Write method of preparation of urotropine and give its use.

Explanation

### Step-by-Step Solution for the Preparation of Urotropine

**Step 1: Understanding Urotropine**
- Urotropine, also known as Hexamethylenetetramine, is a chemical compound with the formula \( C_6H_{12}N_4 \). It is formed through the reaction of formaldehyde and ammonia.

**Step 2: Reactants Required**
- The primary reactants needed for the preparation of Urotropine are:
- Formaldehyde (\( CH_2O \))
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