Antiperspirant - Chemists Corner

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Formulating

Antiperspirant

Posted by Lainee on August 9, 2017 at 1:29 am

So our company is planning on launching personal care products. One of these is the antiperspirant. Here’s a rundown:

A. Water - 18.70
Cellosize(Hydroxyethyl Cellulose)- 0.20

B. AZP-940- 17

C. Ethanol- 42.50
Propylene Glycol- 2.0
Glucam P20(PPG-20 Methyl Glucose Ether)- 1

D. Frag. - 0.60

E. Sensidin DO(Propylene glycol (and) Ethylhexylglycerin (and) Octenidine HCl) - 1.0

Is ethanol at that percentage is necessary? Or should I ask, Is ethanol needed there? I have a gut feeling that it is not. Thanks

zaidjeber replied 7 years, 3 months ago 4 Members · 10 Replies
10 Replies

OldPerry

Member
August 9, 2017 at 2:12 am

What is AZP-940? I’m guessing Carbomer?

what is the active AP ingredient?

Since there is no preservative, yes a high level of alcohol is needed.
Lainee

Member
August 9, 2017 at 5:47 am

@Perry AZP is aluminum zirconium pentachlorohydrate.
Lainee

Member
August 9, 2017 at 5:52 am

@Perry but ethanol will dry out the skin.
OldPerry

Member
August 9, 2017 at 1:43 pm

Ethanol incorporated into a formula is not proven to dry out the skin.

Here is a relevant discussion. https://chemistscorner.com/does-alcohol-cause-skin-irritation/

Does alcohol cause skin irritation?
Chemist77

Member
August 10, 2017 at 6:44 am

You need that much Ethanol there which is just about right and the purpose is to dry the product in a very less time. Generally you add (I see you already have it) humectant to counter that drying effect, residue is a big issue here though and you will have to optimize the a/p salt in the formula.
Lainee

Member
August 11, 2017 at 2:03 am

@Chemist77 a bit “flaky”?
Chemist77

Member
August 11, 2017 at 10:06 am

Yup that flaky thing.
zaidjeber

Member
August 14, 2017 at 2:10 am

@Lainee I never heard of AZP/ aluminum zirconium pentachlorohydrate, but i know that aluminium zirconium tetrachlorohydrex gly is being used in deodorants. However, the latter does stain the cloths yellowish and causing stiffening of underarm part of the cloths (in my personal experience).
@Lainee did you face the same problems with AZP?
Lainee

Member
August 14, 2017 at 6:11 am

@zaidjeber how can I avoid this?
zaidjeber

Member
August 14, 2017 at 7:06 am

@Lainee use aluminum chlorohydrate 15%