Members Directory - Chemists Corner

Abdullah

Member

January 18, 2025 at 1:05 am in reply to: why don’t i feel the conditioning effect in my conditioner formula

You have too much conditioning ingredients

Abdullah

Member

January 16, 2025 at 4:13 am in reply to: Analysing Unilever shampoo MSDS

@PhilGeis pH is 5.5-6.5

Package is flip top cap bottle.

Is it possible that they have more ingredients in there and didn’t mention it in MSDS?

@ketchito hehe that is enough.

Is it this patent or any other patent?

WO2014023440A1

Abdullah

Member

January 15, 2025 at 8:15 pm in reply to: Curcylic 40 (60% Cocamidopropyl Dimethylamine. 40% Salicylic Acid)

Sci is not stable at lower pH and Curcylic 40 may have reduced its ph too much.

Abdullah

Member

January 13, 2025 at 8:49 pm in reply to: Is AEO-9 (C12-14 E9) good for body wash and hand soap?

It may reduce foam

Abdullah

Member

January 9, 2025 at 4:17 am in reply to: Why is formula A stable but formula B not?

Formula A is also has more viscosity

Abdullah

Member

January 8, 2025 at 2:45 am in reply to: Which

Can i edit the title to ” which preservative is stronger for this cationic emulsion?”.

It hasn’t been written when i wrote it.

Abdullah

Member

January 7, 2025 at 8:35 pm in reply to: Deformulating/Reformulating Help Needed…

Deformulating/Reformulating what type of products? Please specify it.

Different types of product need different types of expertise and knowledge.

For example if you want to Deformulate/Reformulate a soap then our friend @mikethair has experience.

Abdullah

Member

January 5, 2025 at 10:40 pm in reply to: US FDA recalls of cosmetic and personal products from 2011-2023

Thanks a lot for the file.

By the way, what is manufacturing/storage issues that has caused the recall?

Abdullah

Member

January 3, 2025 at 4:49 am in reply to: Happy New Year to all you great folks.

Happy new year to all you great people

Abdullah

Member

January 18, 2025 at 12:57 am in reply to: When to add ~25% cold water in this emulsion?

Thanks

What if we don’t mix it at all after homogenization until temperature is down to 50°c?

Is it necessary to slow mix?

Abdullah

Member

January 18, 2025 at 12:52 am in reply to: Analysing Unilever shampoo MSDS

@Perry44 thanks

When you said ”A big company like Unilever would use up to 1% silicone.”, do you mean usually silicone is used @ ≤1%?

Abdullah

Member

January 16, 2025 at 11:06 pm in reply to: When to add ~25% cold water in this emulsion?

So it is better to take a break from high shear between 55-60°c?

Is it 55-60°c because of melting point of fatty alcohol or they don’t have any connection?

Abdullah

Member

January 16, 2025 at 8:10 pm in reply to: Curcylic 40 (60% Cocamidopropyl Dimethylamine. 40% Salicylic Acid)

That is the same

Abdullah

Member

January 15, 2025 at 8:37 pm in reply to: When to add ~25% cold water in this emulsion?

Thanks

At what temperature do structures usually form?

Currently i make two emulsions.

BTMS+ FA which is heated to 90°c.

SLS+FA which is heated to 60°c.

Abdullah

Member

January 15, 2025 at 8:23 pm in reply to: Unilever patent homogenizes emulsion at <40°c. Why?

Thanks

Abdullah

Member

January 13, 2025 at 10:58 pm in reply to: Help with hair conditioner/leave in formula viscosity

Can i ask why that temperature and not cooler?

Abdullah

Member

January 12, 2025 at 8:56 pm in reply to: Can i mix CMI MI with glycerin before adding to final product?

Thanks

No plan on holding it.

Abdullah

Member

January 10, 2025 at 8:52 am in reply to: Why is formula A stable but formula B not?

Made 3 more batches

1% SLS: 5% FA

0.8% SLS: 4% FA

0.6% SLS: 3% FA

pH was 12 for all of them.

Will check the stability

Abdullah

Member

January 9, 2025 at 9:17 pm in reply to: Why is formula A stable but formula B not?

Liquid SLS has pH ~6 and no citric acid needed to adjust it’s pH.

1% powder SLS solution in filtered water has pH ~13.

How can i calculate the free base?

1% SLS powder needs 0.8% citric acid to reduce pH to 6 and during this it creates a lot of foam so it may have a lot of free base.

I will make another batch without citric acid and see what happens.

Abdullah

Member

January 7, 2025 at 8:45 pm in reply to: US FDA recalls of cosmetic and personal products from 2011-2023

It is interesting that most of products were contaminated with gram- , a few with gram+ , very little with candida, and nothing with mold.

Does manufacturing contamination happen in this order like mostly gram- and and very little fungi or it is just a coincidence that they were contaminated like this?

Abdullah

Member

January 7, 2025 at 9:41 am in reply to: US FDA recalls of cosmetic and personal products from 2011-2023

Yes and i think it is the easiest to kill too. Just add some EDTA+ phenoxy or a formaldehyde releaser and it is dead. I don’t know why they haven’t done so and is there so much gran negative.

Abdullah

Member

January 6, 2025 at 9:43 am in reply to: What is RSSL( relative surface silicone deposition level)

https://ifscc.org/abstracts/conditioning-by-cationic-polymers-on-asian-hair/

Here it is.

It also hase this formula for it

RSSL = Silicone peak height (Si–CH3) at 796.5 cm–1/

Hair reference peak area at 940.1 cm–1 to 919.9 cm–1

ifscc.org

CONDITIONING BY CATIONIC POLYMERS ON ASIAN HAIR - IFSCC

Abdullah

Member

January 6, 2025 at 9:35 am in reply to: US FDA recalls of cosmetic and personal products from 2011-2023

Thanks 🙏

Abdullah

Member

December 30, 2024 at 11:06 pm in reply to: Viscosity lose from amodimethicone micro emulsion

Thanks

Is there any method of adding this silicone emulsion to prevent this interaction ?

By ”rheology modifier” you mean thickeners like hpmc, xanthan etc or cocamide MEA?

Abdullah

Member

December 29, 2024 at 8:41 pm in reply to: help with bubbles

Use use ctac/FA at 1/4 ratio for Maximum viscosity

Abdullah

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