Citric Acid
Citric acid is a naturally occurring weak acid. In its concentrated form, it has a pH between 2.2 and 2.5. When diluted in water, the pH rises slightly — depending on the strength of the solution — usually settling around pH 3 to 4.
It’s a safe, biodegradable option for descaling, removing soap scum, and cutting through mineral build-up. Because it's a weak acid, it’s effective without being overly harsh — a great option for bathrooms, kettles, and anywhere limescale builds up.
