- Synonyms: Nitrous acid potassium salt - KNO2 - M = 85,11 g/mol - CAS [7758-09-0] - EINECS-No.: 231-832-4 - Solub. in water: (20 ºC): soluble - Melting point: 440 ºC - EC-Index-No.: 007-011-00-X - ADR: 5.1 O2 II UN 1488 - IMDG: 5.1 II UN 1488 - IATA/ICAO: 5.1 II UN 1488 - GHS-signal word: Danger - GHS-H sentences: H272 - H301 - H400 - GHS-P sentences: P221 - P210 - P301+P310 - P370+P378 - P405 - P501a - Tariff number: 2834 10 00 00 - Applications: analytical chemistry, laboratory reagent, in food industry, preservative agent (E-249), for determination of: aminoacids, cobalt, iodine, urea. SPECIFICATIONS assay (permanganometric): min. 96,0 % insoluble in water: max. 0,01 % pH (5 %, H2O): 7,0 - 10,0 chlorides (Cl): max. 0,01 % sulfates (SO4): max. 0,01 % calcium (Ca): max. 0,003 % heavy metals (as Pb): max. 0,001 % iron (Fe): max. 0,001 % sodium (Na): max. 0,5 %