[Naim]

haroon said:

hi all,
give suggestion for good preservative for dish wash liquid that it will  long life and work properly.i only used EDTA .1 gm for preservative.I made dish wash liquid for business purpose. 
i am very thankful to all on this act.

You can use sodium benzoate

[Naim]

@Aziz thanks for your informative response. I now understood what the stability you talk about earlier means. Thanks once again

[Naim]

Gunther said:

pH 10 is just too high. It will surely irritate and even strip off the skin.
Lower NaOH or increase LABSA to get a pH that’s about neutral.
Pour the last 5% of the NaOH slowly, checking its pH frequently.
You can even get a slightly acidic pH 5-6 sulfonates reverting back to free LABSA.
Stay away from highly acidic pH levels < 3 from unneutralized LABSA too.

You just don’t just add salt.
You need to determine the proper amount of salt, depending on the viscosity you want.
Read about doing a salt curve.

There’s no preservative in the formula.

Thanks for your response Mr.Gunther. before getting the pH level of 10, I initially used 1.3%NaOH but the pH was at 3 and upon increasing it to 1.5% the pH level becomes 10. You have really enlighten me on how to go about it and I will surely do it based on your recommendations. As for the salt I’m still working on it

[Naim]

Aziz said:

Without CAPB foaming performance will poor . So keep CAPB in your formula . What is your presevative system ? What about stability ? Is your colour stable at that pH for a long time ?

Thanks a lot Aziz. I’m still searching for CAPB at our markets but I will surely include it. my preservative was initially formaldehyde but on coming here I realized it is no longer supportive so I decided to go with methyl paraben . After long time I do observed slight change in the colour

[Naim]

Hi respected members, I will like to express my sincere appreciation for the information you shared with me especially Mr. Gunther, Ahmad and Aziz. You really help me a lot and all I can say is thanks to you all. I was able to adjust my formula into the below compositions. The viscosity was quite ok but the pH was at 10.
LABSA  12%
NaOH.    1.5%
SLES.       5%
CDEA.       3%
EDTA.       0.2%
NaCl.        1%
Water to 100%

Can this be a good approach or there are some modifications that I need to do to make it a good recipe.

[Naim]

ozgirl said:

You need to convert your formula to percentages. Also only work in weight (g) not in volume (ml).

It sounds like there might be a problem with your calculations for scale up or possibly the difference in your manufacturing method.

If you provide some more information about the amounts used and your manufacturing method you might get more help.

LABSA 9.4%

NaOH   1.25%

SLES.    3%

EDTA.    0.1%

NaCl.     0.2%

Formalin 0.1%

Water to 100%

Color/essence qs.

[Naim]

ozgirl said:

You need to convert your formula to percentages. Also only work in weight (g) not in volume (ml).

It sounds like there might be a problem with your calculations for scale up or possibly the difference in your manufacturing method.

If you provide some more information about the amounts used and your manufacturing method you might get more help.

I will like to thank you for your response. I will convert into percentage as you suggested but for the manufacturing method it follows the sequence below

NaOH in 100ml water, EDTA and NaCl in 10ml water each. I then mix them as LABSA+NaOH Sol.+SLES+ NaCl Sol.+EDTA Sol and so on respectively.

[Naim]

Aziz said:

Gunther said:

LABSA and SLES are too low
increase to about 15% LABSA and 5% SLES to get proper viscosity
salt needs to be slowly added in 0.25% increments (dissolved in water) until the proper viscosity builds.
Better yet do a salt curve experiment.
Formalin is banned and a proven carcinogen.

In my experience 15 % LABSA is too high . 6 to 10% is fine . 5% SLES , 2% CDEA , 3 to 4 % CAPB and NaCl   may give a very good viscosity . 

Thanks a lot for your response,  but the CDEA AND CAPB will be difficult for me to get at our local markets. Besides I don’t know what CAPB stands for and it’s functions. I will take your suggestion on LABSA/ SLES and see how it will work out. Thanks once again

[Naim]

Gunther said:

LABSA and SLES are too low
increase to about 15% LABSA and 5% SLES to get proper viscosity
salt needs to be slowly added in 0.25% increments (dissolved in water) until the proper viscosity builds.
Better yet do a salt curve experiment.
Formalin is banned and a proven carcinogen.

I really appreciate your response, I will try and do the salt curve experiment but for the case of formalin I knew of other preservatives like methyl paraben but are difficult to get at my location. And isn’t 15%Labsa high

[Naim]

Please is use of CMC advisable

[Naim]

Ahmad said:

Reduce amount of labsa to 45g
Salt 10 gram
Cautic 6.5g

Thanks for your quick response. I will take it into consideration and report back my experience. thanks once again

[Naim]

Ahmad said:

Fekher said:

@ahmad glycerin is water soluble.

what best it does in formulations?

Glycerin in formulations helps to moisturize skin and make it stay soft and supple. (Nina kalau, legit.ng)

[Naim]

Aziz said:

@Gunther Will the 20% LABSA clean dirt or dirt and colour what I experienced ?

what then would be the %NaOH? will it remain the same

[Naim]

But please can u also justify on my formula

[Naim]

First of all, I will like to appreciate your responses. They are really informative. Based on what Margaret said I think tetrasodium is preferable bcos if I may be right the pH for dishwashing liquid is around 7-8.

[Naim]

Your answers would be highly welcome. Thanks