Chlorophosphonazo III

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Chlorophosphonazo III is a sensitive reagent for both calcium and magnesium. It is possible to determine calcium alone at pH 2.2 and calcium and magnesium at pH 7.0. Chlorophosphonazo III can also be used for the spectrophotometric determination of titanium, zirconium, thorium, and scandium, quinquevalent actinide elements, and protactinium.

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Chlorophosphonazo III Chemical Structure

CAS No. : 1914-99-4

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Description	Chlorophosphonazo III is a sensitive reagent for both calcium and magnesium. It is possible to determine calcium alone at pH 2.2 and calcium and magnesium at pH 7.0. Chlorophosphonazo III can also be used for the spectrophotometric determination of titanium, zirconium, thorium, and scandium, quinquevalent actinide elements, and protactinium^[1].
Molecular Weight	757.36
Formula	C₂₂H₁₆Cl₂N₄O₁₄P₂S₂
CAS No.	1914-99-4
Appearance	Solid
Color	White to off-white
SMILES	O=P(O)(C1=CC(Cl)=CC=C1/N=N/C2=C(C3=C(C=C2S(=O)(O)=O)C=C(S(=O)(O)=O)C(/N=N/C4=CC=C(C=C4P(O)(O)=O)Cl)=C3O)O)O
Shipping	Room temperature in continental US; may vary elsewhere.
Storage	Please store the product under the recommended conditions in the Certificate of Analysis.
Purity & Documentation	Data Sheet (269 KB) Handling Instructions (2659 KB)
References	[1]. Ferguson J W, et al. Simultaneous spectrophotometric determination of calcium and magnesium with chlorophosphonazo III. Analytical Chemistry, 1964, 36(4): 796-799.