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US. NIOSH: Pocket Guide to Chemical Hazards ValueMaterial Type STEL 1 ppmBenzene TWA 0.1 ppm ValueComponents Type STEL 1 ppmBenzene (CAS 71-43-2) TWA 0.1 ppm Biological limit values ACGIH ValueComponents Determinant Specimen Sampling Time 500 µg/g t,t-Muconic acid Creatinine in urine *Benzene (CAS 71-43-2) ACGIH Biological Exposure Indices ValueMaterial Determinant Specimen Sampling Time 25 µg/g S-Phenylmerca pturic acid Creatinine in urine *Benzene ValueComponents Determinant Specimen Sampling Time 25 µg/g S-Phenylmerca pturic acid Creatinine in urine *Benzene (CAS 71-43-2) * - For sampling details, please see the source document. Exposure guidelines US - California OELs: Skin designation Benzene (CAS 71-43-2) Can be absorbed through the skin. US ACGIH Threshold Limit Values: Skin designation Benzene (CAS 71-43-2) Danger of cutaneous absorption Explosion-proof general and local exhaust ventilation. Good general ventilation should be used. Ventilation rates should be matched to conditions. If applicable, use process enclosures, local exhaust ventilation, or other engineering controls to maintain airborne levels below recommended exposure limits. If exposure limits have not been established, maintain airborne levels to an acceptable level. Provide eyewash station and safety shower. Appropriate engineering controls Individual protection measures, such as personal protective equipment Wear safety glasses with side shields (or goggles). Wear face shield if there is risk of splashes.Eye/face protection Skin protection Wear appropriate chemical resistant gloves. Viton® gloves are recommended.Hand protection Skin protection Wear appropriate chemical resistant clothing. Use of an impervious apron is recommended.Other If engineering controls do not maintain airborne concentrations below recommended exposure limits (where applicable) or to an acceptable level (in countries where exposure limits have not been established), an approved respirator must be worn. Chemical respirator with organic vapor cartridge and full facepiece. Respiratory protection Wear appropriate thermal protective clothing, when necessary.Thermal hazards Observe any medical surveillance requirements. When using do not smoke. Always observe good personal hygiene measures, such as washing after handling the material and before eating, drinking, and/or smoking. Routinely wash work clothing and protective equipment to remove contaminants. General hygiene considerations 9. Physical and chemical properties Appearance Liquid.Physical state Liquid.Form Colorless to pale yellow.Color Gasoline.Odor Odor threshold Not available. Benzene Prepared by 3E Company 914414 Version #: 03 Revison date: 09-January-2023 Print date: 09-January-2023 4 / 9