PR is a colorimetric reagent and indicator for heavy metal ions and rare earth metals. This reagent is hardly soluble in water and alcohol, and insoluble in organic solvents. The color of PR in aqueous solution is orange-red in weak acidic pH, yellow in neutral pH, and violet in alkaline pH.
Molekulargewicht:
400.36
CAS Nummer:
[32638-88-3]
Formel:
C19H12O8S
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