Iso E Super

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Iso E Super
Structure formula of Iso E Super
(2R,3R)-Iso E Super structure.svg
(2R,3R)- [54464-57-2]
(2S,3S)-Iso E Super structure.svg
(2S,3S)- [144651-56-9]
IUPAC name
Other names
Amberonne; Ambralux; Boisvelone; Derambrene; Timbersilk; Methyl cyclomyrectone; 1,2,3,4,5,6,7,8-octahydro-2,3,8,8-tetramethyl-2-acetonaphthalenone; OTNE
3D model (JSmol)
ECHA InfoCard 100.053.777
Molar mass 234.38 g/mol
Appearance colorless to a pale yellow liquid
Odor amber, woody
Boiling point 134 °C (273 °F; 407 K)
1.4975–1.500 (at 20 °C)
Flash point > 100 °C (closed cup)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Iso E Super is a synthetic ketone fragrance.


Iso E Super is a very common perfume ingredient, providing a sandalwood-like and cedarwood-like fragrance, in soap, shampoo, perfumes, detergents, fabric fresheners, antiperspirants or deodorants, and air fresheners. It is also used as a tobacco flavoring (at 200–2000 ppm), as a plasticizer and as a precursor for the delivery of organoleptic and antimicrobial compounds.[1]


Iso E Super is produced commercially by Diels–Alder reaction of Myrcene with 3-Methyl-3-penten-2-one in the presence of aluminum chloride to give a monocyclic intermediate that is cyclized in the presence of 85% phosphoric acid.[2]


Carrying out the initial Diels-Alder reaction using a Lewis acid catalyst such as aluminum chloride appears to ensure that the acetyl group is at position 2 of the resulting cyclohexene adduct, which distinguished Iso E Super from other (previously patented) fragrances based on tetramethyl-acetyl-octaline. The second cyclization reaction yields a mixture of diastereomers with the general structure depicted above, the predominant ones being (2R,3R) and (2S,3S).[3]


Iso E Super may cause allergic reactions detectable by patch tests in humans[4] and chronic exposure to Iso E Super from perfumes may result in permanent hypersensitivity.[5] In a study with female mice, Iso E Super was positive in the local lymph node assay (LLNA) and irritancy assay (IRR), but negative in the mouse ear swelling test (MEST).[6]

Iso E Super is toxic and bioaccumulative in aquatic organisms and the environment,[5][7] and is suspected to be bioaccumulative in humans.[8]

No data were available regarding chemical disposition, metabolism, or toxicokinetics; acute, shortterm, subchronic, or chronic toxicity; synergistic or antagonistic activity; reproductive or teratological effects; carcinogenicity; genotoxicity; or immunotoxicity.[1]

List of products containing Iso E Super[edit]

  • The fragrance Molecule 01 (Escentric Molecules, 2005) is essentially just Iso E Super note.[9] Its partner fragrance Escentric 01 contains Iso E Super but also ambroxan, pink pepper, green lime with balsamic notes like benzoin mastic and incense.
  • The fragrance Eternity by Calvin Klein (1988) contained 11.7% Iso E Super in the fragrance portion of the formula.[1]
  • The fragrance "Paper " by Commodity, lists Iso E Super in the fragrance description on the website.
  • The male fragrance Fahrenheit (Dior, 1988) is 25% Iso E Super. (of the fragrance compound).
  • While Lalique's Eau de Parfum Perles de Lalique (Lalique, 2007) is apparently a whopping 80% Iso E Super (of the perfume compound).
  • The men's fragrance Encre Noire (Lalique, 2006) is 45% of the fragrance compound, Iso E Super.
  • The fragrance Poivre Samarcande (Hermes, 2004) contains 71% Iso E Super (of the perfume compound).
  • The very popular Terre D'Hermes (Hermes, 2006) contains 55% Iso E Super (of the perfume compound).
  • Kenzo Air (Kenzo, 2003) is 48% of the fragrance compound Iso E Super.
  • The men's fragrance Fierce Cologne (Abercrombie & Fitch, 2002) is 48% Iso E Super.
  • Home fragance "Under a fig tree" from Rituals brand.
  • Creed's Aventus (2010) contains 18% Iso E Super in its fragrance compound.


  1. ^ a b c Bonnie L. Carson (2001), 1-(1,2,3,4,5,6,7,8-Octahydro-2,3-8,8-tetramethyl-2-naphthalenyl) ethanone. Review of Toxicological Literature (PDF), National Institute of Environmental Health Sciences 
  2. ^ Karl-Georg Fahlbusch; et al. (2007), "Flavors and Fragrances", Ullmann's Encyclopedia of Industrial Chemistry (7th ed.), Wiley, pp. 45–46 
  3. ^ US 3929677, Hall, John B. & James Milton Sanders, "Perfume composition and perfume articles containing one isomer of an octahydrotetramethyl acetonaphthone", issued 1975 
  4. ^ PJ Frosch; et al. (Nov 1995), "Patch testing with fragrances: results of a multicenter study of the European Environmental and Contact Dermatitis Research Group with 48 frequently used constituents of perfumes.", Contact Dermatitis, 33 (5): 333–42, PMID 8565489, doi:10.1111/j.1600-0536.1995.tb02048.x 
  5. ^ a b Iso E Super Material Safety Data Sheet (PDF), Santa Cruz Biotechnology 
  6. ^ NTP Report on the Assessment of Contact Hypersensitivity to Iso-E Super in Female BALB/c Mice (CASRN: 54464-57-2), National Institute of Environmental Health Sciences, 2010 
  7. ^ Predicting the Bioconcentration of Fragrance Ingredients by Rainbow Trout Using Measured Rates of in Vitro Intrinsic Clearance (PDF), ACS Publications, Environmental Science & Technology, 2014 
  8. ^ Ranking of Concern from persistence, bioaccumulation and toxicity in the environmentof Pharmaceuticals and Personal Care Products (PDF) 
  9. ^ "Stagnant water, charcoal, semen... 10 smells that changed the perfume industry". The Telegraph. Retrieved 2017-06-21.