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 B — sensitizer

A sensitizer is a chemical that causes 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 found on Safety Data Sheets (SDS) to warn personnel of potential long-term immunological responses.