A substance which can act both as an antiseptic and disinfectant is

Options

A. aspirin
B. chloroxylenol
C. bithional
D. phenol

Explanation

To solve the question of identifying a substance that can act both as an antiseptic and disinfectant, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Antiseptic**: A substance that prevents the growth of disease-causing microorganisms. It is usually safe for use on living tissues.
- **Disinfectant**: A substance that kills or inhibits the growth of microorganisms on inanimate objects. It is usually harsher and not safe for living tissues.

2. **Analyze the Options**:
- **Aspirin**: This is primarily a painkiller and antipyretic (fever reducer). It does not have antiseptic or disinfectant properties.
- **Chlorozymalol**: This is an antiseptic found in products like Dettol. However, it does not function as a disinfectant.
- **Butanol**: This is an alcohol used as a solvent and does not have significant antiseptic or disinfectant properties.
- **Phenol**: This compound is known to have both antiseptic and disinfectant properties.

3. **Examine Phenol**:
- At a concentration of **0.2%**, phenol acts as an antiseptic, suitable for application on living tissues.
- At a concentration of **1%**, it acts as a disinfectant, effective for cleaning surfaces and killing bacteria.

4. **Conclusion**:
- Based on the analysis, the only substance that can act both as an antiseptic and disinfectant is **Phenol**.

### Final Answer:
The substance which can act both as an antiseptic and disinfectant is **Phenol**.

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