3-Mercapto-2-methylpenta-1-ol
- CAS NO.：227456-27-1
- Empirical Formula: C6H14OS
- Molecular Weight: 134.24
- MDL number: MFCD08741458
- EINECS: 927-385-6
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-28 06:13:08
What is 3-Mercapto-2-methylpenta-1-ol?
Chemical properties
3-Mercapto-2-methylpentan-1-ol (racemic) is a highly odorous mercaptan with an onion or leek-like aroma. Flavor quality was reported to strongly depend on concentration.
Occurrence
Reportedly present in onion.
Preparation
Prepared by a highly diastereoselective aldol reaction using a chiral auxiliary process with further derivatization yielding the enantiopure compound.
Definition
ChEBI: 3-Mercapto-2-methylpentanol is an alkanethiol.
Aroma threshold values
At low concentrations (0.5 ppb), a pleasant, meat-broth, sweaty, onion and leek-like odor can be perceived.
Properties of 3-Mercapto-2-methylpenta-1-ol
| Boiling point: | 205.0±23.0 °C(Predicted) |
| Density | 0.959±0.06 g/cm3(Predicted) |
| FEMA | 3996 | 3-MERCAPTO-2-METHYLPENTAN-1-OL (RACEMIC) |
| pka | 10.50±0.10(Predicted) |
| form | clear liquid |
| color | Colorless to Light yellow |
| Odor | at 0.10 % in propylene glycol. sulfurous onion |
| JECFA Number | 1291 |
Safety information for 3-Mercapto-2-methylpenta-1-ol
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H227:Flammable liquids H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation |
| Precautionary Statement Codes |
P210:Keep away from heat/sparks/open flames/hot surfaces. — No smoking. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P332+P313:IF SKIN irritation occurs: Get medical advice/attention. P337+P313:IF eye irritation persists: Get medical advice/attention. P370+P378:In case of fire: Use … for extinction. P403+P235:Store in a well-ventilated place. Keep cool. |
Computed Descriptors for 3-Mercapto-2-methylpenta-1-ol
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