2,6,6-Trimethyl-2-cyclohexene-1,4-dione
Synonym(s):2,6,6-Trimethyl-2-cyclohexene-1,4-dione;4-Oxoisophorone;Ketoisophorone
- CAS NO.:1125-21-9
- Empirical Formula: C9H12O2
- Molecular Weight: 152.19
- MDL number: MFCD00043119
- EINECS: 214-406-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-12 09:16:39
What is 2,6,6-Trimethyl-2-cyclohexene-1,4-dione?
Chemical properties
clear yellow to orange liquid or low melting solid
Chemical properties
2,6,6,-Trimethylcyclohex-2-ene-1,4-dione has a woody, musty sweet aroma.
Occurrence
Reported found among the volatile components in saffron and in cigarette smoke. Also reported found in saffron, cognac, black tea, green tea, microbial fermented tea, lemon balm, cooked shrimp, roasted shrimp, corn oil and lamb’s lettuce.
The Uses of 2,6,6-Trimethyl-2-cyclohexene-1,4-dione
4-Oxoisophorone is one of the major components of saffron (Crocus sativus L.) and also found to be a product of degradation of carotenoids in paprika, tomato and marigold oleoresins.
Definition
ChEBI: 2,6,6-Trimethyl-2-cyclohexene-1,4-dione is a member of cyclohexenones.
General Description
2,6,6-Trimethyl-2-cyclohexene-1,4-dione is also known as 4-ketoisophorone and is the major component of saffron spice. It is a cyclic olefin and was reported as a product of the thermal degradation of β-carotene in aqueous suspension.
Properties of 2,6,6-Trimethyl-2-cyclohexene-1,4-dione
| Melting point: | 26-28 °C (lit.) |
| Boiling point: | 222 °C (lit.)
92-94 °C/11 mmHg (lit.) |
| Density | 1.03 |
| FEMA | 3421 | 2,6,6-TRIMETHYLCYCLOHEX-2-ENE-1,4-DIONE |
| refractive index | n |
| Flash point: | 201 °F |
| storage temp. | Sealed in dry,2-8°C |
| solubility | Chloroform (Slightly), Ethyl Acetate (Slightly) |
| form | neat |
| form | Liquid |
| color | Pale Yellow to Yellow Oil to Low-Melting |
| Odor | at 1.00 % in dipropylene glycol. musty woody sweet tea tobacco leaf |
| JECFA Number | 1857 |
| BRN | 2207030 |
| CAS DataBase Reference | 1125-21-9(CAS DataBase Reference) |
| NIST Chemistry Reference | 2,6,6-Trimethyl-2-cyclohexene-1,4-dione(1125-21-9) |
| EPA Substance Registry System | 2-Cyclohexene-1,4-dione, 2,6,6-trimethyl- (1125-21-9) |
Safety information for 2,6,6-Trimethyl-2-cyclohexene-1,4-dione
| Signal word | Warning |
| Pictogram(s) |
![]() Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H317:Sensitisation, Skin |
| Precautionary Statement Codes |
P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. |
Computed Descriptors for 2,6,6-Trimethyl-2-cyclohexene-1,4-dione
New Products
3-AMINO-3-(2-FLUORO-PHENYL)-PROPIONIC ACID Pentadecanoic acid Hendecanoic acid 2-AMINO-3-METHYLQUINOLINE HYDROCHLORIDE 3-Hydroxypropionitrile DL-3-Amino-3-(2-methoxyphenyl)propionic acid 5-Bromo-2-Fluoropyridine 2,3-Diamino-5-Chloropyridine 2-Amino-3-Hydroxypyridine 2,6-Diamino Pyridine 4-Amino-2-Chloropyridine 2-Hydroxy-4-Picoline 4-(4-(Dimethylamino)-1-(4-fluorophenyl)-1-hydroxybutyl)-3-(hydroxymethyl)benzonitrile 4-Bromo-3-(ethoxymethyl)benzoic acid 2,4-Dichloro-5-methoxyaniline 4,6-Dichloro-2-(propylthio)pyrimidin-5-amine N2-Isobutyryl-2'-O-methylguanosine 2-chloro-5-methylpyridin-4-amine 4-Bromobenzaldehyde 2-Chloro-6-nitro benzothiazole 2-Amino-4-phenyl-thiazole 4-Chloro-2-methyl quinoline 2-(Chloromethyl) quinazolin-4(3H)-one 5-Phenyl-[1,3,4]-thiadiazol-2-amineRelated products of tetrahydrofuran








You may like
-
4-Ketoisophorone CAS 1125-21-9View Details
1125-21-9 -
2,6,6-Trimethyl-2-cyclohexene-1,4-dione CAS 1125-21-9View Details
1125-21-9 -
2,6,6-Trimethyl-2-Cyclohexene-1,4-DioneView Details
1125-21-9 -
4-KetoisophoroneView Details
1125-21-9 -
2-Bromo-4-nitropyridine-N-oxide 52092-43-0 98%View Details
52092-43-0 -
4, 4'-Ditolylamine (or) 4,4-Dimethyl Diphenylamine 620-93-9 98%View Details
620-93-9 -
2-Bromo-5-Chloropyridine 98%View Details
40473-01-6 -
Eperisone Hydrochloride APIView Details
56839-43-1

