描述
Identification
C21H14N2O7S
M = 438,42 g/mol
EC number: 223-117-0
Taric code: 2927 00 00
Synonyms
2-Hydroxy-1-(2-hydroxy-4-sulpho-1-naphthylazo)-3-naphthoic acid
Applications
analytical chemistry, indicator, for the identification of: calcium.
Specifications
Absorption maximum l (in ethanol) …………….. 569 – 572 nm
Absorptivity (A1%/1 cm; l1; pH 3,0
on dried sample)……………………………………….. 250 – 400
water (K.F.)………………………………………………… max. 9 %
suitability as indicator for metal
titration ……………………………………………………… passes test
Physical data
• Bulk density: ~ 400 kg/m3
• Solub. in water: (20 ºC): insoluble
• Melting point: 300 ºC
Toxicological data
• WGK: 3*
Transport/storage
• Store between 5ºC and 30ºC
