What is Chloride?
your acid-base balance
Chloride often tracks sodium and helps maintain acid-base balance and fluid status.
The value is read alongside sodium and bicarbonate when assessing acid-base disturbances.
Test facts
- Unit
- mmol/L
- Sample
- Serum
- Fasting
- No fasting needed
- Turnaround
- 1 day
What does low Chloride mean?
Low chloride can appear with vomiting or alkalosis.
What does high Chloride mean?
High chloride can appear with dehydration or acidosis.
More markers in the same area
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This is general information about the marker, not an assessment of your values and not medical advice. Last updated: May 2026.