Sodium phytate
Binds hard-water minerals, for less soap scum.
Opens the calculator’s starter recipe, 1000 g of oils, with this additive at the dose it fills in, ready to change.
What it is
Sodium phytate is a sodium salt of phytic acid, sold for cosmetics. Lotioncrafter describes its grade as fully neutralised, with a pH near 12, while another lot’s data sheet gives a molar mass that is not fully neutralised: grades differ.
Lotioncrafter supplier or guide
How much
- 0.05–0.5 % of the batch in cosmetics generally filled in Lotioncrafter supplier or guide
The calculator fills in 0.05 % of the batch: 0.7 g for the 1000 g of oils in its starter recipe.
When and how
- Usually: in the water, before the lye.
- Also used: into the lye solution.
- Weigh it dry and dissolve it in the recipe’s own water: no extra water.
Lotioncrafter supplier or guide
What it does to the recipe
- It changes neither the lye nor the water: it is only weight in the bar.
Lotioncrafter supplier or guide
Worth knowing
- Grades differ: it is sold fully neutralised, at about pH 12, but one supplier’s lot was not. Check your data sheet. Lotioncrafter supplier or guide
- No soap source gives a dose: the one here is for cosmetics in general.
Spoons and drops
- No source weighs a spoonful of it: weigh it.
INCI name
Sodium Phytate
- CAS number
- 14306-25-3, 34367-89-0
- EC number
- 238-242-6
Guides that discuss it
Sources
Lotioncrafter, sodium phytate: 0.05–0.5 % in cosmetics; "fully neutralized and has a pH of ~12"; a supplier SDS for another lot gives a molar mass of 681.01, which is not fully neutralised.