menadione
Noun: A synthetic compound, chemically known as 2-methyl-1,4-naphthoquinone, which exhibits biological activity similar to that of vitamin K. It is used medically as a source of vitamin K activity, particularly in treating or preventing certain bleeding disorders related to vitamin K deficiency.
Menadione is primarily used in medical and nutritional contexts. It is a specific form of vitamin K, often distinguished from the natural forms (phylloquinone and menaquinones) found in foods.
- The veterinarian prescribed menadione to treat the animal's clotting disorder.
- Some nutritional supplements for poultry are fortified with menadione.
- Menadione sodium bisulfite is a common water-soluble derivative used in injections.
- Biochemical Role: In the body, menadione is converted into an active form of vitamin K, which is essential for the synthesis of several blood clotting factors.
- Historical Context: Menadione was one of the first synthetic forms of vitamin K to be discovered and utilized, leading to its designation as vitamin K₃.
- Menadione sodium bisulfite (n): A water-soluble salt form of menadione used in medical applications.
- Vitamin K₃ (n): An alternative name for menadione, distinguishing it from vitamin K₁ (phylloquinone) and K₂ (menaquinones).
- Vitamin K₃: The most direct synonym, used interchangeably in scientific and medical literature.
- 2-methyl-1,4-naphthoquinone: The precise chemical name.
While "menadione" is a form of vitamin K, it is crucial to note that in some contexts, especially concerning high-dose toxicity in infants, the term "vitamin K" alone typically refers to the safer, natural forms (K₁ or K₂), not synthetic menadione. Therefore, "menadione" specifies this particular synthetic compound.
- a form of vitamin K