A health hazard term listed on a Material Safety Data Sheet (MSDS) that indicates allergic-like reaction in some people after repeated exposure is __________.

Correct Answer: Option A — sensitizer

Sensitizers are chemical agents that cause a substantial proportion of exposed people or animals to develop an allergic reaction in normal tissue after repeated exposure. This is a critical health hazard classification under OSHA Hazard Communication standards, which govern the information provided on Safety Data Sheets for maritime personnel.