A 45-year-old male presents to the emergency department with chemical burns to his hands and forearms. He reports that he was cleaning with a strong cleaner but is unsure of the exact substance. On inspection, his burns display coagulation necrosis with a dry, leathery appearance. Which type of agent is most likely responsible for this injury?
Sodium hydroxide
Ethanol
Hydrochloric acid
Bleach (sodium hypochlorite)