α-Isomethyl ionone

α-Isomethyl ionone
Names
	IUPAC name (3E)-3-methyl-4-(2,6,6-trimethylcyclohex-2-en-1-yl)but-3-en-2-one
	Other names α-Cetone; Cetone Alpha; Isomethyl-α-ionone
Identifiers
CAS Number	127-51-5;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:179835;
ChEMBL	ChEMBL3183353;
ChemSpider	4522510;
ECHA InfoCard	100.004.407
EC Number	204-846-3;
PubChem CID	5372174;
UNII	9XP4LC555B;
CompTox Dashboard (EPA)	DTXSID10859248 DTXSID7027047, DTXSID10859248 ;
	InChI InChI=1S/C14H22O/c1-10-7-6-8-14(4,5)13(10)9-11(2)12(3)15/h7,9,13H,6,8H2,1-5H3/b11-9+ Key: JRJBVWJSTHECJK-PKNBQFBNSA-N;
	SMILES CC(=O)C(\C)=C\C1C(C)=CCCC1(C)C;
Properties
Chemical formula	C14H22O
Molar mass	206.3239
Appearance	liquid
Density	0.93 gcm −3 (20 °C)
Boiling point	93 °C (199 °F; 366 K) (3.1 mmHg)[1]
Solubility in water	0.064 g/L
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	irritant, environmental hazard
	GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H315, H317, H319, H411, H412
Precautionary statements	P261, P264, P272, P273, P280, P302+P352, P305+P351+P338, P321, P332+P313, P333+P313, P337+P313, P362, P363, P391, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

α-Isomethyl ionone, also known as α-cetone, is a synthetically made and naturally occurring organic compound found in Brewer's yeasts or the species known as Saccharomyces cerevisiae. The compound is an isomer of methyl ionone. Alpha-isomethyl ionone can be colorless or pale-straw coloured liquid. Its primary scent is flowery and secondary scent is violet. It may also have a woody or orris-like scent. and is often used in flavouring and cosmetic industries for example, aftershave lotions, bath products, hair care products, moisturizers, perfumes, shampoos and skin care products. It is also an ingredient used in Chanel No. 5, and other branded products such as Fidji by Guy Laroche. Perfume fragrances that α-isomethyl ionone is used in are for example, amber, chypre, violet, mimosa, reseda, iris, orris, cyclamen, chypre, berries, woody notes, ylang-ylang, leather, orange, nut, pistachio, muscatel, and tobacco.