I've been working on some palm and coconut free products for people with allergies to those substances. Before I do challenge testing I was wondering if there is any way to better preserve that I'm missing.
Here is a lotion product I have right now:
Distilled Water 80.50%
Olivem 1000 6.00%
Oil Blend 7.00% (Mango Butter and Sunflower)
Sodium Citrate 2.00%
Sodium Lactate 2.00%
Leucidal Liquid 2.00%
Xanthan Gum 0.20%
Citric Acid 0.15%
Sorbic Acid 0.15%
(I may add up to 1% fragrance, possibly Lavender EO)
I know the Leucidal Liquid is a weak antimicrobial but am struggling to find a blend that is stronger AND has no palm or coconut.
Does anyone know of a substitute? Or any suppliers who will deal with a tiny company who may have such a blend? It looks like Kem E from Akema might work, but haven't found an importer yet. Lincoln fine ingredients looks like it has some, but only in drums and didn't reply to my email. I also saw that Making Cosmetics Benzy Alcohol-DHA could work, but it sounds like it's also on the less preserving power end of the spectrum so not sure it's worth swapping out.
In a post by Mark Broussard it was mentioned that Propandiol binds water activity and is corn based, so no coconut or palm reaction, but it looks like sodium lactate can be used in a similar way so not sure there is a point in swapping Propandiol in.
I understand the Xanthan gum can help stabilize my emulsion but may weaken the preservative power. Is keeping it at a low percentage a solid approach to minimizing the potential deleterious effect on the preservative but maintaining stability?
Is it silly to have both Sodium Citrate and Citric acid? They are both related weak chelators so I feel like I may be making things complex for no discernible reason. It looks like there are stronger chelators available that may be preferable as well...
I am going to go through challenge testing to make sure what I'm making is as safe as it can be, but have concerns about the preservative system and would prefer to improve it before (maybe failing) extensive testing if possible.
If anyone has any comments I would be most appreciative! The forums and articles on this site have already been a huge help. Thanks for all the public knowledge you guys have put out there!