Chloride
Chloride is a major electrolyte that helps maintain acid-base balance, fluid balance, and gastric acid production. It usually moves with sodium, but disproportional changes give clues to acid-base disorders.
Normal Range
98–107 mmol/L
Reference ranges may vary slightly between laboratories. Always interpret your result in context with your doctor.
Why is Cl- measured?
Chloride is part of the basic metabolic panel. It helps assess acid-base disorders alongside bicarbonate and the anion gap.
High Cl- means…
High chloride suggests dehydration, metabolic acidosis (especially with normal anion gap), or specific medication effects.
Low Cl- means…
Low chloride suggests fluid retention, prolonged vomiting (loss of stomach acid), respiratory alkalosis, or certain medications.
Symptoms associated with abnormal Cl-
When Cl- is high:
- Symptoms of dehydration or underlying acidosis
When Cl- is low:
- Symptoms of underlying alkalosis or fluid overload
How to improve your Cl-
- Always interpret with sodium and bicarbonate.
- Anion gap = sodium − (chloride + bicarbonate); abnormal gap reveals acid-base disorders.
Frequently asked questions about Cl-
Is chloride clinically important on its own?
Rarely. Chloride is most useful when interpreted with sodium and bicarbonate to evaluate acid-base balance and the anion gap.
Medical Sources
This page is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider about your individual results.