LR grade refers to a specific standard of purity for chemical reagents. These chemicals are suitable for laboratory use. According to the reference material, LR grade chemicals refer to chemicals that meet the specifications outlined by the Laboratory Reagent (LR) grade. LR grade chemicals are often used in laboratory settings for analytical and research purposes. (Reference A)
In simpler terms, LR grade signifies that a chemical is of sufficient purity to be reliably used in lab experiments and analyses.
