The ingredient statement
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The rule
The ingredient statement is normally required on the front panel of the label.
Why that is unusual
Cosmetics, cleaning products and foods all put the ingredient list on a back or side panel. Here it competes directly with the brand name and the product claim for the most valuable area on the package.
Active and inert
The statement distinguishes the active ingredients, named with their percentages, from the inert ingredients given as a total. The actives are what the registration is about.
Percentages have to add up
Actives plus inerts total 100 percent. It is arithmetic, it is checkable by anyone, and it is the kind of error that survives several rounds of proofing because nobody adds it up.
It binds the formula to the label
A percentage on a front panel is a statement about what is in the bottle. A reformulation that moves an active by a fraction of a percent is a label change.
Plan the front panel in three parts
Brand and product identity, the ingredient statement, and the signal word with its hazard statements. Those three share the front and the rest goes elsewhere.
Which rules out some containers early
A narrow cylinder with a small front panel cannot carry three blocks at a legible size. Measure the panel against the three before choosing between bottles, not after.
Inerts are not inactive
The word means they are not the registered active, not that they do nothing. Solvents, surfactants and carriers all sit in that total, and several of them are the reason the container has a chemical resistance problem at all.
The statement is also your supplier check
To state the percentages you have to know them, which means a certificate of analysis on every incoming active rather than a trade name and a promise. A producer who cannot evidence the numbers on the front panel has a supply problem before a labeling one.