How do I make retinoic acid 50 mg in non-ionic emulsion base MFS ad 50g? And what is the shelf life?

On processing retinoic acid or Tretinoin biij the preparation of magistal preparations I have written an article with the title Processing of hazardous raw materials in the Officina or something like that. It was published in the Pharmaceutical Journal of Belgium, but already several years ago. I think that the APB documentation service can easily find it on   basis of the author. We have to do here with a cancerinogenic raw material and in any case the preparation does not have it carried out by female staff.