Abstract: Objective To explore the applicability of four occupational health risk assessment methods to the laboratory of chemical enterprises. Methods From November to December 2021,an occupational health survey was conducted in the laboratory of a chemical enterprise in Langfang City.The occupational health risk of chemical poisons exposed to laboratory workers was assessed by the semi quantitative risk assessment method for occupational exposure to chemical poisons of Singapore ministry of manpower （MOM）,the assignment quantitative method and matrix method of occupational health risk assessment method of the international council on mining and metals（ICMM）,and the occupational health risk assessment method of the international chemical control toolki（ICCT）. Results By the MOM method,the exposure risks level of laboratory workers were as follows：petroleum ether was medium risk,aromatic solvent oil,xylene,diethylene glycol methyl ether and diesel oil were low risk,and others were negligible risk.By the assignment quantitative method of the ICMM,the exposure risks level of laboratory workers were as follows：aromatic solvent oil,xylene,crude oil,petroleum ether,diethylene glycol methyl ether and isooctanol were high risks,and ethanol and diesel oil were tolerable risks.By the matrix method of the ICMM,the laboratory workplace had no or very low risks.By the ICCT method,petroleum ether in the laboratory was more likely to cause occupational hazards,and other workplaces were less likely to cause occupational hazards. Conclusions The four risk assessment methods are applicable to laboratory assessment.The laboratory gives priority to MOM risk assessment method,followed by ICMM assignment quantitative method.The ICCT assessment method and ICMM matrix method are simple to operate and can guide the laboratories of small and medium-sized enterprises to quickly carry out occupational health risk assessment.

Key words: Chemical enterprise laboratory, Chemical poison, Health risk, Risk assessment