Formalin is used

Options

A. for the preservation of biological specimans
B. asa a disinfectant
C. as a germicide
D. All of the above

Answer

**Step-by-Step Text Solution:**

1. **Understanding Formalin**: Formalin is a solution that contains formaldehyde, specifically a 40% solution of formaldehyde (HCHO) in water.

2. **Composition of Formalin**: The chemical formula for formaldehyde is HCHO. When we refer to formalin, we are talking about this concentrated solution of formaldehyde.

3. **Uses of Formalin**:
- **Preservation**: One of the primary uses of formalin is for the preservation of biological specimens. It helps in preventing decay and decomposition of organic materials.
- **Disinfectant**: Formalin acts as a disinfectant, meaning it can kill bacteria and other pathogens, making it useful in laboratory settings.
- **Germicide**: Due to its ability to kill germs, formalin is also classified as a germicide.

4. **Conclusion**: Therefore, formalin is widely used in laboratories for the preservation of specimens, as a disinfectant, and as a germicide.

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