ISPE Glossary of Pharmaceutical and Biotechnology Terminology

Print this page         
Find Definition by Term and/or Language
Term Language (Optional)
Browse All Terms
Beginning With By Language
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z :: All English

Hardness (water)

The concentration of calcium and magnesium salts in water. Hardness is a term originally referred to the soap-consuming power of water; as such it is sometimes also taken to include iron and manganese. “Permanent hardness” is the excess of hardness over alkalinity. “Temporary hardness” is equal or less than the alkalinity. These also are referred to as “non-carbonated” or “carbonate” hardness, respectively.

Publication Source: ISPE Baseline® Guide, Vol. 4: Water and Steam Systems (Second Edition)

Publication Date: 2011

Do you have a term that should be included in the glossary?
Submit a term for review


  • Click to go to My Communities of Practice
  • Click to go to My Affiliate or Chapter
  • Click to go to My Profile
Click to go to the Member Gift