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638-02-8

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2,5-Dimethylthiophene
Cas No: 638-02-8
No Data 100 Gram 100 Metric Ton/Year JINHUA HUAYI CHEMICAL CO., LTD. Contact Supplier
2,5-Dimethylthiophene Manufacturer/High quality/Best price/In stock
Cas No: 638-02-8
USD $ 3.0-3.0 / Kilogram 1 Kilogram 1-100 Metric Ton/Month Dayang Chem (Hangzhou) Co.,Ltd. Contact Supplier
High quality 2,5-Dimethylthiophene supplier in China
Cas No: 638-02-8
No Data No Data Metric Ton/Day Simagchem Corporation Contact Supplier
2,5-DIMETHYLTHIOPHENE
Cas No: 638-02-8
No Data 1 Kilogram Metric Ton/Day Henan Allgreen Chemical Co.,Ltd Contact Supplier
2,5-dimethylthiophene
Cas No: 638-02-8
No Data 10 Milligram Amadis Chemical Co., Ltd. Contact Supplier
2,5-Dimethylthiophene
Cas No: 638-02-8
No Data No Data No Data Chemwill Asia Co., Ltd. Contact Supplier
Manufacturer supply CAS 638-02-8 with best quality
Cas No: 638-02-8
USD $ 139.0-210.0 / Kilogram 1 Kilogram 1000 Kilogram/Day Zhuozhou Wenxi import and Export Co., Ltd Contact Supplier
BLOOM TECH Advanced API/Technology support 2,5-DiMethylthiophene CAS 638-02-8
Cas No: 638-02-8
No Data 1 Gram 3 Metric Ton/Month Shaanxi BLOOM TECH Co.,Ltd Contact Supplier
Thiophene,2,5-dimethyl- 638-02-8
Cas No: 638-02-8
No Data 1 Kilogram 10000 Metric Ton/Month Shanghai Upbio Tech Co.,Ltd Contact Supplier
Monad Supply 2,5-DIMETHYLTHIOPHENE Cas No: 638-02-8
Cas No: 638-02-8
USD $ 1.0-3.0 / Gram 10 Gram 1000 Kilogram/Month Wuhan Monad Medicine Tech Co.,LTD Contact Supplier

638-02-8 Usage

Chemical Properties

clear colorless to slightly yellow liquid
InChI:InChI=1/C6H8S/c1-5-3-4-6(2)7-5/h3-4H,1-2H3

638-02-8 Well-known Company Product Price

Brand (Code)Product description CAS number Packaging Price Detail
Aldrich (D188603)  2,5-Dimethylthiophene  98.5% 638-02-8 D188603-100G 3,701.88CNY Detail
Aldrich (D188603)  2,5-Dimethylthiophene  98.5% 638-02-8 D188603-25G 1,272.96CNY Detail
Alfa Aesar (A10869)  2,5-Dimethylthiophene, 98+%    638-02-8 250g 7899.0CNY Detail
Alfa Aesar (A10869)  2,5-Dimethylthiophene, 98+%    638-02-8 25g 985.0CNY Detail
Alfa Aesar (A10869)  2,5-Dimethylthiophene, 98+%    638-02-8 10g 404.0CNY Detail

638-02-8SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 13, 2017

Revision Date: Aug 13, 2017

1.Identification

1.1 GHS Product identifier

Product name 2,5-Dimethylthiophene

1.2 Other means of identification

Product number -
Other names Thiophene,2,5-dimethyl

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Food additives -> Flavoring Agents
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:638-02-8 SDS

638-02-8Synthetic route

5-methylthiophene-2-carboxaldehyde
13679-70-4

5-methylthiophene-2-carboxaldehyde

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

Conditions
ConditionsYield
Stage #1: 5-methylthiophene-2-carboxaldehyde With hydrazine hydrate Wolff-Kishner-Huang Minlon Reduction;
Stage #2: With potassium hydroxide
96%
With potassium hydroxide; hydrazine hydrate; ethylene glycol
With potassium hydroxide; hydrazine
2,5-hexanedione
110-13-4

2,5-hexanedione

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

Conditions
ConditionsYield
With Lawessons reagent at 140℃; for 1h;87%
With diphosphorus pentasulfide In tetrachloromethane for 4h; Heating;76%
With diphosphorus trisulfide
2,5-dimethylfuran
625-86-5

2,5-dimethylfuran

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

Conditions
ConditionsYield
With hydrogenchloride; hydrogen sulfide In acetic acid Ambient temperature; further acids, solvents;80%
With hydrogenchloride; zinc sulfide In ethanol at 40℃; Product distribution; Further Variations:; Temperatures; Reagents; concentrations of reagents; time; Substitution;80%
With hydrogenchloride; zinc sulfide In ethanol at 40℃; Substitution;80%
thiophene
188290-36-0

thiophene

Dimethyldisulphide
624-92-0

Dimethyldisulphide

A

2-Methylthiophene
554-14-3

2-Methylthiophene

B

2,3,4-trimethylthiophene
1795-04-6

2,3,4-trimethylthiophene

C

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

Conditions
ConditionsYield
With zeolite HZSM-5 at 300℃; under 760.051 Torr; for 0.00236111h; Time; Flow reactor;A 19%
B 18%
C 12%
With HZSM-5 zeolite (SiO2/Al2O3 = 34) at 300℃; under 760.051 Torr; for 2h; Catalytic behavior; Temperature; Flow reactor; Gas phase; Inert atmosphere;
2-Methylthiophene
554-14-3

2-Methylthiophene

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

Conditions
ConditionsYield
With iodine; mercury(II) oxide Behandeln mit Methyljodid und Natrium in Aether;
Multi-step reaction with 2 steps
1: Einleiten von Bromdaempfen
2: sodium
View Scheme
Multi-step reaction with 2 steps
1: trichlorophosphate / 20 °C
2: hydrazine hydrate
View Scheme
2-bromo-5-methyl thiophene
765-58-2

2-bromo-5-methyl thiophene

methyl iodide
74-88-4

methyl iodide

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

Conditions
ConditionsYield
With sodium
5-methyl-thiophene-2-carbaldehyde semicarbazone
131392-02-4

5-methyl-thiophene-2-carbaldehyde semicarbazone

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

hexa-2,4-diene
592-46-1

hexa-2,4-diene

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

Conditions
ConditionsYield
With sulfur at 420℃;
acetylene
74-86-2

acetylene

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

Conditions
ConditionsYield
at 650 - 670℃; beim Durchleiten mit Leuchtgas und Schwefelwasserstoff durch Roehren aus Marquardtscher Masse;
2-hexene
592-43-8

2-hexene

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

Conditions
ConditionsYield
With sulfur at 420℃;
2-Methylthiophene
554-14-3

2-Methylthiophene

Methyl fluoride
593-53-3

Methyl fluoride

A

2,3-dimethylthiophene
632-16-6

2,3-dimethylthiophene

B

2,4-dimethylthiophene
638-00-6

2,4-dimethylthiophene

C

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

Conditions
ConditionsYield
With oxygen; trimethylamine In gas at 37.5℃; Product distribution; Kinetics; Mechanism; radiolysis: 1.5*104 Gy at 5*105 Gy h-1; variable pressures;
2-Methylthiophene
554-14-3

2-Methylthiophene

A

thiophene
188290-36-0

thiophene

B

2,3-dimethylthiophene
632-16-6

2,3-dimethylthiophene

C

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

D

toluene
108-88-3

toluene

Conditions
ConditionsYield
1.) glow discharge, 2.) -196 deg C -> -80 deg C; Further byproducts given. Title compound not separated from byproducts;A 15.3 % Chromat.
B 1.8 % Chromat.
C 4.9 % Chromat.
D 1.2 % Chromat.
2-Methylthiophene
554-14-3

