What is the maximum amount of Butane allowed in the air when working hot i?

The maximum allowable concentration of butane in the air for occupational exposure is typically considered to be around 800 parts per million (ppm) for an 8-hour workday, according to the Occupational Safety and Health Administration (OSHA) guidelines. However, this limit can vary based on local regulations and specific workplace safety standards. It is essential to ensure proper ventilation and monitoring to maintain air quality and worker safety. Always refer to the relevant safety data sheets and regulations for the most accurate information.