Reagents

Specifications

Assay % Min 95 Heavy metals (as Pb) % Max 0.001 Iron (Fe) % Max 0.005 pH (1% solution in water) 10.0 - 10.7

Specifications

Assay (iodometric) Min 98.00 % Chloride (Cl) Max 0.005 % Iron (Fe) Max 0.002 % Heavy metals (as Pb) Max 0.005 % Manganese (Mn) Max 0.0005 % Appearance A white powder

Specifications

Assay Min 98 % Insoluble matter Max 0.003 % Chloride (Cl) Max 0.002 % Ammonium (NH4) Max 0.0005 % Arsenic (As) Max 0.00004 % Copper (Cu) Max 0.001 % Iron (Fe) Max 0.0005% Lead (Pb) Max 0.001 % Manganese (Mn) Max 0.0001 % Appearance A white powder

Specifications

Assay (oxidimetric) 99.0 ÷ 100.5 % Identification Positive Appearance of solution Ph.Eur Conform Water-insoluble matter Max 0.2 % Chloride & Chlorate(Cl) Max 0.005 % Sulphate Max 0.02 % Appearance Dark violet crystals

Specifications

Tolerance +/- 0.0005M Appearance Purple solution The standardisation material (sodium thiosulphate) is a secondary reference material traceable to NIST Standard Reference Material arsenic trioxide, number 83d.

Specifications

Normality 0.995-1.005 Appearance Clear violet liquid

Specifications

Assay (acidimetric) Min 99 % pH (5% sol in water) 4.5 - 8.5 Chloride (Cl) Max 0.01 % Sulfate (SO4) Max 0.01 % Ammonium (NH4) Max 0.004 % Arsenic (As) Max 0.0003 % Lead (Pb) Max 0.005 % Iron (Fe) Max 0.001 % Appearance White crystalline powder

Specifications

Appearance Fine crystals Colour White Odour Odourless pH (5% solution) 8,5 Content of KNO₃ on the anhydrous basis, % (m/m) 99,5 Moisture (as loss on drying at 105°C), % (m/m) 1 Nitrites expressed as KNO₂, (mg/kg) 10 Arsenic (as As), (mg/kg) 0,1 Lead (as Pb), (mg/kg) 0,1 Mercury (as Hg), (mg/kg) 0,1 Ethylene oxide residues (ethylene oxide + 2-chloro-ethanol), (mg/kg) 0,1 Insoluble matter, % (m/m) 0,005 Chlorides (as NaCl), % (m/m) 0,001 Ammonium (NH4) absent Phosphate (PO4), % (m/m) 0,0005 Sulfate (SO4), % (m/m) 0,003 Iodate (IO3), % (m/m) 0,0005 Sodium (Na), % (m/m) 0,02 Heavy metals (as Pb²⁺), % (m/m) 0,0005

Specifications

Assay 95.0 – 99.9 % Iodometric, SO2 54.8 – 57.6 % pH (5% in water) 3.0 – 4.5 Chloride (Cl) Max. 0.05 % Heavy metals (as Pb) Max. 0.001 % Copper (Cu) Max. 0.0025 % Zinc (Zn) Max. 0.0025 % Iron (Fe) Max. 0.002 % Selenium (Se) Max. 0.0005 % Arsenic (As) Max. 0.0002 % Mercury (Hg) Max. 0.0001 %

Specifications

Assay Min 97 % Insoluble matter in water Max 0.005 % Chloride (Cl) Max 0.005 % Copper (Cu) Max 0.005 % Lead (Pb) Max 0.005 % Iron (Fe) Max 0.005 % Zinc (Zn) Max 0.005 % Cadmium (Cd) Max 0.005 % Appearance White crystalline powder

