The batch of lavender soap that brought me to the forum is starting to smell off. No DOS yet but it's on its way! DeeAnna has mentioned in a few threads that lavender EO is prone to DOS. I'm wondering if linalool and linalyl acetate (interaction with NaOH produces linalool) are the culprets? If so what limits should I set in my scent formulations? Bergamot oil comes to mind... I found a spot of DOS on a neglected year+ bar of 100% bergamot (roughly 30% linalyl acetate). No hint of bergamot scent on that bar, just a bit of "off" scent. I have a bar left of a blend with bergamot at 20% (6% linalyl acetate) around 20 months old - the scent has changed, bergamot seems to fade quickly like other citrus oils, but it doesn't smell distinctly musty (although cedar and patchouli might mask some mustiness). Any thoughts?
ETA: I'll have to look up how much scent was added to each soap, but my personal max for EOs is 1 oz ppo. My guess is the bergamot blend was around 0.7 oz ppo.
ETA: I'll have to look up how much scent was added to each soap, but my personal max for EOs is 1 oz ppo. My guess is the bergamot blend was around 0.7 oz ppo.