Which of the following is NOT considered a typical reaction characteristic found in the MSDS?

The selection of heat resistance as the option that is NOT typically found in a Material Safety Data Sheet (MSDS) is correct because MSDS documents primarily focus on the hazardous properties and handling instructions of materials. The MSDS provides essential information regarding the reactions and risks associated with a substance, which typically include characteristics like flammability, explosiveness, and the release of toxic fumes or gases.

Flammability pertains to how easily a substance can ignite and burn, while explosiveness describes the potential for a substance to undergo a rapid chemical reaction, producing gas and heat. The release of toxic fumes or gases is crucial information for safety when handling or using a material, as it informs users about the potential health risks involved.

In contrast, heat resistance is not usually regarded as a characteristic tied to safety data, but rather more of a physical property that describes how well a material can withstand heat without degrading or changing its structure. While heat resistance is indeed a valuable property in material selection and application, it does not directly relate to the hazardous reaction characteristics that are the primary focus of an MSDS. This distinction helps clarify why heat resistance is the most fitting response to the question.