Can I use 70 isopropyl alcohol (cas 67 63 0) to clean electronics?
Yes. It's very common to clean solder flux off a circuit board with alcohol. The higher the percentage purity the better, but even the cheaper stuff like 70% isopropyl is perfectly fine to use. You just want to make sure the board is completely dry before you power it up.
Why is 70% isopropyl alcohol (IPA) commonly used as a disinfectant?
70% isopropyl alcohol is highly favored in the pharmaceutical industry and frequently employed as a disinfectant. But why specifically 70% concentration isopropyl alcohol, rather than a higher or lower concentration? The reason behind this is closely tied to the mechanism of microbial inactivation.
70% isopropyl alcohol effectively kills microorganisms by dissolving their cell walls and membranes. Gram-negative bacteria possess a thin peptidoglycan layer in their membranes, making them more susceptible to isopropyl alcohol damage. Additionally, water acts as a catalyst in this reaction, causing denaturation of membrane proteins. The duration of contact between isopropyl alcohol and the organism is also a critical factor.
Compared to 100% isopropyl alcohol, the 70% solution evaporates more slowly, prolonging contact time with microorganisms. More importantly, 70% isopropyl alcohol penetrates cell walls at a slower rate, ensuring all proteins on the cell wall are coagulated, thereby achieving complete microbial inactivation.
70% IPA VS 90% IPA VS 99% IPA
| 70% IPA | Healthcare, sterilization, food-contact surface cleaning | |
| 90% IPA | ||
| 99% IPA | Ultra-pure, residue-free, ideal for sensitive components |
- Electronic grade 99.9%
- Third-party test reports (on request)
together with other solvents and intermediates.
| 108-94-1 | |
| 80-62-6 | |
| 2-Methoxyethanol | 109-86-4 |
| 79-09-4 | |
| 107-21-1 | |
| N, N-Dimethylacetamide (DMAC) | 127-19-5 |
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