Diluting isopropanol – here’s how

Isopropanol is mainly available in stores in a 99.9% concentration. For some purposes, such as cleaning, it is better to reduce the concentration to 70%. However, you should make a few preparations before diluting it.

• You should have the following materials ready: a bottle of 99.9% isopropanol, a suitable transfer container, protective clothing, and distilled water.
• Protective equipment should include gloves, safety goggles, and respiratory protection. An unsuitable container can be damaged by the isopropanol, which is why aluminum or plastic containers are generally unsuitable.
• A lower concentration can be achieved by diluting the solution. However, you can also purchase 70% isopropanol in stores.

There are a few things to keep in mind when diluting isopropanol, which is why it’s not quite as simple as reducing it from 99.9% to 70%. In this section, we’ll also discuss why distilled water is better suited for this purpose than tap water.

• When diluting isopropanol, you must take into account the volume contraction effect. When you mix two substances, the volume decreases. That is why mixing 70% isopropanol and 30% water is not correct.
• Use the DAC/NRF formula finder to calculate quantities. To dilute isopropanol, add 63.1 grams of isopropanol to 100 milliliters of water. This will give you a concentration of 70%.
• It is best to use distilled water for filling, as it is more suitable for cleaning than tap water. Distilled water does not contain any salts or dissolved substances. It can absorb dirt particles better.