Preliminary Risk assessment for Acrylamide and Peripheral Neuropathy

Area of Science:

• Occupational Health
• Toxicology
• Risk Assessment

Background:

• Acrylamide (ACM) is a widely used industrial chemical.
• ACM is a known neurotoxic agent causing peripheral neuropathy in exposed workers.

Purpose of the Study:

• To quantitatively assess the risk of ACM exposure to workers.
• To estimate the excess risk of impairment from ACM inhalation.

Main Methods:

• Utilized data from a study on Chinese chemical workers investigating peripheral neuropathies.
• Calculated exposure-response estimates for vibration perception threshold and nerve conduction velocities using hemoglobin adducts and air concentrations.
• Applied the benchmark dose procedure to determine excess risks of impairment.

Main Results:

• Inhalation exposure at 0.3 mg/m³ for three years is estimated to cause 1-2% excess impairment in workers.
• Exposure for 10 years at 0.3 mg/m³ (or 3 years at 1.0 mg/m³) could lead to 2-14% excess impairment.
• The study provides a method to predict risks from airborne ACM exposure for periods under 10 years.

Conclusions:

• Quantitative risk predictions for ACM-induced peripheral neuropathy are possible.
• Dermal and airborne ACM exposure risks can be estimated using Hb-adduct levels and urinary biomarkers.