Price is not the variable to optimize on first. The real question: does the manufacturer understand your quality requirements, and can they consistently produce to that spec?
Three things to ask any supplier of Paraffin Wax:
First: what’s the test method for purity? HPLC area percent, external standard, which column, which solvent? A supplier who can answer clearly is one who actually runs the test.
Second: what’s the shelf life under recommended storage conditions, and what’s the basis for that claim — accelerated stability data, or convention? There’s a significant difference.
Third: can you provide batch records for the last three production runs? Not every supplier will say yes. But asking tells you how they operate.
If those three questions get vague answers, keep looking.