Members Directory - Chemists Corner

Andraous

Member

January 9, 2021 at 10:07 pm in reply to: Micellar water one phase preservative

ngarayeva001 said:

@Andraous I don’t get your point. If bacteria can’t grow in your formula (assuming it’s self preserving) why would you need a preservative?

I am doing chalange test for the final formula with the preservative. If results is good a cab proceed with it if not it can not be used

Andraous

Member

January 9, 2021 at 11:24 am in reply to: Micellar water one phase preservative

To. Make sure that the bacteria can’t growth inside my formula.

Andraous

Member

January 9, 2021 at 8:20 am in reply to: Any alternative of tricolsan as a Antibacterial in Hand wash

chemicalmatt said:

I’m with @Andraous : chloroxylenol is the best. Use with phenoxyethanol (and NaOH as Andraous mentioned) and you aid its solubility and turbocharge its germicidal property too. Who ever needed triclosan in the first place?

You can use with MIT MICT

Andraous

Member

January 9, 2021 at 8:18 am in reply to: Micellar water one phase preservative

Andraous said:

I am doing a chalenge test before using any preservative

In a german lab before. To make sure that the prervative is good

Andraous

Member

January 9, 2021 at 8:17 am in reply to: Micellar water one phase preservative

I am doing a chalenge test before using any preservative

Andraous

Member

January 8, 2021 at 7:42 pm in reply to: Micellar water one phase preservative

Benz3ne said:

Belassi said:

Drop the pH to 5 and sodium benzoate is perfectly adequate.

I agree, plus I’d be surprised if the product was that far off pH 5 anyway.

PH of make up remover is 4.8 till 5.5

Andraous

Member

January 8, 2021 at 7:41 pm in reply to: Micellar water one phase preservative

PhilGeis said:

Try to other biugunaide 1st - polyaminopropyl biguanide.

I will

Andraous

Member

January 8, 2021 at 5:26 pm in reply to: Micellar water one phase preservative

Sodium benzoate and benzoic acid @1.25%

Andraous

Member

January 7, 2021 at 4:47 pm in reply to: Any alternative of tricolsan as a Antibacterial in Hand wash

Chloroxylenol 0.5% dissolve it with 0.20% NAOH

Andraous

Member

January 7, 2021 at 4:18 am in reply to: shampoo viscosity

Batoul said:

Hi
I prepared a shampoo & I need to increase the viscosity. I made many samples with different NaCl concentrations. the maximum viscosity was 11000 with 0.5% NaCl.
I use a simple formula:
SLES, Cocamidopropyl Betaine, cocamide DEA, PEG-7 glyceryl cocoate, polyquaternium -10, polyquaternium-7, NaCl, Glycerin, citric acid, EDTA, frag, preservative, water
can you help me to increase the viscosity?
what is the correct ratio of Betaine - SLES - cocamide DEA to obtain the highest viscosity?
I want to reach a viscosity of 15000 to 20000 cp
Thank you in advance for your help :smiley:

I have another question
how to strengthen the odour of the fragrance without crashing the viscosity

20000 ia very high 6000 is enough

Andraous

Member

January 5, 2021 at 5:33 am in reply to: Redness and Irritation in Eye Serum

Aziz said:

Eye serum ! What is it ????. Is it for applications on eyes ? Or is it an eye related product ?
Are you maintaining the acceptable range of CFU for an eye related product.

Make up remover

Andraous

Member

January 4, 2021 at 8:19 pm in reply to: Sorbitol in place of glycerine and Diethylamine in place of triethanolamine in moisturizing cream

Andraous said:

You can use 0.15 AMP 95(2-amino-2-methyl-1-propanol) with 0.3 carbomer

Carbomer 21

Andraous

Member

January 4, 2021 at 8:18 pm in reply to: Sorbitol in place of glycerine and Diethylamine in place of triethanolamine in moisturizing cream

You can use 0.15 AMP 95(2-amino-2-methyl-1-propanol) with 0.3 carbomer

Andraous

Member

January 4, 2021 at 8:14 pm in reply to: Glycol Distearate in Shampoo as emulsifier

You can use euperlan from BASF for pearling effect

Andraous

Member

January 4, 2021 at 6:31 pm in reply to: Fragrance impact on Vscosity

Batoul said:

Thanks Androus
In case of doing stability test in normal storage conditions, how much time do I need to consider the shampoo stable?
Andraous said:

Viscosity of shampoo should be 4500-7000 cp. So you are on the safe margin. and this is normal some perfume increase the viscosity other decrease it. But you have to do stability test when you changing the perfume

Stability should be 3 months

Andraous

Member

January 4, 2021 at 5:26 pm in reply to: Micellar water one phase preservative

Thanks a lot for your help
I will try PHMB

Andraous

Member

January 4, 2021 at 5:12 pm in reply to: Cold process hair conditioner?

I have a polymer

Andraous

Member

January 3, 2021 at 6:00 pm in reply to: Cold process hair conditioner?

Carbomer
Dimethicone
Oil
Propylene glycol
Phantenol

Its good?

Andraous

Member

January 3, 2021 at 5:52 pm in reply to: Cold process O/w thin lotion stability issue

Abdullah said:

@Andraous is 2-amino-2-methyl-1-propanol just for adjusting pH or it has other function too?

Which carbomer do you prefer?

For Adjusting PH
Carbopol ultrez 21 polymer from lubrizol

Andraous

Member

January 3, 2021 at 4:28 am in reply to: Cold process hair conditioner?

Can i use carbomer to thickened

Andraous

Member

January 2, 2021 at 8:20 pm in reply to: Shampoo

Euperlan

Andraous

Member

January 2, 2021 at 8:14 pm in reply to: Cold process O/w thin lotion stability issue

Abdullah said:

@Andraous thanks
I want to add sodium lactate and sodium salicylate in this formula.
Would carbomer be stable in it?

Your welcome
You have to try but i think it’s feasible
But try to add first water + carbomer for 30 min then add 2-amino-2-methyl-1-propanol 01% to get thicken.
Then add the other ingredients
It should be stable
In case the viscosity decrease after adding the other ingredients you can re-add 2-amino-2-methyl-1-propanol 0.1%

Andraous

Member

January 2, 2021 at 1:49 pm in reply to: Micellar water one phase preservative

PhilGeis said:

Irritation effect ? Is this from experience or heresay? Glycols help but that still at minimum leaves a fungal gap. IPBC is any option - some use PHMB.

Thank k you Mr. PhilGeis
PHMB is banned since 2015 because this product is carcinogenic

Andraous

Member

January 2, 2021 at 6:00 am in reply to: FORMULA HELP

Increase SLES to 50%. Betaine to 5 % and remove NACL. Add preservative methylisothiasonine(MIT and MCIT)

Andraous

Member

January 2, 2021 at 5:44 am in reply to: Preventing Aloe Vera smell

Potassium sorbate and sodium benzoate may affect the color of the foemual after several week

Andraous

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