ChemicalBook > CAS DataBase List > 2,5-Dimethylthiophene

2,5-Dimethylthiophene

Product Name
2,5-Dimethylthiophene
CAS No.
638-02-8
Chemical Name
2,5-Dimethylthiophene
Synonyms
Thiophene, 2,5-dimethyl-;2,5-Thioxene;2,5-DIMETHYTHIOPHENE;2,5-DIMETHYLTHIOPHENE;2,5-Dimethylthiophene >2 5-DIMETHYLTHIOPHENE 98+%;2,5-DIMETHYLTHIOPHENE, 98.5%;2,5-Dimethylthiophene, 98.50%;2,5-Dimethylthiophene USP/EP/BP;2,5-DiMethylthiophene, 98.5% 25ML
CBNumber
CB6181350
Molecular Formula
C6H8S
Formula Weight
112.19
MOL File
638-02-8.mol
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2,5-Dimethylthiophene Property

Melting point:
-63°C
Boiling point:
134 °C/740 mmHg (lit.)
Density 
0.985 g/mL at 25 °C (lit.)
refractive index 
n20/D 1.512(lit.)
Flash point:
75 °F
storage temp. 
Keep in dark place,Inert atmosphere,Room temperature
form 
Liquid
Specific Gravity
0.985
color 
Clear colorless to slightly yellow
Odor
at 0.10 % in propylene glycol. nutty sulfury
Odor Type
sulfurous
biological source
synthetic
Water Solubility 
Insoluble in water. Soluble in alcohol, ether and benzene.
BRN 
106450
InChIKey
GWQOOADXMVQEFT-UHFFFAOYSA-N
LogP
2.523 (est)
CAS DataBase Reference
638-02-8(CAS DataBase Reference)
NIST Chemistry Reference
Thiophene, 2,5-dimethyl-(638-02-8)
EPA Substance Registry System
2,5-Dimethylthiophene (638-02-8)
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Safety

Hazard Codes 
Xn,F,Xi
Risk Statements 
10-37-20/22
Safety Statements 
23-24/25-16-36-33-29-7/9-3/7/9
RIDADR 
UN 1993 3/PG 3
WGK Germany 
3
HazardClass 
3
PackingGroup 
II
HS Code 
29349990
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H226Flammable liquid and vapour

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P403+P235Store in a well-ventilated place. Keep cool.

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N-Bromosuccinimide Price

Sigma-Aldrich
Product number
D188603
Product name
2,5-Dimethylthiophene
Purity
98.5%
Packaging
25g
Price
$178
Updated
2025/07/31
Sigma-Aldrich
Product number
W515507
Product name
2,5-Dimethylthiophene
Purity
≥98%
Packaging
25g
Price
$121
Updated
2022/05/15
Sigma-Aldrich
Product number
W515507
Product name
2,5-Dimethylthiophene
Purity
≥98%
Packaging
100g
Price
$249
Updated
2022/05/15
Sigma-Aldrich
Product number
74182
Product name
2,5-Dimethylthiophene
Purity
analytical standard
Packaging
1ml
Price
$69
Updated
2022/05/15
TCI Chemical
Product number
D1591
Product name
2,5-Dimethylthiophene
Purity
>98.0%(GC)
Packaging
5mL
Price
$26
Updated
2025/07/31
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2,5-Dimethylthiophene Chemical Properties,Usage,Production

Chemical Properties

clear colorless to slightly yellow liquid

Uses

2,5-Dimethylthiophene is used as an intermediate in organic synthesis.

Definition

ChEBI: 2,5-Dimethylthiophene is a member of thiophenes.

Synthesis Reference(s)

The Journal of Organic Chemistry, 20, p. 1363, 1955 DOI: 10.1021/jo01127a012

General Description

2,5-Dimethylthiophene is a volatile flavoring compound that has been identified in the essential oil of onion. It is reported to be one of the sulfur-containing compounds formed via Maillard reaction/Strecker degradation of cysteine with furaneol.

2,5-Dimethylthiophene Preparation Products And Raw materials

Raw materials

2,5-Hexanedione Phosphorus pentasulfide Carbon tetrachloride

Preparation Products

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2,5-Dimethylthiophene Suppliers

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View Lastest Price from 2,5-Dimethylthiophene manufacturers

Shaanxi Dideu New Materials Co. Ltd
Product
2,5-Dimethylthiophene 638-02-8
Price
US $0.00-0.00/KG
Min. Order
1KG
Purity
98.0%
Supply Ability
10000KGS
Release date
2025-06-26
JINING XINHE CHEMICAL CO., LTD
Product
2,5-Dimethylthiophene 638-02-8
Price
US $0.00-0.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
10ton
Release date
2024-07-16
Henan Fengda Chemical Co., Ltd
Product
2,5-Dimethylthiophene 638-02-8
Price
US $9.00-0.90/KG
Min. Order
1KG
Purity
99%
Supply Ability
g-kg-tons, free sample is available
Release date
2024-01-23

638-02-8, 2,5-DimethylthiopheneRelated Search:

Thifensulfuron Tetrahydrothiophene Cephalothin sodium 2,2'-BITHIOPHENE-5-CARBOXALDEHYDE 5-Methyl-2-thiophenecarboxylic acid 2,2':5',2''-TERTHIOPHENE Tetraphenylthiophene 3-Acetyl-2,5-dimethylthiophene 5-(2-PYRIDYL)THIOPHENE-2-CARBOXYLIC ACID 5-Methylthiophene-2-carboxaldehyde 2-ACETYL-5-CYANOTHIOPHENE 3,4-DIMETHYLTHIOPHENE-2,5-DICARBONITRILE BBOT 2-[1-METHYL-3-(TRIFLUOROMETHYL)PYRAZOL-5-YL]-THIOPHENE-5-CARBOXALDEHYDE 1-(5-Methyl-2-thienyl)ethan-1-one 2,5-Thiophenedicarboxylic acid Methyl 3-amino-5-(4-chlorophenyl)thiophene-2-carboxylate 3,4-DIMETHYLTHIENO[2,3-B]THIOPHENE-2-CARBALDEHYDE

  • 2,5-DIMETHYLTHIOPHENE
  • 2,5-DIMETHYLTHIOPHENE, 98.5%
  • 2 5-DIMETHYLTHIOPHENE 98+%
  • 2,5-DIMETHYTHIOPHENE
  • 2,5-Dimethylthiophene, 98.50%
  • Thiophene, 2,5-dimethyl-
  • 2,5-Thioxene
  • 2,5-DiMethylthiophene, 98.5% 25ML
  • 2,5-Dimethylthiophene &gt
  • 2,5-Dimethylthiophene USP/EP/BP
  • 638-02-8
  • 630-02-8
  • 638-02-9
  • 638028
  • C6H8S
  • Building Blocks
  • Thiophenes
  • Heterocyclic Building Blocks
  • thiophene Flavor
  • Building Blocks
  • Heterocyclic Building Blocks
  • Thiophenes
  • Alphabetical Listings
  • C-D
  • Flavors and Fragrances
  • Thiophene&Benzothiophene
  • Heterocyclic Compounds
  • Thiophens