benzyl alcohol equivalent to parabens

Tagged: benzyl-alcohol, paraben, shampoo

Formulating

benzyl alcohol equivalent to parabens

Posted by andres_mh89 on April 21, 2021 at 5:18 pm

Hello everyone,

I’m looking forward to use benzyl alcohol as a substitute for methyl and propyl paraben (both 0.1%) in a pet shampoo formulation.

My question is, what would be the equivalent amount of benzyl alcohol for this application?

Many thanks
Andres

Microformulation replied 3 years, 7 months ago 6 Members · 11 Replies
11 Replies

Paprik

Member
April 21, 2021 at 7:16 pm

Hi,

what else are you using as preservative? What else is in the formula?

EU limit for benzyl alcohol is 1% max.
We can’t really tell you, for example, that 0.78% or 0.48% would be enough. PET would need to be conducted.
If it’s homemade, I would stick to the upper limit, however benzyl alcohol wouldn’t be sufficient as the only preservative. In other words, it’s not a broad spectrum preservative.

Hope that helps.
andres_mh89

Member
April 21, 2021 at 8:51 pm

Hi Paprik,

I forgot to mention, I’m also including 0.1% of KATHON CG. Therefore, what could be a solid estimate of the % for benzyl alcohol to guarantee a shelf life for, let’s say 2 years?
RedCoast

Member
April 22, 2021 at 7:19 am

Do you know of any commercial pet shampoos that are paraben-free? If you look at the ingredients list, you can get a good idea on how they accomplished it.
PhilGeis

Member
April 22, 2021 at 11:24 am

With Kathon CG in a shampoo - Sodium benzoate is a much better option than benzyl alcohol or parabens. Kathon CG at 0.1 is top recommend use level. Unless there’s a rationale, think I’d drop that to 0.5-0.6.
Abdullah

Member
April 22, 2021 at 12:15 pm

@PhilGeis do you mean use kathon at %0.05 or %0.5?

What percentage of sodium benzoate should be used with %0.05 kathon in this Shampoo formula?
SLES
CAPB
Glycol distearate %1
PQ10

NACL
Tetrasodium EDTA %0.2
pH 5
PhilGeis

Member
April 22, 2021 at 1:26 pm

Right - 0.05.-0.06 - thanks!
Suggest 0.25 -0.3% Na Benzoate
Abdullah

Member
April 23, 2021 at 4:00 am

@PhilGeis thank you too!
How about %0.3 Glyceryl Caprylate with %0.05 kathon in this formula?
Microformulation

Member
April 23, 2021 at 2:32 pm

You may want to reconsider Kathon CG (methylchloroisothiazolinone, methylisothiazolinone) in a Pet Shampoo. There are some pending class action suits. It also is beginning to get pushback from the pet market. I would research these issues.
PhilGeis

Member
April 23, 2021 at 8:24 pm

Microformulation said:

You may want to reconsider Kathon CG (methylchloroisothiazolinone, methylisothiazolinone) in a Pet Shampoo. There are some pending class action suits. It also is beginning to get pushback from the pet market. I would research these issues.

Can you elaborate on the lawsuits? This is the most common preseravtive of surfactant based human consumer products (shampoos, hand washes, body washes) in the world.
PhilGeis

Member
April 23, 2021 at 9:36 pm

Saw one suit for flea and tick shampoo - pyrethroids named as culprit.
Also some stuff about isoxazoline - another heterocyclic but nowhere near an isothiazolinone. https://www.fda.gov/animal-veterinary/animal-health-literacy/fact-sheet-pet-owners-and-veterinarians-about-potential-adverse-events-associated-isoxazoline-flea

any cocnern for a formaldehyde releaser?
Microformulation

Member
April 23, 2021 at 10:43 pm

I will tag in @Belassi