3-(2-Thienyl)benzaldehyde with cas registry number of 103668-99-1 is a kind of API intermediates. It is also called 3-Thien-2-ylbenzaldehyde with its IUPAC name of 3-Thiophen-2-ylbenzaldehyde .

  3-(2-Thienyl)benzaldehyde is often used in laboratory. But it irritates to our eyes, respiratory system and skin. When you use this chemical, wear suitable gloves and eye/face protection and suitable protective clothing. If contact with eyes inadvertently, do not panic. Rinse immediately with plenty of water and seek medical advice. Besides this,  3-(2-Thienyl)benzaldehyde is also harmful by inhalation and if swallowed. So avoid to breathe dust.