Reed diffuser oils typically use a solvent carrier such as dipropylene glycol (DPG) or isopropyl myristate (IPM) at a fragrance load near 20 to 35 percent, which lets the scent wick evenly up rattan reeds. Ultrasonic diffusers need water-soluble or solubilized blends instead. AJ Cosmo Labs lets you filter manufacturers by carrier type and format.
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