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Citric acid in shampoo
Hi,
I am formulating a shampoo with SCI and CAPB. Recently I found that PH Is high. Do I added 2.5% of citric acid. The pH is now around 4 to 5. However, i feel that the lathering ability has gone down.
Can someone throw light if citric acid lowers the lathering ability? I guess i have added a bit too much. 1 percent coud have been enough -
12 Replies
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@Sabina Are you reducing pH because you’re using an organic acid as preservative? I believe the system you have works best at a pH closer to 6.
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Hello, you should add citric acid until you reach pH around 5.5-6. Lower pH causes SCI hydrolysis and the loss of its properties
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Can you write your formula?
2.5% citric acid will reduce the pH a lot lower.
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LeoCosm said:Hello, you should add citric acid until you reach pH around 5.5-6. Lower pH causes SCI hydrolysis and the loss of its properties
Yes I guess. Also I read somewhere that CAPB loses its properties depending on the PH values. So that might be the reason. Thanks 😊
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Abdullah said:Can you write your formula?
2.5% citric acid will reduce the pH a lot lower.
It’s 10 percent of SCI, 20 percent of CAPB. Remaining aqua and few extracts, 5 percent Preservatives and 2.5 citric
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Sorry for the delayed response.
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In my experience even 0.25% citric acid reduces the pH too much.
At very low pH sci may not work very well. That is why foam has reduced.
Keep the pH around 6.
What preservative are you using? 5% is too much
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Sabina said:ketchito said:@Sabina Are you reducing pH because you’re using an organic acid as preservative? I believe the system you have works best at a pH closer to 6.I am using food grade preservation. Sodium benzoate and potassium hydroxide
Is the potassium hydroxide a typo and you meant potassium sorbate? Potassium hydroxide is a base, not a preservative.
It would appear from your comments that you do not have a pH meter?
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MarkBroussard said:Sabina said:ketchito said:@Sabina Are you reducing pH because you’re using an organic acid as preservative? I believe the system you have works best at a pH closer to 6.
I am using food grade preservation. Sodium benzoate and potassium hydroxide
Is the potassium hydroxide a typo and you meant potassium sorbate? Potassium hydroxide is a base, not a preservative.
It would appear from your comments that you do not have a pH meter?
Yes. My bad. It was a typo. I use potassium sorbate. I don’t have pH meter. But I do use pH strips though. I am using Sodium benzonate and potassium sorbate at 1 percent
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Abdullah said:In my experience even 0.25% citric acid reduces the pH too much.
At very low pH sci may not work very well. That is why foam has reduced.
Keep the pH around 6.
What preservative are you using? 5% is too much
Sorry 1 percent. 0.5 percent of sodium benzoate 0.5 percent pottasium sorbate. Also the 2.5 percent of citric acid is diluted with equal amount of water . So is should be 1.25 GM’s of citrc and 1.25 ml of water
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I am sorry to post this question here. But I am unable to find the section to post new query.
Can you highlight the adverse effect of formulating a shampoo with a higer ASM. The total ASM in my shampoo was above 20.
Miscalculation happened as i thought that asm of my CAPB was 35. Where as it was actually more concentrated up to 70:(
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