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Potassium nitrate, Pharmpur®, Ph Eur, BP, USP

- Synonyms: Nitric acid potassium salt, Saltpeter
- KNO3
- M = 101,11 g/mol
- CAS [7757-79-1]
- EINECS-No.: 231-818-8
- Solub. in water: (20 ºC): 320 g/l
- Melting point: 334 ºC
- LD 50 (oral, rat): 3750 mg/kg
- ADR: 5.1 O2 III UN 1486
- IMDG: 5.1 III UN 1486
- IATA/ICAO: 5.1 III UN 1486
- GHS-signal word: Danger
- GHS-H sentences: H272
- GHS-P sentences: P221 - P210 - P220 - P280 - P370+P378 - P501a
- Tariff number: 2834 21 00 00
- Applications: analytical chemistry, laboratory reagent, oxidizing agent, in pyrotechnics, manufacture of glass, in food industry.

SPECIFICATIONS

dried sample): 99,0 - 101,0 %
assay (acidimetric): 99,0 - 100,5 %
Identification potassium: passes test
Identification nitrates: passes test
appearance of solution: clear and colourless
acidity or alkalinity: passes test
chlorides (Cl): max. 20 ppm
nitrites (NO2): max. 5 ppm
sulfates (SO4): max. 150 ppm
ammonium (NH4): max. 100 ppm:
arsenic (As): max. 3 ppm
calcium (Ca): max. 100 ppm:
iron (Fe): max. 10 ppm
lead (Pb): max. 10 ppm
sodium (Na): max. 0,1 %
reducible substances: passes test
loss on drying (105 ºC): max. 0,5 %