These are very similar products. HARD1000 was developed based on EPA sampling requirements at the time of the initial design. THRD1000, on the other hand, was created at a later time and was classified based on chemistry and stability.
HARD1000
Hardness, Calcium 1000 mg/L Calibration Standard
certified reference material
Synonym(s):
Calcium Hardness Standard
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About This Item
Recommended Products
grade
certified reference material
CofA
current certificate can be downloaded
manufacturer/tradename
RTC HARD1000-100
concentration
in H2O
application(s)
environmental
format
single component solution
storage temp.
2-8°C
General description
Other Notes
Storage Class Code
10 - Combustible liquids
WGK
nwg
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
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What are the different purposes for the two standards, HARD1000 – LRAC5534 and THRD1000 – LRAC8406, especially for performing hardness by titration at a concentration of 50 mg/L? There is confusion regarding the different names and the Raw Material Lot numbers that seem to be related to the MKBN6366V lot number.
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