What is barbituric acid used for?

Barbiturates are derivatives of barbituric acid. They can be used as hypnotics, sedatives, anticonvulsants and anesthetics, although they are probably most familiar as ‘sleeping pills’. The different properties of the various barbiturates depend upon the sidegroups attached to the ring.

Is barbituric acid a controlled substance?

Barbituric acid derivatives are considered DEA Schedule III controlled substances.

What are barbiturates commonly known as?

Barbiturates are available under the following different brand names: amobarbital (Amytal), secobarbital (Seconal), butabarbital (Butisol), pentobarbital (Nembutal), belladonna and phenobarbital (Donnatal), butalbital/acetaminophen/caffeine (Esgic, Fioricet), and butalbital/aspirin/caffeine (Fiorinal Ascomp, Fortabs).

Is barbituric acid a strong acid?

Barbiturates are administered orally or parenterally. As weak acids, they are absorbed rapidly from the stomach and small intestine into the systemic circulation.

Is barbituric acid a tranquilizer?

They are psychotherapeutic drugs. The most commonly used tranquilizers are barbituric acid and its 5, 5-disubstituted derivatives such as veronal, luminal and seconal.

Where does barbituric acid come from?

Background. Barbituric acid, the precursor of barbiturates, was first produced in 1864 by condensation of malonic acid and urea; it had no central nervous system (CNS) effects. In 1903, diethyl barbituric acid (barbital) was created as the first barbiturate with CNS inhibitory effects.

What is the PH of barbituric acid?

In contrast to barbituric acid, which is five times more acidic (pKa 4.0) than acetic acid (pKa 4.75), the 5,5-disubstituted derivatives are only weak acids (pKa about 8). This is of importance for their biological effects and for their analytical behavior.

What is barbituric acid made of?

Barbituric acid or malonylurea or 6-hydroxyuracil is an organic compound based on a pyrimidine heterocyclic skeleton. It is an odorless powder soluble in water. Barbituric acid is the parent compound of barbiturate drugs, although barbituric acid itself is not pharmacologically active.

What are barbiturates?

Barbiturates are CNS depressants that are used clinically as sedative hypnotic drugs. Barbituric acid, a pharmacologically inactive compound, was synthesized in 1864 while in the early 1900s barbital, the first barbituric acid derivative with pharmacological activity, was discovered.

What is the pKa of barbituric acid?

Structures of typical barbiturates. In contrast to barbituric acid, which is five times more acidic (pKa 4.0) than acetic acid (pKa 4.75), the 5,5-disubstituted derivatives are only weak acids (pKa about 8). This is of importance for their biological effects and for their analytical behavior.

What is the difference between barbituric acid and 5-5-disubstituted analogs?

This is of importance for their biological effects and for their analytical behavior. Under physiological conditions, barbituric acid is deprotonated, while 5,5-disubstituted analogues are mainly unionized and can cross the blood-brain barrier.