List the physical properties of plastic sulphur.

Explanation

To answer the question about the physical properties of plastic sulfur, we will list the key characteristics based on the information provided.

### Step-by-Step Solution:

1. **Appearance**: Plastic sulfur appears as a dark brown, rubber-like mass. This property gives us an idea of its visual characteristics and texture.

2. **Density**: The density of plastic sulfur is 1.92 grams per milliliter (g/ml). This property indicates how much mass is contained in a given volume of the substance.

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