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 key ingredient specifications for importing neroli oil into the US are Linalool 39–53% (minimum ≥39%), Linalyl acetate 9–20% (minimum ≥9%), density 0.8630–0.8760, with batch-to-batch GC-MS variation ≤3% (>5% direct reject) and FDA/MoCRA, IFRA and Lacey Act compliance documents.

The key specification of michelia leaf oil is Linalool content ≥70% as a hard gate (below is excluded before price comparison), with perfumery grades requiring (R)-Linalool ee ≥90%, methyl eugenol below IFRA limits, and batch consistency verified by batch-matched third-party GC-MS reports with Linalool variation ≤±2%.

The key specification of michelia leaf oil is Linalool content ≥70% as a hard gate (below is excluded before price comparison), with perfumery grades requiring (R)-Linalool ee ≥90%, methyl eugenol below IFRA limits, and batch consistency verified by batch-matched third-party GC-MS reports with Linalool variation ≤±2%.

The core specification of blue gum eucalyptus oil is 1,8-cineole content of 70–85% (FCC grade ≥70%, USP grade ≥85%). A supplier passes acceptance only when the batch stays stable in the mid-range of 75–82% with batch-to-batch deviation ≤1.5 percentage points, verified through batch-matched third-party GC-MS and a COA with 15+ test items.