Citrus essential oils making anhydrous balm unstable

We prepared an anhydrous balm based on a formulation that one of our novice customers provided. The issue is that the balm is not uniform in viscosity. It will be hard on the surface, and very soft and somewhat liquidy towards the center no matter how long you let it cure. How do we stabilize this, especially during transport when it melts so it will return to uniformity upon cooling? The customer insists on ONLY using USDA Certified Organic raw materials. The only thing I can think of is adding in Silica Silylate as adding in more wax would just make the issue worse. Thoughts?


  • PerryPerry Administrator, Professional Chemist
    To get a useful answer to the question you should provide a list of all the ingredients in the formula.
  • MarkBroussardMarkBroussard Member, Professional Chemist
    This is a mechanical cooling issue, not necessarily an ingredient issue.  The top of the balm is in contact with the air, which I presume is conditioned, so it cools more rapidly than the interior forming the hard outer surface.

    One approach would be to put the filled containers on a chill table to expedite the cooling process.

    As for it melting then cooling during shipping ... not much you can do about that ... that is why lots of companies do not ship body butters and such products during the summer months.
    Chemist/Microbiologist formulating in the Organic & Naturals arena under ECOCert/Natural Products Assn/Whole Foods/National Organic Program guidelines focused skincare & haircare products. 

    See website for details
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