Riboflavin (Ph. Eur., USP) pure, pharma grade

Riboflavin (Ph. Eur., USP) pure, pharma grade
Content: 100 GRM
Physical Description:
Solid
Specification: Assay (UV, dried subst.): 98.0 - 102.0 %
a20°C/D; 0.5 %, 0.05 N NaOH, dried subst.: -115° - -135°
Identity: passes test
Loss on drying:?max. 1.5 %
Sulfated ash:?max. 0.1 %
A373 nm / A267 nm: 0.31 - 0.33
A444 nm / A267 nm: 0.36 - 0.39
Absorption?maxima (223, 267, 373, 444 nm): passes test
Impurity A (HPLC):?max. 0.025 %
Impurity B (HPLC):?max. 0.20 %
Impurity C (HPLC):?max. 0.20 %
Impurity D (HPLC):?max. 0.20 %
Related substances impurities (total) (HPLC):?max. 0.5 %
Largest unspecified impurity (HPLC):?max. 0.10 %
Lumiflavin (UV): passes test