3-Methyl-2-thiophenecarboxylic acid

What is 3-Methyl-2-thiophenecarboxylic acid?

white to light yellow crystal powder

The Journal of Organic Chemistry, 28, p. 914, 1963 DOI: 10.1021/jo01039a008
Tetrahedron Letters, 26, p. 1777, 1985 DOI: 10.1016/S0040-4039(00)98336-9

3-Methyl-2-thiophenecarboxylic acid has been used in the synthesis of zinc and cadmium carboxylate complexes.

Melting point:	147-149 °C(lit.)
Boiling point:	229.75°C (rough estimate)
Density	1.365 (estimate)
refractive index	1.5300 (estimate)
storage temp.	2-8°C(protect from light)
form	solid
pka	3.68±0.10(Predicted)
color	White to Light yellow to Light orange
BRN	116184
CAS DataBase Reference	23806-24-8(CAS DataBase Reference)
NIST Chemistry Reference	3-Methyl-2-thiophenecarboxylic acid(23806-24-8)

Signal word	Warning
Pictogram(s)	Exclamation Mark Irritant GHS07
GHS Hazard Statements	H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation
Precautionary Statement Codes	P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P304+P340:IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P405:Store locked up.