HCL

HCL may refer to:

Science and medicine

Organizations

See also

Hypomania Checklist

The Hypomania Checklist (HCL-32) is a questionnaire developed by Dr. Jules Angst to identify hypomanic components in patients with major depressive disorder in order to help clinicians diagnose bipolar II disorder and other bipolar spectrum disorders presented in psychiatric and general medical practice. The development of a final and potentially shorter multi-lingual version with established cut-off scores for hypomania is a secondary goal.

Development and history

The HCL-32 was developed as a more useful method to test hypomania and essentially aid in epidemiological research. The test itself was made a self-assessment screening internment.

The Hypomania Checklist was developed because attempts to screen for bipolar focused on the identifying individuals at risk for developing mood disorders in non-clinical populations. The measures were specifically for personality and did not address the episodic nature of hypomania and potential negative consequences of any changes in behavior, affect and cognition.

Hydrogen chloride

The compound hydrogen chloride has the chemical formula HCl. At room temperature, it is a colorless gas, which forms white fumes of hydrochloric acid upon contact with atmospheric humidity. Hydrogen chloride gas and hydrochloric acid are important in technology and industry. Hydrochloric acid, the aqueous solution of hydrogen chloride, is also commonly given the formula HCl.

Chemistry

Hydrogen chloride is a diatomic molecule, consisting of a hydrogen atom H and a chlorine atom Cl connected by a covalent single bond. Since the chlorine atom is much more electronegative than the hydrogen atom, the covalent bond between the two atoms is quite polar. Consequently, the molecule has a large dipole moment with a negative partial charge δ⁻ at the chlorine atom and a positive partial charge δ⁺ at the hydrogen atom. In part because of its high polarity, HCl is very soluble in water (and in other polar solvents).

Upon contact, H₂O and HCl combine to form hydronium cations H₃O⁺ and chloride anions Cl⁻ through a reversible chemical reaction: