1.07297

Phthalein purple

metal indicator Reag. Ph Eur

• Synonym(s): Phthalein purple, Xylenolphthalein-bis(iminodiacetic acid), Metal phthaleine, Cresol phthalexone
• Empirical Formula (Hill Notation): C₃₂H₃₂N₂O₁₂
• CAS Number: 2411-89-4
• Molecular Weight: 636.60
• MDL number: MFCD00005911
• UNSPSC Code: 12171502
• EC Index Number: 219-318-8

Properties

• Agency: reag. Ph. Eur.
• Quality Level: 200
• form: solid
• impurities: ≤10% Water (Karl Fischer)
• mp: 186 °C
• bulk density: 50 kg/m³
• λmax: 577-580 nm in 0.1 M NaOH
• storage temp.: 2-30°C
• InChI: 1S/C32H32N2O12.4Na/c1-17-7-21(9-19(29(17)43)11-33(13-25(35)36)14-26(37)38)32(24-6-4-3-5-23(24)31(45)46-32)22-8-18(2)30(44)20(10-22)12-34(15-27(39)40)16-28(41)42;;;;/h3-10,43-44H,11-16H2,1-2H3,(H,35,36)(H,37,38)(H,39,40)(H,41,42);;;;/q;4*+1/p-4
• InChI key: KSMPPVYJZJBIES-UHFFFAOYSA-J

Description

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max.(Sodium hydroxide solution 0.1 mol/l): 577 - 580 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.005 g/l;sodium hydroxide solution 0.1 mol/l;calc. on anhydrous substance): ≥ 750
Water (according to Karl Fischer): ≤ 10 %
Suitability as indicator (for metal titration): passes test

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable