14282-78-1

14282-78-1 - Names and Identifiers

Name	4-methylthiophene-2-carboxylic acid
Synonyms	ASINEX-REAG BAS 07664671 2-Carboxy-4-methylthiophene 4-methylthiophen-2-carboxlic acid 4-METHYLTHIOPHENE-2-CARBOXYLIC ACID 4-Methyl-2-thiophenecarboxylic acid 4-methylthiophene-2-carboxylic acid 2-Carboxy-4-methylthiophene, 4-Methyl-2-thenoic acid
CAS	14282-78-1
InChI	InChI=1/C6H6O2S/c1-4-2-5(6(7)8)9-3-4/h2-3H,1H3,(H,7,8)

14282-78-1 - Physico-chemical Properties

Molecular Formula	C6H6O2S
Molar Mass	142.18
Density	1.319±0.06 g/cm3(Predicted)
Melting Point	122-126°C(lit.)
Boling Point	158 °C(Press: 16 Torr)
Flash Point	121.5°C
Vapor Presure	0.0022mmHg at 25°C
pKa	3.76±0.10(Predicted)
Storage Condition	Keep in dark place,Sealed in dry,Room Temperature
Refractive Index	1.59

14282-78-1 - Risk and Safety

Hazard Symbols	Xi - Irritant
Risk Codes	R36 - Irritating to the eyes R43 - May cause sensitization by skin contact
Safety Description	S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection
WGK Germany	3
HS Code	29349990
Hazard Class	IRRITANT

14282-78-1 - Introduction

4-Methyl-2-thiophenecarboxylic acid is an organic compound with the chemical formula C7H6OS. The following is a detailed description of its nature, use, preparation and safety information:

Nature:
4-Methyl -2-thiophene carboxylic acid is a colorless to yellow solid with a special thiol odor. It has a melting point of 53-57 degrees Celsius and a boiling point of 170 degrees Celsius. At room temperature, it can be dissolved in many organic solvents, such as ethers, ketones and alcohols.

Use:
4-Methyl-2-thiophenecarboxylic acid is widely used in organic synthesis. It can be used as an intermediate for the synthesis of other organic compounds, such as dyes, pesticides and pharmaceuticals. In addition, it can also be used as an important synthetic raw material for highly efficient glyphosate (a herbicide).

Preparation Method:
4-methyl -2-thiophenecarboxylic acid is generally obtained by reacting and oxidizing 4-methyl -2-thiophenethiol with oxygen. First, mercaptans can be synthesized from hydrogen sulfide and ethylene. Then, the resulting thiol is dissolved in an organic solvent and subjected to an oxidation reaction to finally obtain a product of 4-methyl-2-thiophenecarboxylic acid.

Safety Information:
When using and operating 4-methyl -2-thiophene carboxylic acid, the following safety precautions need to be paid attention:
- 4-methyl -2-thiophene carboxylic acid should be kept away from fire and high temperature.
-During operation, avoid inhaling its dust or vapor, and wear appropriate protective gloves and glasses.
-If you come into contact with skin or eyes, rinse immediately with plenty of water and seek medical help.
-Waste should be disposed of in accordance with local regulations to avoid release into the environment.

Last Update：2024-04-09 21:01:54