2-Methylthiophene

A

thiophene
188290-36-0

thiophene

B

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

C

toluene
108-88-3

toluene

D

benzene
71-43-2

benzene

Conditions
ConditionsYield
1.) glow discharge, 2.) -196 deg C -> -80 deg C; Further byproducts given. Title compound not separated from byproducts;A 15.3 % Chromat.
B 4.9 % Chromat.
C 1.2 % Chromat.
D 8.6 % Chromat.
2-Methylthiophene
554-14-3

2-Methylthiophene

A

2-ethylthiophene
872-55-9

2-ethylthiophene

B

2,4-dimethylthiophene
638-00-6

2,4-dimethylthiophene

C

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

D

3-Methylthiophene
616-44-4

3-Methylthiophene

Conditions
ConditionsYield
1.) glow discharge, 2.) -196 deg C -> -80 deg C; Further byproducts given. Title compound not separated from byproducts;A 11.7 % Chromat.
B 0.6 % Chromat.
C 4.9 % Chromat.
D 9.2 % Chromat.
2,3-dimethylthiophene
632-16-6

2,3-dimethylthiophene

A

thiophene
188290-36-0

thiophene

B

2-ethylthiophene
872-55-9

2-ethylthiophene

C

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

D

3-Methylthiophene
616-44-4

3-Methylthiophene

Conditions
ConditionsYield
1.) glow discharge, 2.) -196 deg C -> -80 deg C; Further byproducts given. Title compound not separated from byproducts;A 3.1 % Chromat.
B 1.5 % Chromat.
C 1.0 % Chromat.
D 12.8 % Chromat.
3,4-dimethylthiophene
632-15-5

3,4-dimethylthiophene

A

2,3-dimethylthiophene
632-16-6

2,3-dimethylthiophene

B

2,4-dimethylthiophene
638-00-6

2,4-dimethylthiophene

C

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

D

3-Methylthiophene
616-44-4

3-Methylthiophene

Conditions
ConditionsYield
1.) glow discharge, 2.) -196 deg C -> -80 deg C; Further byproducts given. Title compound not separated from byproducts;A 5.1 % Chromat.
B 6.2 % Chromat.
C 1.1 % Chromat.
D 12.2 % Chromat.
3,4-dimethylthiophene
632-15-5

3,4-dimethylthiophene

A

2,4-dimethylthiophene
638-00-6

2,4-dimethylthiophene

B

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

C

3-Methylthiophene
616-44-4

3-Methylthiophene

D

benzene
71-43-2

benzene

Conditions
ConditionsYield
1.) glow discharge, 2.) -196 deg C -> -80 deg C; Further byproducts given. Title compound not separated from byproducts;A 6.2 % Chromat.
B 1.1 % Chromat.
C 12.2 % Chromat.
D 17.6 % Chromat.
2,4-dimethylthiophene
638-00-6

2,4-dimethylthiophene

A

2,3-dimethylthiophene
632-16-6

2,3-dimethylthiophene

B

3,4-dimethylthiophene
632-15-5

3,4-dimethylthiophene

C

2-ethylthiophene
872-55-9

2-ethylthiophene

D

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

Conditions
ConditionsYield
1.) glow discharge, 2.) -196 deg C -> -80 deg C; Further byproducts given. Title compound not separated from byproducts;A 0.6 % Chromat.
B 2.9 % Chromat.
C 1.2 % Chromat.
D 3.5 % Chromat.
2,4-dimethylthiophene
638-00-6

2,4-dimethylthiophene

A

2-Methylthiophene
554-14-3

2-Methylthiophene

B

3,4-dimethylthiophene
632-15-5

3,4-dimethylthiophene

C

2,5-DIMETHYLTHIOPHENE
638-02-8

2,5-DIMETHYLTHIOPHENE

D

3-Methylthiophene
616-44-4

3-Methylthiophene

Conditions
ConditionsYield
1.) glow discharge, 2.) -196 deg C -> -80 deg C; Further byproducts given. Title compound not separated from byproducts;A 6.6 % Chromat.
B 2.9 % Chromat.
C 3.5 % Chromat.
D 9.5 % Chromat.

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