Disiarczek sodowy ExpertQ® do analizy, ACS, Reag. Ph Eur – SCHARLAU
Additional information
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POBIERZ KARTĘ PRODUKTU
POBIERZ KARTĘ POZIOMU JAKOŚCI
POBIERZ KARTĘ CHARAKTERYSTYKI PRODUKTU
PRODUCENT: SCHARLAB
Sodium disulfite, ExpertQ®, ACS, Reag. P
Pirosiarczyn sodowy
– Synonyms: Sodium metabisulfite, Sodium pyrosulfite
– Na2S2O5
– M = 190,10 g/mol
– CAS [7681-57-4]
– EINECS-No.: 231-673-0
– Solub. in water: (20 ºC): ~ 650 g/l
– Melting point: ~ 150 ºC (decomposes)
– LD 50 (oral, rat): 1540 mg/kg
– GHS-signal word: Danger
– GHS-H sentences: H318 – H302 – EUH031
– GHS-P sentences: P280 – P264 – P270 – P305+P351+P338 – P330 – P501a
– Tariff number: 2832 10 00 00
– Applications: analytical chemistry, laboratory reagent, bleaching agent, reducing agent (manufacture of dyes), antioxidant (in the pharmaceutics industry), in food industry (E 223), preservative agent.
SPECIFICATIONS
assay (iodometric): 97,0 – 100,5 %
identity (IR-spectrum): passes test
Identification sodium: passes test:
appearance of solution: clear and colourless
reaction of sulphates: passes test:
insoluble in water: max. 0,005 %
pH (5 %, H2O): 3,5 – 5,0
chlorides (Cl): max. 0,005 %
thiosulfates (S2O3): max. 0,05 %
thiosulfates (S2O3): passes test
arsenic (As): max. 5 ppm
heavy metals (as Pb): max. 0,001 %
iron (Fe): max. 5 ppm
lead (Pb): max. 5 ppm
