An Unlabeled Bottle of Clear Liquid Is Found on a Shelf

Multiple Choice

An unlabeled bottle of clear liquid is found on a shelf. A sign on the shelf says, "Tris-EDTA Buffer, pH 8.0." What is the proper course of action?

A) Use the liquid as Tris-EDTA.
B) Taste the liquid to make sure it isn't saline.
C) Dispose of the liquid.
D) Measure the pH. If it is 8.0, proceed to use the liquid as Tris-EDTA.