Members Directory - Chemists Corner

PhilGeis

Member

November 24, 2024 at 10:59 am in reply to: What % of Sodium Benzoate (and) Potassium Sorbate in Euxyl K712?

2500-3000 ppm of each - buy think you need also something more directed at Gram negative bacteria - maybe phenoxy.

This reply was modified 2 months ago by PhilGeis.

PhilGeis

Member

November 23, 2024 at 8:39 am in reply to: What % of Sodium Benzoate (and) Potassium Sorbate in Euxyl K712?

These 2 organic acid compose a pretty weak system. What is your pH?

PhilGeis

Member

November 20, 2024 at 6:44 pm in reply to: Who regulates ethanol in cosmetics? FDA? IFRA? ATF?

Primary as oz girl commented the ATF CFR 27 chapter 21.

https://www.ecfr.gov/current/title-27/chapter-I/subchapter-A

ecfr.gov

eCFR :: 27 CFR Chapter I Subchapter A -- Alcohol

PhilGeis

Member

November 12, 2024 at 4:49 am in reply to: DEODORANT- some help, please

Total BS

“…anti-microbial properties especially beneficial for the use in AP/Deo formulations. It reliably reduces odor-causing bacteria…”

as is the preservative system

This reply was modified 2 months, 1 week ago by PhilGeis.

PhilGeis

Member

November 12, 2024 at 4:34 am in reply to: Preservative systems for skin creams

BHT is not an antimicrobial preservative.

What’s pH?

PhilGeis

Member

November 11, 2024 at 10:17 am in reply to: Solve the smell problem of fermented extract?

Is this your ferment or some thing you purchased?

PhilGeis

Member

November 9, 2024 at 9:05 am in reply to: "…no bacteria or mould can live in 31% MgCl2 solution" says manufacturer

brine - saturated aq. solution - manuf is full of feces.

https://www.hou.usra.edu/meetings/modernbrines2021/pdf/6006.pdf

PhilGeis

Member

November 9, 2024 at 8:59 am in reply to: Seeking Advice on Washing Machine Liquid Formulation Issues

What’s pH? Might need a preservative.

PhilGeis

Member

November 9, 2024 at 7:02 am in reply to: Use of CMI MI and DMDM hydantoin at high pH by Uniliver

Your concern is CMI stability at high pH?

Household/industrial products are typically preserved vs contamination in making, not in use. So CMI loss is not a factor. For example, the high surfactant, high pH, squeeze package of hand dish wash largely eliminate in-use contamination risk because microbes that can grow under those conditions are not found in use. They adapt in the relatively poorly controlled (vs cosmetic) manufacturing systems and come in with ingredients such as salt.

PhilGeis

Member

November 8, 2024 at 2:34 pm in reply to: Preservation Need for High Glycol Product?

what’s pH?

PhilGeis

Member

November 8, 2024 at 10:25 am in reply to: Preservation Need for High Glycol Product?

0.94 - about at the edge of Gram negative inhibition, not enough for other bacteria and fungi.

not picking on you - but how “microbiome friendly”?

PhilGeis

Member

November 8, 2024 at 5:01 am in reply to: Feminine Wash

add something for fungi and Gram + bacteria

PhilGeis

Member

November 5, 2024 at 5:00 am in reply to: Sanitizer - efficacy data drops when we apply more

What “efficacy” is that? What test and what data?

PhilGeis

Member

November 3, 2024 at 4:11 am in reply to: Air freshener Based on 99 % isopropyl alcohol and fragrance oil only !

neither needs a preservative

PhilGeis

Member

October 27, 2024 at 3:02 pm in reply to: combining preservatives

Sure!

This reply was modified 2 months, 4 weeks ago by PhilGeis.

PhilGeis

Member

December 6, 2024 at 7:56 am in reply to: Is there a preservative in this?

pointed out these were boosters -so why do they think effective. Answer was paste and cut from supplier for “Hydroguard” (composed of the 2), no data.

PhilGeis

Member

December 3, 2024 at 11:17 am in reply to: Is there a preservative in this?

Asked ’em on facebook - right they said propanediol and hydroxyacetophenone.

PhilGeis

Member

December 3, 2024 at 7:49 am in reply to: Is there a preservative in this?

Neither/both will not preserve.

To Perry’s point such small/startup brands not only screw up out of ignorance (a generous interpretation of these formulas), they can forget to add things like preservatives (e.g.https://www.drunkelephant.com/voluntaryrecall.html) and certainly can’t be relied upon to establish safety in formulation or ingredients.