Indole
1.91 g (16.3 mmol)
Dimethylamine aq.sol. 40%
2.11 mL (16.6 mmol)
Formaldehyde aq.sol.37%
1.24 mL (16.6 mmol)
Acetic acid
0.95 mL
Sodium hydroxide
50 mL
Petroleum ether
40 mL
Acetone
10 mL
WHAT IS SODIUM HYDROXIDE FOR?
TO FORM THE FIRST CRYSTAL