[Aanchal]

@filiz search salt curve in this forum. There’s an article by Perry.

[Aanchal]

Yes, they are banned. But aren’t they used in house hold cleaning supplies? 

[Aanchal]

Read about salt curve. Plot a curve with minimal salt and inceease in bits. It may be that any of your raw material already has salt (one supplier gave me CAPB that had some salt). Salt curve is to be plotted by you for your formulation.

Also, CAPB curve can also be plotted. It does increase viscosity but can reduce if it’s in excess.

I’m no expert, but observed these things in my formulation.

[Aanchal]

Thanks for the response. Advanced testing- how?

[Aanchal]

I have read the discussion and found it a wonderful one  ! 

I too have always wondered how soaps with little contact time claim to deliver benefits. Then recently I have started using shampoos that are sulphate, silicon and paraben free (advisable for curly hair) . I have seen visible difference in my hair. It seems some products moisturize,  some strip off moisture (oil?) from skin/hair. I am following this discussion as this is very intriguing.

[Aanchal]

@ozgirl thanks for responding.

@Pharma. What preservative may I use then? 

[Aanchal]

How is methyl paraben as the sole preservative? 

[Aanchal]

Thanks for responding @Pharma and @ozgirl.

So as long as the two are kept separate they are gonna be effective (after mixing). 

@ozgirl

I do not have the option of Isotheozolinone (viz. Kathon) as it is available only in huge quantity. Benzoate isn’t suitable for my dishwash gel as pH will be 8. What other options do I have? Any other preservative for a dishwash gel with LABSA , SLES, Betain and NaOh -chiefly these.

Or do I stick to Glutaraldehyde and mix the two liquids in the quantity immediately needed? 

[Aanchal]

@Pharma
 thanks for responding.

There is no mention of the content other than the small (100ml) bottle as the activator and the larger portion in jerry can as the ‘solution ‘.

Attaching images too. 

My intended use is as a preservative for surfactant system and not sterlization.
8

[Aanchal]

Thanks a lot @EVchem.

Yes, I had done a salt curve analysis and was sticking to the amount that served best. I had to re-do it when I changed my  CAPB supplier, and realised it already has salt and needed no additional salt.

As regards EDTA, with the salt already present, I am not able to use it in my formula amount (0.1%) but doing fine in much lower amount. 

You have mentioned citric acid qs, even that affects viscocity, what limit do you put for that? 

I have to finish the big batch of CAPB lying in the inventory, may have to continue with the same brand as well (economical). What lowest percentage of EDTA serves as chelator? 

[Aanchal]

@EVchem

SLES 

[Aanchal]

@ngarayeva001

I used hardly 0.1% but it lowered the viscosity. In my case, I know there is salt in one of the items in my formula. So the EDTA adds up to the already present salt.

[Aanchal]

Thanks @Perry ! 

[Aanchal]

@Bill_Toge Thank you!

[Aanchal]

Thanks @bil7 .

Yes, I am considering shampoo based surfactants.  Thanks a lot for confirming about food-grade dyes. I have been using them for a while and tested in sunlight too.

[Aanchal]

Thanks @Gunther.

Yes, at pH 8-9 the conversion and dissolution happens.

So, last time I added EDTA (Disodium) in the NaOH solution first at pH8. Then proceeded to other steps.

Got disodium EDTA mistakenly and have to consume it so.

[Aanchal]

Thanks @Perry.

Glad to have such information from your experience. I once changed the dye, and it made the solution turbid. I switched to the old dye brand then. 

Thank you  ! 

[Aanchal]

Thanks @ngarayeva001 

So percentage of salt in CAPB varies accross vendors but every sample will surely have it?

That means I must plot a salt curve when I change my vendor? 

[Aanchal]

Thanks @EVchem

Yes, that was my concern too. I read about deriving tetrasodium EDTA from disodium EDTA by the use of alkaline medium like NaOH.

It says, use the amount disodium EDTA equal to the amount of tetra sodium EDTA needed in the formula and dissolve it in NaOH solution. Each 5 parts of EDTA will need 1 part of NaOH to dissolve and convert.

Is that the correct idea? 

[Aanchal]

Thanks @ozgirl. 

[Aanchal]

MurtazaHakim said:

Is it not true that sodium citrate helps in cutting oil and grease from dirty dishes ?

I think that my formulation is an economical one. I am thinking of replacing CAPB by lauramine oxide and using ethoxylated nonyl phenols for enhancing the detergency. What do you think about the performance ? Will it improve or still be the same after incorporating NPE and LA ?

@m@MurtazaHakim 

Did you replace CAPB with lauramine oxide/NPE ? What was the result?

[Aanchal]

@ozgirl

Thanks.  Yes I have been visiting this site. You have a link to the image depository of this site , I saw your comment but cannot retrieve it. Please could you share that ?

[Aanchal]

Anyone?

[Aanchal]

@ozgirl . I saw your comment on a post about this. Would you like to tell more here, pls 

[Aanchal]

@Bill_Toge

Thanks again. The L1 I mentioned above is the liquid I prepared using salt. It was much thick in the stable state than L2 the commercially available dishwash liquid. 

I guess I need to increase the active ingredients’ concentration. 

I feel the molecules of the liquid need to have stronger bonding while under gravity for the liquid to appear thick rather than thinned down. I am no expert in either Physics or Chemistry though. This was my layman logic, if at all it is.