Specifications

Assay 99.8 - 100.3 % Insoluble matter in water Max 0.005 % Loss on drying (105°C) Max 0.1 % Chloride, chlorate and Max.0.01 % bromide, bromate (as Cl) Iodide (I) Max 0.001 % Manganese (Mn) Max 0.00015 % Sulphate (SO4) Max 0.01 %

Specifications

Assay (as Kl, on anhydrous basis) 99-100.5 % Insoluble matter in water Max 0.01 % Nitrate, Nitrite and ammonia Passes test Chloride and bromide (as Cl) Max 0.05 % Free alkali (as K2CO3) ) as per pharma Passes test

Specifications

Assay (on anhydrous basis) Min 99.5 % Heavy metals (as Pb) Max 0.0005 % Nitrogen compounds (as N) Max 0.001 % Thiosulfate Max 0.005 % Free alkali Max 0.02 % Loss on drying (at 105°C) Max 0.2 % pH (5% solution) 6.0-9.0 Chloride & bromide (as Cl) Max 0.01 % Iodate (IO3) Max 0.0005 % Phosphate (PO4) Max 0.001 %

Specifications

Tolerance +/- 0.005M Appearance Clear solution The standardisation material (potassium iodate) is traceable to NIST Standard Reference Material arsenic trioxide, no. 83d.

Specifications

Normality 0.1N +/- 0.1 % Appearance A clear colourless solution

Specifications

Assay Min 99.5 % pH (5% solution in water) 5-8 Heavy metals (as Pb) Max 0.0006 % Chloride, chlorate and Max 0.02 % bromide, bromate (as Cl) Total nitrogen (N) Max 0.002 % Iodide (I) Max 0.002 % Sulfate (SO4) Max 0.006 %

Specifications

Assay (as KOH) Min 85 % Carbonate (as K2CO3) Max 2.0 % Chloride (Cl) Max 0.02 % Sulphate (SO4) Max 0.01 % Heavy metal (as Pb) Max 0.002 % Iron (Fe) Max 0.002 % Appearance White deliquescent pellets

Specifications

Assay (as KOH) Min 85 % Carbonate (as K2CO3) Max 2.0 % Chloride (Cl) Max 0.02 % Sulphate (SO4) Max 0.01 % Heavy metal (as Pb) Max 0.002 % Iron (Fe) Max 0.002 % Appearance White deliquescent pellets

Specifications

Assay (as KOH) 85.0 - 100.5 % Carbonate (as K2CO3) Max 1.0 % Chloride (Cl) Max 0.005 % Total nitrogen (N) Max 0.001 % Phosphate (PO4) Max 0.0005 % Sulfate (SO4) Max 0.003 % Calcium (Ca) Max 0.005 % Iron (Fe) Max 0.001 % Nickel (Ni) Max 0.001 % Heavy metal (as Pb) Max 0.001 % Heavy metal (as Pb) Max 0.001 % Appearance White deliquescent pellets

Specifications

Assay (as KOH) 85.0 - 100.5 % Carbonate (as K2CO3) Max 1.0 % Chloride (Cl) Max 0.005 % Total nitrogen (N) Max 0.001 % Phosphate (PO4) Max 0.0005 % Sulfate (SO4) Max 0.003 % Calcium (Ca) Max 0.005 % Iron (Fe) Max 0.001 % Nickel (Ni) Max 0.001 % Heavy metal (as Pb) Max 0.001 % Heavy metal (as Pb) Max 0.001 % Appearance White deliquescent pellets

Specifications

Concentration 1M +/- 0.005M (1.0N) The concentration of this volumetric solution was determined with Potassium Hydrogen Phthalate. Reference material traceable to standard reference material of NIST Potassium Hydrogen Phthalate, no. 841.

Specifications

titration factor 0.998-1.002

Specifications

Assay (as KHSO4) Min 98 % Chloride (Cl) Max 0.005 % Heavy metals (as Pb) Max 0.005 % Iron (Fe) Max 0.005 % Calcium (Ca) Max 0.02 % Appearance White crystalline powder