Methylene diphenyl diisocyanate, often abbreviated as MDI, is known as an aromatic diisocyanate.

Toluene, benzene, or hexane are suitable organic solvents for determining the density of diphenyl.

Dichloro Diphenyl Trichloroethane

Reagents Needed:

diphenyl carbazide

conc. HCl

ethanol

Method:

1. Dissolve 0.5g of diphenyl carbazide in 5mL of conc HCl.

2. Prepare a solution of 50%(v/v) ethanol by mixing 50mL 95%(v/v) ethanol and water.

3. Transfer the diphenyl carbazide solution in HCl to the 50% ethanol and mix.

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