The Occupational Exposure Limits for Hazardous Agents in the Workplace(GBZ 2-2002) was issued on April 8, 2002. It has been revised by the Ministry of the Health(MOH) in 2007 and divided into two parts, known as the part one of the chemical hazardous agents (GBZ 2.1-2007) and part two of the physical agents(GBZ 2.2-2007). GBZ 2.1-2007 is a compulsory national standard concerning occupational exposure limits for chemical hazardous agents on workplace, which has come into effect as of 1 November, 2007. This standard has set occupational exposure limits for 339 hazardous chemicals, 47 kinds of dust and 2 biological agents(Beauveria bassiana & Subtilisins).
This standard is applicable to the design of industrial hygiene and various workplaces existing or generating chemical hazards. It is made for the purpose of the monitoring, assessing and controlling of the hygiene and working conditions, exposure degree of chemical agents for workers, leakage of production facilities and the effect of protective measures on workplace, apart from the supervision purpose on occupational health. This standard is not applicable to unprofessional contact.