Hardness
- CAS No.
- Chemical Name:
- Hardness
- Synonyms
- Hardness
- CBNumber:
- CB11449432
- Molecular Formula:
- Molecular Weight:
- 0
- MDL Number:
- MOL File:
- Mol file
Hardness Chemical Properties,Uses,Production
Agricultural Uses
The resistance of a pesticide or detergent to decomposition or biodegradation is known as hardness or persistence.
Hardness also means the proportion of calcium carbonate or calcium sulphate contained in a given sample of water. Based on the presence of calcium and magnesium salts, water can either have temporary hardness or permanent hardness.
Hardness is also the resistance of a material to deformation of an indenter of specific size and shape under a known load. The definition applies to all types of hardness scales, except the Mohs-scale which is based on the concept of scratch hardness and used chiefly for minerals.
The most generally used hardness scales are Brine11 (for cast iron), Rockwell (for sheet metals and heat treated steel, diamond, pyramid, hoop) and scleroscope (for metals). Durometer hardness is used for softer materials like rubber and plastic.
Extremely shortwave radiation is also known as hardness. For example, hard-x-rays.