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5-Methyl-2-thiophenecarboxylic acid Structure

5-Methyl-2-thiophenecarboxylic acid

Chemical Properties

Melting point 135-138 °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)
pka 3.71±0.10(Predicted)
form  Liquid
color  Clear
BRN  113857
CAS DataBase Reference 1918-79-2(CAS DataBase Reference)
FDA UNII 5SX6CX4FJB
NIST Chemistry Reference 5-Methyl-2-thiophenecarboxylic acid (keto form)(1918-79-2)

Safety

Symbol(GHS) GHS hazard pictograms
Signal wordWarning
Hazard statements H315-H319-H335
Precautionary statements P261-P280a-P304+P340-P305+P351+P338-P405-P501a
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  22-24/25
WGK Germany  3
HazardClass  IRRITANT
HS Code  29309090
NFPA 704:
1
2 0

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