Reagents

Specifications

Assay % 99.5 - 102.0 pH (5% aq solution) 7.5 - 9.0 Insoluble matter % Max 0.005 Chloride (Cl) % Max 0.001 Nitrogen compounds (N) % Max 0.001 Sulfate (SO4) % Max 0.001 Barium & strontium (as Ba) % Max 0.001 Calcium (Ca) % Max 0.001 Copper (Cu) % Max 0.0002 Iron (Fe) % Max 0.0001 Lead (Pb) % Max 0.0005 Manganese (Mn) % Max 0.001 Potassium (K) % Max 0.001 Sodium (Na) % Max 0.001 Zinc (Zn) % Max 0.0002

Specifications

Assay (by HClO4 titration; on dried basis) 98.5 - 101 % Identification To comply USP test Chloride content 19.0 -19.6 % Specific optical rotation ([]20/D; +20.4 to +21.4° c=8 in HCl; on driedsubstance) Loss on drying (at 105°C ; 3 hrs) Max 0.4 % Residue on ignition Max 0.1 %

Specifications

Assay Min 98.0 % Insoluble matter in HCl Max 0.05 % Total Sulphur Max 0.3 % Chloride (Cl) Max 0.05 % Nitrate (NO3) Max 0.005 % Ammonium (NH4) Max 0.005 %

Specifications

Assay (HCl titration) Min 99 % Insoluble matter (10 % dil. Max 0.01 % HCl) Chloride (Cl) Max 0.005 % Calcium (Ca) Max 0.01 % Iron (Fe) Max 0.002 % Heavy metals (by ICP-OES) Max 0.002 % Sodium (Na) Max 0.1 % Potassium (K) Max 0.01 %

Specifications

Assay (Ex acetate) % Min 99 Chloride (Cl) % Max 0.005 Sulfate (SO4) % Max 0.01 Iron (Fe) % Max 0.002 Lead (Pb) % Max 0.002 Potassium (K) % Max 0.005 Sodium (Na) % Max 0.01 Lead (Pb) % Max 0.002

Specifications

Dye content % Min 65.0 Solubility (Turbidity) 1 mg/mL, H2O Clear Absorption maxima in water 629 - 634 nm Loss on drying (at 110°C) % Max 12.0

Specifications

Assay (by HClO4 titration) Min 99% Specific optical rotation ([]20/D; c=4 in 6 M HCl; on dried substance) pH (1% solution) 5.5 - 7.0 Appearance of solution Passes test Insoluble matter in HCl 1 mol/L Passes test Loss on drying (at 105°C) Max 0.2% Residue on ignition (as SO4) Max 0.1% Chloride (Cl) Max 0.02% Sulphate (SO4) Max 0.03% Iron (Fe) Max 0.001% Heavy metal (as Pb) Max 0.001% Ammonium (NH4) Max 0.02% Foreign amino acids Other ninhydrin positive Max 0.3% substances (as glycine) Max 0.1%

Specifications

Assay Min 99 % Specific optical rotation n ([]20/D; 40 g/L 6M HCl; on dried substance) +40 to +43° pH (1% solution in CO2 5.5-7.0 free water) Chloride (Cl) Max 0.02 % Sulfate (SO4) Max 0.03 % Iron (Fe) Max 0.001 %

Specifications

Assay Min 99 % Specific optical rotation n ([]20/D; 40 g/L 6M HCl; on dried substance) +40 to +43° pH (1% solution in CO2 5.5-7.0 free water) Chloride (Cl) Max 0.02 % Sulfate (SO4) Max 0.03 % Iron (Fe) Max 0.001 %

Specifications

Assay 99-103 % Sodium (Na) Max 0.005 % Insoluble matter Max 0.01 % Chloride (Cl) Max 0.0005 % Nitrite & nitrate (NO3) Max 0.005 % Calcium (Ca) Max 0.005 % Copper (Cu) Max 0.002 % Iron (Fe) Max 0.001 % Potassium (K) Max 0.005 % Appearance A heavy white crystalline powder