PH indicator range: 4.5(red)~6.2(yellow)
Residue on ignition (as sulfate): 0.2%max
Mass-absorption coefficient λ1(PH4.5),L/(cm·g): 130min
λ2(PH6.2),L/(cm·g): 70min
Maximum absorption wavelength λ1(PH4.5),nm: 523~528
λ2(PH6.2),nm: 427~437
Loss on drying: 1.0%max
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