A post-mortem examination reveals gastric mucosa with a soap-like, whitish, firm consistency and a characteristic sweetish smell. The stomach contents leave a gritty sensation on touch. Which corrosive acid is most likely responsible?
- A Carbolic acid (Phenol) ✓
- B Sulphuric acid (Oil of vitriol)
- C Hydrochloric acid
- D Nitric acid
Correct answer: A. Carbolic acid (Phenol)
Explanation
Carbolic acid (phenol) causes coagulative necrosis that converts proteins into a firm, white, soap-like eschar due to its protein precipitating action. The characteristic sweetish smell (phenolic odour) and the firm texture distinguish it from mineral acids. Sulphuric acid causes charring (black eschar) and brown discolouration; hydrochloric acid produces a grayish-white leathery eschar; nitric acid causes yellow xanthoprotein staining (xanthoproteic reaction).
Reference: The Essentials of Forensic Medicine and Toxicology (Narayan Reddy), 34th ed.
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Written and medically reviewed by the StethoPrep medical team.