delta-Nonalactone
Synonym(s):5-Hydroxynonanoic acid, lactone
- CAS NO.：3301-94-8
- Empirical Formula: C9H16O2
- Molecular Weight: 156.22
- MDL number: MFCD00036500
- EINECS: 221-974-5
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-04-03 14:17:14
What is delta-Nonalactone?
Description
Hydroxynonanoic acid, δ-lactone has a mild, nut-like odor and a fatty, milk-creamy taste. May be prepared by microbiological reduction of the corresponding keto acids, by a patented process.
Chemical properties
Hydroxynonanoic acid, δ-lactone has a mild, nut-like odor and a fatty, milk-creamy taste
Occurrence
Reported as responsible for the off-flavor in milk fat. Also found in melon, butter, chicken fat, grilled beef, cured pork, pork fat and liver, beer, malt and bourbon whiskey, cognac, rum, white wine, black tea, asparagus, mango, starfruit, mountain papaya and cooked shrimps
The Uses of delta-Nonalactone
Suggested uses are in curry, nut, tomato, tropical, caramel and dairy flavors. In fragrance applications, this compound delivers apricot, butter, grape, passion fruit, plum, tea green and tobacco notes.
Preparation
By microbiological reduction of the corresponding keto acids; by a patented process
Definition
ChEBI: 6-Butyltetrahydro-2H-pyran-2-one is a delta-lactone.
Taste threshold values
Taste characteristics at 10 ppm: creamy, coconut, lactonic, sweet and dairy-like with milky nuances.
Properties of delta-Nonalactone
| Melting point: | -26°C |
| Boiling point: | 115-116 °C2 mm Hg(lit.) |
| Density | 0.893 g/mL at 25 °C(lit.) |
| vapor pressure | 0.41-0.75Pa at 20-25℃ |
| FEMA | 3356 | HYDROXYNONANOIC ACID, DELTA-LACTONE |
| refractive index | n |
| Flash point: | 112 °F |
| storage temp. | Sealed in dry,Room Temperature |
| form | Liquid |
| color | Colorless to Almost colorless |
| Specific Gravity | 0.99 |
| Odor | at 100.00 %. coconut creamy sweet milky coumarin |
| JECFA Number | 230 |
| BRN | 114460 |
| CAS DataBase Reference | 3301-94-8(CAS DataBase Reference) |
| NIST Chemistry Reference | «DELTA» nonalactone(3301-94-8) |
| EPA Substance Registry System | 2H-Pyran-2-one, 6-butyltetrahydro- (3301-94-8) |
Safety information for delta-Nonalactone
| Signal word | Danger |
| Pictogram(s) |
 Flame Flammables GHS02 |
| GHS Hazard Statements |
H225:Flammable liquids |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P403+P235:Store in a well-ventilated place. Keep cool. |
Computed Descriptors for delta-Nonalactone
| InChIKey | PXRBWNLUQYZAAX-UHFFFAOYSA-N |
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