Toddler had some vanilla extract

My husband was watching our 2 year old and he’s recently figured out how to open our cabinets child locks. My husband was using the bathroom and came into the kitchen to our son with the vanilla extract in his hand with the lid off and licking his lips. We don’t know how much he drank or if he just tasted it on rim or what. And I don’t know how much was in there to know if he drank any. Should I be worried? I’m super anxious about it. It’s been about a half hour and he’s acting completely normal.