Reaction rate measurement method for acrylic adhesive, and acrylic adhesive

Provided are a reaction rate measurement method by which the reaction rate of an acrylic adhesive can be measured accurately, even with a small quantity of a sample; and an acrylic adhesive. Using a compound having a fluorene skeleton as the internal standard substance, a sample solution containing an acrylic adhesive is separated by liquid chromatography, and an unreacted radical-polymerizable compound is detected by a UV detector. Because the compound having a fluorene skeleton exhibits high sensitivity to the UV detector, the reaction rate can be measured accurately, even with a small quantity of the sample. Moreover, as the compound having a fluorene skeleton does not participate in the acrylic adhesive curing reaction, it is possible to blend the compound into the acrylic adhesive in advance.