- CAS number
- 127-51-5
- IFRA Standard status
- Status unavailable
- Products
- 22
Last updated · 25-05-2026Record completeness90%
The information here describes the ingredient in general. Its possible sources may vary and do not necessarily show the origin or form used in a particular YUMA product. For product-specific information, check the relevant product page.
Description
Alpha-Isomethyl Ionone is a widely used fragrance ingredient known for imparting a distinct, sweet and powdery violet note to scent compositions. It belongs to the ionone family, a group of aromatic molecules that transformed perfumery. Alpha-Isomethyl Ionone is synthetically produced, allowing perfuomers to create elegant and timeless fragrances with consistency and quality. Its use helps build complex and alluring olfactory experiences, enhancing both the floral and woody facets of a scent. Modern production increasingly focuses on sustainable practices.
Additional information
- The word ionone has Greek roots! It derives from the ancient Greek word for violet, capturing the characteristic scent of this ingredient family.
- The human nose is extremely sensitive to ionones, able to detect concentrations of just a few parts per billion in the air, which is comparable to spotting a drop in an Olympic-sized swimming pool.
- Ionones were first synthesized in the late 19th century, revolutionizing the perfume industry by allowing perfumers to create the scent of violet without needing to use the flowers themselves.
CAS number
127-51-5
Other names
alpha-Methyl iononeMethyl Ionone alpha IsoAlpha-Isomethyl Iononeγ-Methylionone3-Buten-2-one,Raldeine γalpha-iso-MethyliononeIraldeine γ3-methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-Methyl-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one
Linked YUMA products
IFRA Standard status
The IFRA Standards form an industry self-regulatory system. They may prohibit or restrict the use of particular fragrance ingredients, or set specifications, according to end use. The status below reflects the IFRA data recorded for this ingredient. It is not a product certification and does not replace applicable law or assessment of the finished product.
Status unavailableRelated IFRA document
Regulatory information
Alpha-isomethyl ionone is a fully evaluated and frequently used fragrance ingredient. It has been recognized by European Union scientific bodies as a potential skin sensitizer, meaning it has the potential to trigger a skin reaction such as redness, rash, or itching. These reactions can be difficult to pinpoint and are equally likely to be caused by natural and synthetic ingredients alike. The RIFM has completed a formal safety assessment and concluded that alpha-isomethyl-ionone is a weak skin sensitizer. Based on these findings, IFRA has established standards for acceptable concentrations in various consumer products. In an extensive patch test study, 99.76 percent of participants reported no reaction to alpha-isomethyl-ionone.
