TEST OF ETHANOL

2ml of Ethanol

Combustion Test Reagents

Blue Flame

Result of Combustion Test

2ml Ethanol
2ml HCl
2ml ZnCl2

Lucas Test Reagents

No turbidity or very slow formation of cloudiness.

Result of Lucas Test

10ml USP Alcohol
0.25g Resorcinol
2ml conc. H2SO4

Step 4 Reagents (Resorcinol Test – Without Methanol)

A yellow-brown ring forms at the junction.

Step 4 Result (Resorcinol Test – Without Methanol)

4 mL USP Alcohol
2 mL Methanol
0.25 g Resorcinol

Step 4 Reagents (Resorcinol Test – With Methanol)

Reddish Brown Color Develops

Result of Step 4 Reagents (Resorcinol Test – With Methanol)

3 mL conc. H₂SO₄ is slowly added to the test tube from No. 5, without shaking.

Sulfuric Acid Reaction (Before Shaking – No. 5 Test Tube)

Green or mass green color appears at the junction of two liquids.

Expected Result

Shake the test tube carefully.

Sulfuric Acid Reaction (After Shaking – No. 6 Test Tube)

Brown color forms after mixing.

Result of Sulfuric Acid Reaction (After Shaking – No. 6 Test Tube)

5 mL USP Alcohol
5 mL Resorcinol
15 drops of p-dimethylaminobenzaldehyde
H₂SO₄.

p-Dimethylaminobenzaldehyde Test

Golden yellow ring appears after 5 minutes.

Result of p-Dimethylaminobenzaldehyde Test