standardize the installation of electrical wiring, and equip with fire extinguishing equipment.
• Ensure Good Ventilation: Strengthen ventilation during high-temperature seasons to reduce the concentration of toxic gases and avoid enclosed use.