Isopropyl alcohol, also known as rubbing alcohol, is a versatile solvent that can be used in a variety of ways. It is commonly used as a disinfectant, cleaner, and as a solvent for oils and fats. However, sometimes a less concentrated form is needed for a particular task, and this is where dilution comes in. In this article, we’ll walk you through how to dilute 99 isopropyl alcohol to 91 in easy steps. The process is easy, and can be done in just a matter of minutes with the right equipment.
What You Will Need
Before we get started, here are the things you will need:
- 99% isopropyl alcohol
- Distilled water
- A clean, dry container with a lid (preferably glass)
- A measuring cup or graduated cylinder
- A stirring rod or spoon
Step By Step Guide to Diluting 99 Isopropyl Alcohol to 91
Step 1: Prepare Your Container
First, you need to ensure that your container is clean and dry. If it is not clean, wash it with soap and let it dry completely. If you are using a plastic container, make sure it is suitable for holding isopropyl alcohol. Glass is a better option if you have one.
Step 2: Measure Your Ingredients
Using a measuring cup or graduated cylinder, measure out 7 parts of isopropyl alcohol and 3 parts of distilled water. For example, if you want to make 100 ml of 91% isopropyl alcohol, you will need to mix 70 ml of 99% isopropyl alcohol with 30 ml of distilled water.
Step 3: Mix the Ingredients
Slowly pour the distilled water into the container with the 99% isopropyl alcohol. Using a stirring rod, gently stir the mixture until it is fully mixed. Be careful not to add too much water, as this will dilute the alcohol too much, and you won’t get the desired concentration.
Step 4: Label and Store the Mixture
Once the mixture is fully mixed, put the lid on the container and label it with the concentration, date, and any other relevant information. Store it in a cool, dry place away from children and pets. Make sure the lid is tightly sealed to prevent evaporation.
Tips for Diluting 99 Isopropyl Alcohol to 91
Tip 1: Use Distilled Water
It is important to use distilled water for diluting 99% isopropyl alcohol. This is because tap water contains impurities that can interfere with the concentration of the alcohol. Using distilled water ensures that the concentration is accurate.
Tip 2: Use a Glass Container
As mentioned earlier, a glass container is better for holding isopropyl alcohol than plastic. This is because plastic can react with the alcohol, causing it to degrade and evaporate more quickly.
Tip 3: Be Careful When Mixing
When mixing the alcohol and water, be gentle to prevent foaming or bubbling. If bubbles form, they can reduce the concentration of the alcohol.
Tip 4: Measure Carefully
Getting the right concentration is important for getting the desired results. Always measure your ingredients carefully to ensure that the concentration is accurate.
Frequently Asked Questions
What is the difference between 70% isopropyl alcohol and 91%?
The main difference between 70% and 91% isopropyl alcohol is the concentration. 91% isopropyl alcohol is more concentrated than 70% and is therefore more effective at disinfecting and cleaning.
Can 99% isopropyl alcohol be diluted?
Yes, 99% isopropyl alcohol can be diluted to a lower concentration if needed. However, it is important to dilute it properly and accurately to get the desired concentration.
What is the best way to store diluted isopropyl alcohol?
Diluted isopropyl alcohol should be stored in a cool, dry place away from children and pets. Make sure the lid is tightly sealed to prevent evaporation.
Is diluted isopropyl alcohol still effective?
If diluted properly, isopropyl alcohol is still effective at disinfecting and cleaning.
Can I use tap water to dilute isopropyl alcohol?
No, it is not recommended to use tap water to dilute isopropyl alcohol. Tap water contains impurities that can interfere with the concentration of the alcohol. Distilled water should be used instead.
Diluting 99 isopropyl alcohol to 91 is easy and can be done in just a few simple steps. By following the tips and guidelines, you can ensure that you get the desired concentration that is effective for your needs. Always measure your ingredients carefully, use distilled water, and store the mixture properly to ensure that it remains effective.
1. Centers for Disease Control and Prevention. (2020). Coronavirus Disease 2019 (COVID-19) Cleaning and Disinfection for Community Facilities. Retrieved from https://www.cdc.gov/coronavirus/2019-ncov/community/disinfecting-building-facility.html
2. The Clorox Company. (2021). How to Dilute Household Bleach. Retrieved from https://www.clorox.com/how-to/laundry-basics/disinfecting-with-bleach/how-to-dilute-bleach/