What Does (I) Stand for After a Chemical Compound?

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The notation "(I)" after a chemical compound like H2SO4 is actually a typographical error; it should be "(l)", which signifies that the substance is in a pure liquid state. The standard notations for states of matter in chemistry are (g) for gas, (l) for liquid, (s) for solid, and (aq) for aqueous solutions. Additionally, "(I)" can refer to the oxidation state in compounds like Copper(I) Iodide, indicating the charge of the copper atom.
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I was wondering what (I) means when it is written after a chemical compound, for example, H2SO4 (I). Thanks!
 
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It's not an I, it's an L, and indicates that the Hydrogen Sulfate is in a pure liquid state.

It couldn't be an I, as the four states are (g), (l), (s), and (aq).

Now, there is a case where (I) is used in a compound, such as Copper(I) Iodide, and that indicates the charge of the copper atom.
 

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