Specification, formulation and compliance notes for the people who
actually have to buy and use these ingredients. Written in-house, and
revised when the regulation moves.
Steviol glycosides 95% and Reb A 95% are different materials at the same price. Which number belongs on a purchase order, and which line to read on the COA before goods-in signs for it.
Stevioside carries three glucose units, Reb A four, Reb D five, Reb M six. That ladder explains most of the price gap and most of the taste difference between them.
Reb M is usually produced by bioconversion, and organic standards treat that differently from leaf extraction. The scope line on the certificate is the one that decides it.
Both are sold as sweet tea extract. Different species, different CAS numbers, different sweetness. Ordering the wrong one is a returned container, not a discussion.
Class 1, 2 and 3 solvents carry different limits and different consequences. What the GC result on your certificate should say, and what it usually leaves out.