Dimethicones - Chemists Corner

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Dimethicones

Posted by 1501 on June 22, 2021 at 4:48 am

The dimethicone has a wide range of molecular weight, from low (0.65 cst) to high (30,000 cst, for examples). Is there any relationship between the molecular weight and the volatility of dimethicone? And can I add the dimethicone to my cream/ lipstick at the temperature of 80 degree C?
Thank you in advance

Abdullah replied 2 years, 10 months ago 5 Members · 10 Replies
10 Replies

ngarayeva001

Member
June 22, 2021 at 11:43 am

They stopped being called “Dimethicone” below 1.5 and are volatile. You can safely use Dimethicone 5 and above in the heated oil phase.
You should avoid heating:
- Cyclomethicones (D4, D5, D6)
- Phenyl Trimethicone
- Dimethicones below 1.5 (I think 0.65 is called Disiloxane)
Not silicones but also shouldn’t be heated:
- Isododecane
- Cetiol Ultimate (Undecane, Tridecane)
ngarayeva001

Member
June 22, 2021 at 11:46 am

Dimethicone 5, 100, 350, 500 and 1000 are quite useable. 1.5 is used in makeup, but I am not sure if it’s used in emulsions.
Abdullah

Member
June 23, 2021 at 12:31 am

5cs and above that is not volatile. Below 5 is volatile.

By the way, which book is this?
jemolian

Member
June 23, 2021 at 6:19 am

@Abdullah it should be the text from the lipids module from Institute of Personal Care Science
Paprik

Member
June 23, 2021 at 7:04 pm

jemolian said:

@Abdullah it should be the text from the lipids module from Institute of Personal Care Science

You sure? I’m studying with IPCS and there is nothing like this. Unless it is some kind of old version? But we have nothing like this there. (I have already done lipids). [Which kinda sucks, haha. This looks gooood]
jemolian

Member
June 24, 2021 at 12:44 am

@Paprik there shouldn’t be that many changes to the text i think.

It’s from this page https://www.dropbox.com/s/e3mor9eu436rtiu/Screen%20Shot%2006-24-21%20at%2008.43%20AM.PNG?dl=0

*I’ll delete it after a few days.
Paprik

Member
June 24, 2021 at 3:54 am

jemolian said:

@Paprik there shouldn’t be that many changes to the text i think.

It’s from this page https://www.dropbox.com/s/e3mor9eu436rtiu/Screen%20Shot%2006-24-21%20at%2008.43%20AM.PNG?dl=0

*I’ll delete it after a few days.

Oh gosh, you are right!! This is embarrassing I guess I’ll re-visit this unit.

Thanks for reminding me!
Abdullah

Member
June 24, 2021 at 12:21 pm

@jemolian can we purchase this book alone or we should purchase their whole program to get the book?
jemolian

Member
June 24, 2021 at 1:02 pm

@Abdullah they do have quite many modules and structured formats for different formulas as different files. Will recommend dropping them an email to about about the book though, I believe they can be purchased separately. There should be info on their site on the ones available.
Abdullah

Member
June 24, 2021 at 1:07 pm

@jemolian thanks