Once again; not being a chemist - Thought it might be beneficial to "Look Up" the difference between Methanol and Isopropyl alcohol.
Methanol consists of a methyl group (a carbon with three hydrogens attached) connected to a hydroxyl group. The formula is CH3OH.
Isopropyl alcohol, also known as isopropanol, consists of an isopropyl group–this can be described as two methyl groups attached to a carbon–bonded to a hydroxyl (OH) group. The formula for isopropyl alcohol is C3H7OH.
The additional carbon and Hydrogen content in Isopropyl is readily visible in the Chemical Formula; not sure how their actions may affect the No.7 powder.