Most of them, in fact all the IPA that I see selling in those camera shops did not state the percentage alcohol for IPA. Hmmm.. maybe some trade secret. ha..... The industrial one used in semiconductor is 99.9%, pharmacy one is around 70%.
i think the ipa you get at the pharmacy is not very pure, it leaves a slight reside after cleaning, ive notice this when i was doing fiber optic termination. we tried to cut training costs by using pharmacy grade ipa and in some cases, the link didnt pass.
Are you referring to Isopropyl Alcohol? If so, are you aware that at 70% concentration, Isopropyl Alcohol is capable of stripping the anti-static, anti-glare coating off of a CRT monitor? I've done this several times using the anti-septic wipes purchased from pharmacies.