BP Grade Epsom Salt, also known as Magnesium Sulphate was named after the town of Epsom in Surrey where it was originally prepared from the town’s mineral waters
What does BP grade mean? BP stands for British Pharmacopoeia and means that the Epsom Salt is produced to the pharmaceutically accepted grade.
The BP grading is being phased out and is being replaced by the FCC grading. This means it meets the specification laid down in the United States Food Chemicals Codex.