5-Methyl-2-(methylthio)furan

CAS NO.：13678-59-6
Empirical Formula: C6H8OS
Molecular Weight: 128.19
MDL number: MFCD01208018
EINECS: 237-170-2
SAFETY DATA SHEET (SDS)
Update Date: 2026-09-12 18:56:17

What is 5-Methyl-2-(methylthio)furan?

Description

2-Methyl-5-(methylthio)furan has a very strong sulfurated odor. May be prepared from 2-methylfuran with CH3SCl; from 2-methylfuran with an organolithium compound.

Chemical properties

2-Methyl-5-thiomethylfuran has a very strong, sulfurated odor.

Occurrence

Reported found as a constituent of coffee

Preparation

From 2-methylfuran with CH3SCl; from 2-methylfuran with an organolithium compound.

Definition

ChEBI: 2-methyl-5-(methylthio)furan is a member of the class of furans that is furan substituted by methyl and methylsulfanyl groups at positions 2 and 5, respectively. It is a metabolite found in coffee and human urine. It has a role as a flavouring agent, a human urinary metabolite and a plant metabolite. It is a member of furans and a methyl sulfide.

Taste threshold values

Taste characteristics at 50 ppm: musty, mustard, onion, garlic, mushroom, coffee and savory nuances

Properties of 5-Methyl-2-(methylthio)furan

Boiling point:	79-81°C 50mm
Density	1.063
FEMA	3366 \| 2-METHYL-5-(METHYLTHIO)FURAN
Flash point:	79-81°C/50mm
Odor	at 0.10 % in dipropylene glycol. sulfury onion garlic coffee mustard horseradish
JECFA Number	1062
CAS DataBase Reference	13678-59-6(CAS DataBase Reference)
EPA Substance Registry System	Furan, 2-methyl-5-(methylthio)- (13678-59-6)

Safety information for 5-Methyl-2-(methylthio)furan

Signal word	Danger
Pictogram(s)	Flame Flammables GHS02
GHS Hazard Statements	H226:Flammable liquids
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray.