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Adilkeirat said:

I made a low grade laundry detergent using SLES, LABSA, sodium silicate,  Nacl and citric acid. The problem is it keeps creating a phase(the watery part on top) and the other solution at the bottom. What could be the possible reason? 

Try neutralizing LABSA to pH 7 first

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grapefruit22 said:

What is the best practice? Do you calibrate pH meters before each use?

Every day first thing after stepping inside the lab. And annually via a third party calibration service provider.

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Asad_Nazir said:

Hello everyone,
I am facing problem in liquid dishwash

It decolorized after three months from yellow to white liquid. What is possible cause. 
Dishwash composition is:

Lapsa, soda ash

SLS, SLES, TSP

Nacl , Cocobetaine. Lemon color

Preservatives:

EDTA, methyl parabin
Ph-8,  Specific gravity- 1.05
What is its solution?

Did you neutralize LABSA to pH 7 before adding all the other ingredients?

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MarkBroussard said:

@Queen_Benin2468

The idea behind Pineapple Extract is that it may contain some trace bromelain in the extract to provide exfoliation.  In reality it’s just a claim ingredient that won’t really do much, if anything.  Just add 1% to your water phase.  Bromelain itself smells strongly like the sewer. 

@M@MarkBroussard Currently Bromelain is being promoted as a replacement for Papain in skin lightening. Do you think these two are comparable or can be used interchangeably?

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Hi @Iwana. A product is only as good as the ingredients used in it, AND the process by which it is made. From my experience, yes there is a right time and duration to homogenize an emulsion. Too much homogenization may destroy the structure of a cream, as you can see from your trials. Better stick with the procedure that passed your stability test. After all, knowing the “right” time is all but trial and error until you get what works for you. Goodluck!

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Another one you might want to use is a solution of Sodium Hydroxide or Potassium Hydroxide. Dosage almost the same to thicken your formula

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here in the Philippines we use DMDMH for leave on and rinse off applications (but not for oral care products) at 0.4%. some use this alone, or combines with Euxyl PE9010 and it works just fine. the reason why we use this is 

1. stable at a wide pH range
2. very cheap
3. can be used for virtually any product 

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hi. would you like to share the other ingredients used in your formula?

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@jackleon80s as long as you have the right amount of preservative you don’t have to store it in a refrigerator. Room temperature would be fine. What is your preservative btw?

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agree with @Bill_Toge. @Lainee try lowering PEG 40 to 0.50% since your alcohol is already at 35% the risk of having a cloudy solution is low already. You wouldn’t need too much PEG-40 since it seems to me you don’t have to solubilize any oil at all.

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@Lainee maybe you can increase the level of your emollients PG and Glucam P20? My experience with antiperspirants is they get sticky when emollients are below 3% total.

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According to Gabriella Baki and Kenneth Alexander’s book “Introduction to Cosmetic Formulation and Technology” the sciences involved in Cosmetic Science are: Anatomy, Physiology, Chemistry, Pharmacology and Dermatology. Really good book for the cosmetic geek.

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Hi five to you buddy! I am also a graduate of Biochemistry not so long ago (please don’t ask the exact year). When I graduated I didn’t know I was going to be destined to work as R&D for a cosmetic ingredients company. Some years have passed and I continued to work for the cosmetics industry as chief R&D. I suggest you stay where you are right now since you are already in a cosmetics manufacturing firm. And I’m telling you, everything about cosmetics you will learn when you work in a manufacturing company. From formulation development, packaging development, regulations, marketing, business development, etc.  While studying for your Masters (i envy you!) it is good to learn the practical aspects simultaneously from your current company. Who knows, while studying you might be transferred to a Chemist position if you stay and learn long enough. I heard promotions are faster in other countries compared to where I am located right now. Best of luck to you. <span>:smile:</span>

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@biochemist101 from my experience the FD&C Red 33 pink colorant is quite hard to maintain as it really has a tendency to fade away. Maybe Lavanya might solve your problem.

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Salty water as in water from the sea? Or Distilled water + salt?

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I am very fond of Optasense RMAIS, Vicoptime SE and Viscoptima PL from Croda. Depending on your claims, any of these three is sufficient already, just add water, fragrance, actives and preservative.

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@DRBOB@VERDIENT.BIZ procetyl aws is a water soluble surfactant. If there is no water in the formula, i think plain fragrance+silicone can provide the clear finished product you desire @biochemist101. I agree with @Chemist77, you should add fragrance in small increments to see up to what level the clarity can hold up.

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@camden82 are you trying to make a water based pomade then?

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@Belassi may I suggest Crodazoquat MCC from Croda. This one is positioned to condition all types of hair, may it be curly, blonde or brunette. 

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Disperse Xanthan gum in Glycerin first at room temperature until completely dissolved. Then add this mixture into your water phase before heating.

I am also puzzled by the high percentage of Avena sativa oil. Adding 12% post emulsification might be a concern. This high percentage can be emulsified more efficiently if it is added into the oil phase. If you want to get away with adding it post emulsification due to its heat sensitivity, try lowering it to 1-2%.

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@Shubh123 I read that Phenyl Benzimidazole Sulfonic Acid has a required pH to be stable, around pH 7 if i’m not mistaken. You need to neutralize your mixture to dissolve the carbomer back into the solution and stabilize the sunscreen.

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@Hicham for your hard surface cleaner, do you use surfactants already? Like SLS, SLES, etc?

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@Shubh123 that is an awful lot. Are you sure you are going to use this much?

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Consider adding a buffering system. pH may go below 3.5, as can be seen from your list. Check Purac BF S30.

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Yes you can. This is typically added in the oil phase of an emulsion before heating to 70 to 80 C. Just be aware that too much of this still leads to discoloration over time.