1-Ethyl-1H-benzimidazole-2-sulfonic acid(CAS: 90331-19-4)

1-Ethyl-1H-benzimidazole-2-sulfonic acid (CAS: 90331-19-4) is a crystalline solid with a molecular weight of approximately 220.24 g/mol. It is slightly soluble in water but soluble in organic solvents like ethanol. The compound is stable under normal conditions but may react with strong bases and acids. It is commonly used in pharmaceuticals and sensors due to its chemical stability and functional groups.

1-Ethyl-1H-benzimidazole-2-sulfonic acid is typically synthesized by the reaction of 1-ethylbenzimidazole with sulfur trioxide (SO3) in a suitable solvent. The reaction involves the generation of the corresponding sulfonic acid derivative. Common solvents include acetonitrile or methanol. The yield is generally high, and the reaction is performed under mild conditions to ensure selectivity and avoid over-acidification.

1-Ethyl-1H-benzimidazole-2-sulfonic acid (CAS: 90331-19-4) is primarily used in the pharmaceutical industry for the synthesis of various drugs and in the sensor industry for developing pH sensors and other electrochemical sensors. It is also utilized in the polymer industry for certain types of functional polymers.

When handling 1-Ethyl-1H-benzimidazole-2-sulfonic acid (CAS: 90331-19-4), it is essential to use personal protective equipment (PPE) such as gloves, goggles, and a lab coat. The compound should be handled in a well-ventilated area or a fume hood to avoid inhalation of any vapor. In case of a spill, neutralize the acid with a base and collect the waste according to local regulations. Always refer to the Safety Data Sheet (SDS) for detailed handling and disposal information.