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Phthalein purple

metal indicator Reag. Ph Eur

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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
NACRES:
NA.21

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

Related Categories

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λmax.(Sodium hydroxide solution 0.1 mol/l): 577 - 580 nm
Spec. Absorptivity A 1%/1cm (λmax; 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

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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