The key specifications of white michelia oil are Linalool content ≥55% (premium ≥70%), free acid value ≤5.0 (limit ≤7.0) and ester value ≥25.0 (minimum ≥20.0). Linalool content is the first decision factor that determines aroma strength, ingredient grade, price band and formula compatibility for US manufacturers.

The core acceptance indicators for tea tree oil are measured Terpinen-4-ol ≥40% under ISO 4730:2017, 1,8-Cineole ≤15%, p-Cymene ≤2%, batch variation below ±2% (SD ≤±1.5%), with OOS investigation on any out-of-spec value and chiral R/S analysis required to prove natural origin.

The core acceptance indicators for tea tree oil are measured Terpinen-4-ol ≥40% under ISO 4730:2017, 1,8-Cineole ≤15%, p-Cymene ≤2%, batch variation below ±2% (SD ≤±1.5%), with OOS investigation on any out-of-spec value and chiral R/S analysis required to prove natural origin.

The core acceptance indicators for tea tree oil are measured Terpinen-4-ol ≥40% under ISO 4730:2017, 1,8-Cineole ≤15%, p-Cymene ≤2%, batch variation below ±2% (SD ≤±1.5%), with OOS investigation on any out-of-spec value and chiral R/S analysis required to prove natural origin.

The core acceptance indicators for tea tree oil are measured Terpinen-4-ol ≥40% under ISO 4730:2017, 1,8-Cineole ≤15%, p-Cymene ≤2%, batch variation below ±2% (SD ≤±1.5%), with OOS investigation on any out-of-spec value and chiral R/S analysis required to prove natural origin.

The core acceptance indicators for tea tree oil are measured Terpinen-4-ol ≥40% under ISO 4730:2017, 1,8-Cineole ≤15%, p-Cymene ≤2%, batch variation below ±2% (SD ≤±1.5%), with OOS investigation on any out-of-spec value and chiral R/S analysis required to prove natural origin.