Isopropyl Alcohol (also known as Rubbing Alcohol) is a very common disinfectant used by pharmaceutical companies, hospitals and clean rooms. It’s also used in the purification of electronics and medical device manufacture. Isopropyl Alcohol (henceforth called IPA) has different purity grades with each meant for a different use. On a whole, they’re beneficial for cleaning and disinfecting.
At Craftiviti, we sell 99.8% IPA which means that it only has 0.2% water and thus, evaporates quickly. It’s meant to be used in Melt & Pour Soap making so the alcohol will disperse bubbles and create a smooth surface, and Cold Process Soap making which helps prevent soda ash from forming when IPA sprayed within 10-15 minutes of pouring your fresh soap.
However, it should be noted that 99.8% takes a greater time to act and doesn’t kill as much bacteria as 70% IPA. Thus, for this post, we’ll be sharing how you can calculate the amount of distilled water needed to dilute your 99.8% IPA to 70% IPA.
To read more about the difference between high concentrations of IPA compared to lower concentrations, you can check out this post by Lab Pro Inc.
To make 100ml of 70% IPA from 99.8% IPA, you can use the following:
To make it simpler, all you need is:
70ml 99.8% IPA + 30ml Distilled Water = 100ml 70% IPA
You can use your phone’s calculator to calculate this for you, and you can also replace the 100ml with any desired volume.
Thanks for reading and we hope this helps ❤️
- Choudhary, Ankur, “Why 70% Isopropyl Alcohol (IPA) Is Used As Disinfectant In Pharmaceuticals?”, Pharmaguideline.Com <https://www.pharmaguideline.com/2013/11/why-70-isopropyl-alcohol-is-used-as-disinfectant.html?m=1> [Accessed 30 January 2020]
- “How Do I Make 70 Percent Isopropyl Alcohol?”, Sciencing <https://sciencing.com/how-do-i-make-70-percent-isopropyl-alcohol-12531559.html> [Accessed 30 January 2020]
- “The Difference Between Isopropyl Alcohol (IPA) 99% And 70%”, Lab Pro Inc. <https://labproinc.com/blog/chemicals-and-solvents-9/post/the-difference-between-isopropyl-alcohol-ipa-99-and-70-25> [Accessed 30 January 2020]
- “Using Alcohol To Disinfect Healthcare Surfaces – Reynard Health Supplies”, Reynardhealth.Com <https://reynardhealth.com/using-alcohol-to-disinfect-healthcare-surfaces/> [Accessed 30 January 2020]