What is the standard TWA (time-weighted average) for formaldehyde (HCHO)?

The standard time-weighted average (TWA) for formaldehyde (HCHO) is 8 hours. This measurement reflects the average exposure to a hazardous substance during a standard work shift. Adopting an 8-hour standard allows for consistent evaluation of worker safety and health regarding exposure to formaldehyde.

Formaldehyde is a volatile organic compound commonly found in various industries, and prolonged exposure can lead to health risks such as respiratory irritations and long-term effects like cancer. Regulators set the TWA at 8 hours to ensure that workers are not exposed to harmful levels over a typical workday, balancing safety with practical work requirements. TWA is established based on a range of factors, including toxicity, potential health effects, and the ability to mitigate exposure.

In workplaces where formaldehyde is present, adhering to this standard helps maintain compliance with health guidelines and provides a safer working environment.