What can be used in place of RegenVer Hardness reagent (catalog number 21053 and 21032H) that has been discontinued?

Document ID

Document ID TE301

Version

Version 2.0

Status

Status Published

Published Date

Published Date 27/05/2017
Question
What can be used in place of RegenVer Hardness reagent (catalog number 21053 and 21032H) that has been discontinued?
Summary
Replacement for RegenVer Hardness reagent catalog number 21053 and 21032H
Answer
The RegeneVer Hardness Reagent (catalog number 21053 and 21032H) included a buffer, indicator, and titrant all in one solution. When added to a sample, a red color would form if the sample contained more than 1 gpg hardness (as CaCO3). If red, more RegeneVer was added until the sample turned blue. Each drop was equivalent to 1 gpg hardness. This reagent was discontinued in January 2004.

Other hardness reagents and test kits are available that can be used in place of RegeneVer. The 5-B and 5-EP test kits (catalog number 145300 and 145400) use UniVer®3 reagent and a titrant solution. If the sample turns blue after adding UniVer®3, the water is soft. If the sample turns red, add drops of the titrant until the sample turns blue to find the hardness concentration.