1,4-Benzoquinone dioxime CAS-No.  105-11-3

SYNONYMS: p-Benzoquinone dioxime;

p-Quinone dioxime;  PQD;  QDO

DESCRIPTION: Moist solid containing approx. 30% water

Greenish yellow or umber powder (Anhydrous basis)

Assay (C6H6N2O2 Anhydrous basis, HPLC) min94%

M. P.       240~243 C (Dec. Dried substance)

Nitrosophenol cont.  max 6 % (Dried substance)

Water cont.        Approx. 30%

5-Amino-2,4,6-triiodoisophthalic acid CAS-No.  89-40-7

SYNONYMS: 5-Amino-2,4,6-triiodobenzene-1,3-dioic acid; 5-Atipa

DESCRIPTION: Slightly brown or slightly yellow powder

Assay (based on dry substance)             66.8~68.8 %                         

Melting Point                265~270 C

Free iodine                       max 0.01%            

Free iodide                        max 0.1%            

Water (K. F. titration)             max 1.0%

Purity (HPLC, area)             min 98.5 %

Any other individual impurity [HPLC]  max 0.5 % area

Total sum of impurities [HPLC]          max 1.5 % area

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