Kwas benzoesowy Titrasure® drugorzędowy materiał referencyjny (wzorzec wtórny) do miareczkowania, w odniesieniu do SRM z NIST – Scharlau
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PRODUCENT: SCHARLAB
Benzoic acid, secondary standard
– Synonyms: Benzenecarboxylic acid, Phenylformic acid
– C7H6O2
– M = 122,12 g/mol
– CAS [65-85-0]
– EINECS-No.: 200-618-2
– Solub. in water: (20 ºC): 3,4 g/l
– Melting point: 121,5 – 123,0 ºC
– Boiling point: ~ 249 ºC
– Flash pt. 121 ºC
– Ignition temp.: 532 ºC
– Vapour pressure: (20 ºC) 1,3 hPa
– LD 50 (oral, rat): 1700 mg/kg
– GHS-signal word: Warning
– GHS-H sentences: H315 – H318 – H372
– GHS-P sentences: P260 – P264 – P270 – P305+P351+P338 – P310 – P321 – P362+P364 – P501a
– Tariff number: 2916 31 00 90
– Applications: analytical chemistry, preservative agent, manufacture of dyes.
SPECIFICATIONS
assay (on dried sample): min. 99,5 %
melting point: 122 – 123 °C
insoluble in CH3OH: max. 0,005 %
chlorine compounds (as Cl): max. 0,005 %
sulfur compounds (as S): max. 0,002 %
heavy metals (as Pb): max. 5 ppm
substances reducing KMnO4 : passes test
residue on ignition: max. 0,005 %
This standard solution is traceable to Standard Reference Material from NIST.
