A high-quality fragrance oil should accurately capture and represent the intended scent. The fragrance should be true to its description and evoke the desired aroma when used in candles.

Strength of scent throw: Scent throw refers to the intensity and diffusion of the fragrance when the candle is burned. Good-quality fragrance oils should provide a noticeable and pleasant scent throw that fills the room or area where the candle is being burned.

Stability and performance: Candle fragrance oils should be stable and perform well under normal burning conditions. They should not cause discoloration, separation, or other unwanted effects in the candle wax.

Longevity of fragrance: A quality fragrance oil will retain its scent throughout the candle's burn time, ensuring a consistent fragrance experience from the beginning to the end.

Compatibility with candle wax: The fragrance oil should be formulated to work well with the specific type of candle wax being used. Different waxes (such as soy, paraffin, or beeswax) may require different formulations of fragrance oils for optimal performance.