Parameter  Product

Index

Unit

Reagent A.C.S

HPLC Grade

U.S.P

(Progeny Free)

Technical Pure Grade

Assay

≥%

97

97

98

98

PH of 5% solution 25

6.7 7.3

6.7 7.3

6.7 7.3

6.7 7.3

Insoluble Matter

≤%

0.005

0.005

0.005

Residue after Ignition

≤%

0.01

0.01

0.01

Chloride (Cl)

≤ppm

5

5

5

50

Nitrate (NO3)

≤%

0.001

0.001

Sulfate (SO4)

≤%

0.001

0.001

0.005

Heavy Metal (as Pb)

≤ppm

5

5

10

5

Iron (Fe)

≤ppm

5

5

10

10