A plating bath is a tuned system. What upsets it is rarely the headline assay of a salt — it is a trace metal at a few parts per million, or a lot that sits a fraction away from the last one. Consistency is the specification that matters here.
Bath chemistry is sensitive to contaminants far below the level a general purity figure describes. Two lots can both meet the same assay and behave differently because of what else is in them. If your process has trace-metal limits, state them — an assay figure on its own does not answer the question.
A process qualified against one supply behaves predictably as long as that supply does. Changing to a nominally purer material can still mean requalifying. Where a process is running well, continuity of specification is usually the more valuable thing to buy.
The Certificate of Analysis is issued for the batch supplied. On a process where a bad addition costs a tank, it is worth reading before the material goes in rather than after.
The catalogue is on the TSS storefront and is searchable by name and CAS number.
Used in plating and surface-treatment formulations, as a catalyst precursor, and in patination and ceramics.
Used in metal etching and surface treatment, and as an oxidising agent in bath chemistry.
These four turn an enquiry into something that can be quoted without a round trip.