Clove Leaf, Oil (eugenia Spp.)

Clove leaf oil is an essential oil derived from the leaves of clove plants belonging to the genus Eugenia, primarily Eugenia caryophyllata. The oil is extracted through steam distillation or solvent extraction of fresh or dried clove leaves. The main chemical constituent is eugenol, typically comprising 70-90% of the oil's composition, along with other volatile compounds including β-caryophyllene, humulene, and methyleugenol. The CAS number 8015-97-2 identifies this specific botanical extract.

Clove leaf oil functions as a flavoring agent and flavoring adjuvant in the food industry. It is used in small quantities to impart clove flavor to beverages, baked goods, confectionery, meat products, and condiments. The oil is also utilized in traditional medicine and cosmetic applications, though this content focuses on food uses. Unlike clove bud oil, which is more commonly used due to higher eugenol concentration and stronger flavor profile, clove leaf oil offers a slightly milder aromatic character while still delivering characteristic clove notes.

Clove leaf oil has a long history of use in food applications and is recognized as a flavoring substance in multiple regulatory frameworks. According to available FDA records, there are zero reported adverse events associated with clove leaf oil in food use, and zero FDA recalls have been issued for products containing this ingredient. This absence of adverse event reports suggests that the ingredient has been used without documented safety concerns in the U.S. food supply.

Eugenol, the predominant component of clove leaf oil, has been extensively studied. In normal culinary use levels, eugenol is considered safe. However, high-dose eugenol exposure (well above typical food flavoring levels) has demonstrated hepatotoxic and neurotoxic effects in animal studies. The key to safety is the concentration used—food flavoring applications employ minimal quantities where these concerns are not relevant. The European Food Safety Authority (EFSA) has evaluated eugenol and established acceptable intake levels for food applications.

Individuals with sensitivities to eugenol or clove products may experience oral irritation or allergic reactions, though such cases are rare. When used as a food flavoring at standard levels, clove leaf oil presents minimal risk to the general population.

Clove leaf oil is not listed as a Generally Recognized as Safe (GRAS) substance by the FDA, meaning it has not undergone the formal GRAS notification process. However, this designation does not indicate that the substance is unsafe—rather, it reflects that formal GRAS approval documentation was not submitted or finalized. The ingredient remains available for use in foods under FDA regulations governing food additives and flavorings, provided it meets specifications and use levels consistent with food safety standards.

In the European Union, clove oil (including leaf oil) is listed in the Register of flavoring substances permitted for use in food. This approval is based on assessment of safety data and long-standing use history. Various other regulatory bodies worldwide recognize clove leaf oil as an acceptable food flavoring ingredient.

Scientific literature on clove leaf oil specifically is limited compared to clove bud oil. Most research has focused on eugenol's properties and safety profile. Studies demonstrate eugenol's antimicrobial and antioxidant properties, which contribute to its use as a food preservative and flavoring. Safety toxicology studies establish that eugenol at dietary exposure levels poses minimal risk.

The absence of adverse event data in FDA records, combined with its long historical use and regulatory acceptance in multiple jurisdictions, indicates that clove leaf oil has demonstrated a satisfactory safety record in food applications at typical flavoring concentrations.