3-Chlorobenzo[b]thiophene-2-carboxylic acid , 98% , 21211-22-3

CAS NO.：21211-22-3

Empirical Formula: C9H5ClO2S

Molecular Weight: 212.65

MDL number: MFCD00014579

EINECS: 626-897-4

PRODUCT Properties

• Melting point: 268-272 °C(lit.)
• Boiling point: 395.1±22.0 °C(Predicted)
• Density: 1.546±0.06 g/cm3(Predicted)
• storage temp.: Keep in dark place,Sealed in dry,Room Temperature
• form: powder to crystal
• pka: 2.27±0.30(Predicted)
• color: White to Light yellow
• BRN: 1425602
• CAS DataBase Reference: 21211-22-3(CAS DataBase Reference)

Description and Uses

3-Chloro-benzo[b]thiophene-2-carboxylic acid may be used in the synthesis of the following:

• 5-(3-chlorobenzo[b]thiophen-2-yl)-1,3,4-thiadiazol-2-ylamine via condensation with thiosemicarbazide in the presence of POCl₃
• 2-benzo[b]thiophen-2-yl-6-methylbenzo[d][1;3]oxazi-4-one via reaction with 2-amino-5-methyl-benzoic acid in the presence of carbonyl diimidazole

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H302
• Precautionary statements: P264-P270-P301+P312-P501
• Hazard Codes: Xn,Xi
• Risk Statements: 22
• Safety Statements: 26-36
• WGK Germany: 3
• HazardClass: IRRITANT
• HS Code: 29349990