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Inorganic Salts

Potassium Nitrate AR

RA002155 CAS 7757-79-1 AR

Identity

Product code
RA002155
CAS number
7757-79-1
Grade
AR
Purity
99%
Molecular formula
KNO3
Molecular weight
101.11

Classification

Technical Data

Properties

PropertyValueUnit
Physical state at 20 °C Solid —
Colour White crystalline —
Odour Odorless —
pH value 5.5 - 8.0 —
Melting point/ Freezing point [°C] 334 °C °C
Boiling point [°C] 400 °C °C
Vapour density 3 —
Density [g/cm3] 2.109 g/cm3 g/cm3

These are recorded catalogue property values. Product specification limits, where available, are listed under Specifications.

Specifications

ParameterSpecificationUnit Method
Appearance White crystalline powder — —
Sulphate (SO4) Max 0.003 % % —
Phosphate (PO4) Max 0.0005 % % —
Lead (Pb) Max 0.0005 % % —
Arsenic (As) Max 0.0003 % % —
Iron (Fe) Max 0.0003 % % —
Calcium (Ca) Max 0.005 % % —
Sodium (Na) Max 0.02 % % —
Ammonium (NH4) Max 0.001 % % —
Iodate (IO3) Max 0.0005 % % —
Nitrite (NO2) Max 0.0005 % % —
Assay 99 - 100.5 % % Titration after Ion exchange
Loss on drying (105 °C) Max 0.5 % % —
Identity (acc. to pharmacopoeias) Passes test — —
Appearance of solution Passes test — —
Reducing substance Passes test — —
pH (20 °C) 4.5 - 8.5 — —
Acidity or alkalinity Passes test — —
Chloride (Cl) Max 0.001 % % —
Chlorate and perchlorate Passes test — —

3 grades of this substance are listed. Each grade is a separate product with its own specifications, pack sizes and documents.

Packaging

Pack size SKU
500 g RA002155-PK-500G