Home Cosmetic Science Talk Formulating General Air freshener Based on 99 % isopropyl alcohol and fragrance oil only !

  • Air freshener Based on 99 % isopropyl alcohol and fragrance oil only !

    Posted by bahey on December 11, 2021 at 9:57 pm

    I am trying to develop my Air Freshener which was contains 
    - 10 % fragrance oil
    - 10 % tween 20
    - preservative 
    - 20 % isopropyl alcohol 

    after problems in Solubility and separation and trying many emulsifiers and not good Stabilities and masking or weakness of the fragrance . Besides foam forming with filling by the machine. and make the floor wet after spraying by the normal trigger spray !!!!

    i am thinking 🤔  to replace the formula by : 
    - 99% isopropyl alcohol
    - fragrance oil

    What is your opinion  , what you think ?
    rather than the Cost !?

    DiscoMonkeys replied 2 weeks, 5 days ago 6 Members · 9 Replies
  • 9 Replies
  • ketchito

    Member
    December 13, 2021 at 3:29 am

    @bahey I assume the rest of your formula is mainly water, rigth? If that’s the case, I’d prefer to increase the level of your alcohol rather than to increase the solubilizer. Increasing alcohol will let fragrance bloom, while increasing the solubilizer in a water-based system will make some of the fragrance be solubilized and not available for performing properly.

  • bahey

    Member
    December 13, 2021 at 4:44 pm

    ketchito said:

    @bahey I assume the rest of your formula is mainly water, rigth? If that’s the case, I’d prefer to increase the level of your alcohol rather than to increase the solubilizer. Increasing alcohol will let fragrance bloom, while increasing the solubilizer in a water-based system will make some of the fragrance be solubilized and not available for performing properly.

    That’s which i meant .
    I had increased solubilizer and it masks the fragrance. So i am thinking do add only alcohol and fragrance and increase the price 

  • gordof

    Member
    December 16, 2021 at 2:21 pm

    hi there 

    For a normal Air Freshener, 10 % Perfum is way too much. if scent sensation is not good enough with lower concentrations you should find a better spray nozzle that distributes the product finer to the air so that it will not separate so fast from the air (Aptar has something in the portfolio for that). normally I would say perfume for an air Freshener is between 1-3 % more is a lot.

    pure Isopropyl is possible but not necessary if you dissolve your perfume in isopropyl alcohol you can start adding water in small portions until it gets foggy. then choose 5 % less water and you will be mostly fine and still able to add some water, which is more Price-efficient. 

    although you may encounter issues with labeling if you use that big amount of Iso you will be flammable and you need to label that which can be difficult because there is much non-flammable Air Freshener in the market at least as long as you are not in an Aerosol can.

    hope that helps

  • DAS

    Member
    December 16, 2021 at 10:16 pm

    Is there a reason you are not using ethanol?. You won’t be able to mask the pungent IPA odor, no matter how much fragrance you use. 
    If ethanol is not an option ask your suppliers for a low foam tensioactive. A water soluble defoamer would be easy to get and incorporate at low cost.

  • bahey

    Member
    December 17, 2021 at 11:02 pm

    Gordof said:

    hi there 

    For a normal Air Freshener, 10 % Perfum is way too much. if scent sensation is not good enough with lower concentrations you should find a better spray nozzle that distributes the product finer to the air so that it will not separate so fast from the air (Aptar has something in the portfolio for that). normally I would say perfume for an air Freshener is between 1-3 % more is a lot.

    pure Isopropyl is possible but not necessary if you dissolve your perfume in isopropyl alcohol you can start adding water in small portions until it gets foggy. then choose 5 % less water and you will be mostly fine and still able to add some water, which is more Price-efficient. 

    although you may encounter issues with labeling if you use that big amount of Iso you will be flammable and you need to label that which can be difficult because there is much non-flammable Air Freshener in the market at least as long as you are not in an Aerosol can.

    hope that helps

    Thank you too much ❤️

    I will try
  • bahey

    Member
    December 30, 2022 at 7:30 am

    Gordof said:

    hi there 

    For a normal Air Freshener, 10 % Perfum is way too much. if scent sensation is not good enough with lower concentrations you should find a better spray nozzle that distributes the product finer to the air so that it will not separate so fast from the air (Aptar has something in the portfolio for that). normally I would say perfume for an air Freshener is between 1-3 % more is a lot.

    pure Isopropyl is possible but not necessary if you dissolve your perfume in isopropyl alcohol you can start adding water in small portions until it gets foggy. then choose 5 % less water and you will be mostly fine and still able to add some water, which is more Price-efficient. 

    although you may encounter issues with labeling if you use that big amount of Iso you will be flammable and you need to label that which can be difficult because there is much non-flammable Air Freshener in the market at least as long as you are not in an Aerosol can.

    hope that helps

    Really helps me alot ,
    Many Thanks for your very valuable suggestions Dear , 

    the main reason of this option is the availability of ISO in my country plus no any separation probabilities.

    and for uses i found that the floor doesn’t get wet with normal formulas based on water , doesn’t stain the clothes and carpets .
    and I suggest the we can use less perfumes concentration.

    i am still trying 
    thanks again

  • Fekher

    Member
    December 31, 2022 at 8:13 pm

    @bahey first I go with @DAS why using ipa I guess ethanol is much better, then I will not go with @ketchito for his choice because according to my experience in such level 10% of fragrance you did not need some ingredient that bloom you fragrance so for you case I will just using peg 40 it will almost solve your problem. 

  • ketchito

    Member
    January 2, 2023 at 2:51 am

    @Fekher Solubilizers trap oils (like the ones in fragrances), so the more solubilizer you add, the more fragrance will be trapped in it (due to their partition coefficient), not letting the fragrance completely bloom upon aplication.

    When you use a mixture of water and high quantities of alcohol (like perfumes do), you let your media generate enough solvency so fragrance ingredients are solvated rather than solubilized.  

  • DiscoMonkeys

    Member
    April 2, 2024 at 9:30 pm

    Just jumping onto this old thread.

    Is there a need to add water at all? Could I just use alcohol?

    The reason I ask is for shelf life. I’m looking at adding a preservative since I’ve been making one with a higher amount of water in it. But the preservative apparently lasts 12-18 months. I wonder if I could get a longer shelf life by just using alcohol, and how that would affect the room spray?

Log in to reply.