Can I use this water-soluble lavender oil directly on my skin without mixing it with a carrier oil?

While this product is adapted for mixing with water, it is still a concentrated aromatic product. The source notes you should not apply it undiluted unless the manufacturer specifically allows it for that purpose. For topical cosmetic use, such as when skin feels irritated, dry or rough, or for scalp use, it is a standard safety practice to first dilute a few drops in a larger amount of a suitable base—like a unscented lotion, shampoo, or a carrier oil—before applying to the body or hair. This water-dispersible format is designed to blend more evenly in water-based applications, which can be convenient for adding to a bath or a final hair rinse, but for direct skin contact, proper dilution helps manage skin reactivity. If your skin is very reactive, testing cautiously on a small area first is advised.