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Question

Posted on: March 6 2013

All formulas with Triethanolamine now appear to be banned... (VNL. Reimbursement). To what extent can this be replaced by trometamol like BV in the following formula? Paraffin Wax 30

Vaseline White 20
Almond oil 19
Sorbitol 15
Urea 3
Glycerol 15
stearic acid 3
Triethanolamine 7
Cetylalkohol 3
Aqua ad 300g
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Answer

In this skin milk, the emulsifier being triethanolaminestearate is formed in situ. I do not know of the use of Trometamol, which replaces Triethanolamine in Carbomeergel, with stearic acid but rather of ammonia. But in the composition of question 315 I believe that there is too much triethanolamine. Common in Stearaatcremes is not to neutralize all stearic acid, which is therefore in large quantity, with one or another base. But here is for the neutralization of 3 G stearic acid approximately 1.5 g triethanoamine required. I do not know what the surplus could serve. Due to the lack of intervention by the RIZIV for Triethanolamine, it can be replaced by ammonia. Here it means 1.7 g diluted ammonia (10% m/m). The pH will still be slightly alcalisch, yet not as high as in the presence of an excess triethanolamine.
should trometamol still be suitable then usually 1.35 g triethanolamine is replaced by 1 G trometamol.