Overview
Methyl Ionone is a synthetic aromatic ketone belonging to the ionone family, first developed in the early 20th century as a violet fragrance alternative. It has become a staple in modern perfumery due to its versatile floral-woody scent profile and excellent blending properties with other fragrance ingredients. The compound exists in several isomeric forms (alpha, beta, gamma), with α-Isomethylionone being the most commercially significant. Its production typically involves aldol condensation of citral with methyl ethyl ketone, followed by cyclization. Industrial production is dominated by specialized fragrance manufacturers in Europe and Asia.
Physical and Chemical Properties
Methyl Ionone presents as a viscous liquid with a characteristic floral-violet odor reminiscent of iris and orris root. Its molecular structure features an unsaturated cyclic ketone, contributing to both its aromatic qualities and chemical stability. The compound shows good resistance to oxidation and maintains its fragrance profile under normal storage conditions. Technically, it has a refractive index of 1.495-1.505 and flash point around 110°C, making it suitable for various formulation processes. Its low vapor pressure ensures lasting fragrance performance in end products. The material is incompatible with strong oxidizers but demonstrates good compatibility with most common cosmetic and detergent ingredients.
Main Applications
The primary use of Methyl Ionone is in fine fragrance composition, where it serves as a middle note in floral and woody accords. Perfumers value it for its ability to add depth and persistence to violet, iris, and rose formulations. Approximately 70% of global production is consumed by the perfume industry. In functional products, it finds application in soaps, shower gels, and hair care products due to its stability in alkaline conditions. The cosmetics industry utilizes it in creams and lotions at concentrations typically below 1%. Industrial applications include air fresheners and fabric softeners, where its substantivity on textiles is particularly valued.
Safety and Storage
Methyl Ionone is classified as non-hazardous under GHS standards, though proper handling procedures should still be observed. The material should be stored in stainless steel or aluminum containers away from direct sunlight and heat sources. Typical shelf life is 24 months when stored properly between 15-25°C. From a regulatory perspective, the compound is approved by IFRA for use in fragrances with no current restrictions. It is listed on the EU Cosmetics Inventory and complies with REACH requirements. Material Safety Data Sheets should always be consulted for specific handling instructions, particularly regarding ventilation requirements in industrial settings.
B2B Procurement Guide
When sourcing Methyl Ionone, buyers should specify the desired isomer ratio (typically 60-70% alpha isomer content) and purity level. Industrial quantities are commonly available in 25kg, 180kg, and IBC (1000kg) containers. Key purchasing considerations include batch-to-batch consistency and compliance with international fragrance standards. Reputable suppliers should provide certificates of analysis including gas chromatography results, optical rotation values, and residual solvent content. For large-volume contracts (5+ metric tons annually), prices are often negotiable. Buyers should verify the supplier's ability to provide regulatory documentation for target markets, particularly for EU and North American compliance.
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