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1.07297

Phthalein purple

Name: Phthalein purple
Brand: MM

metal indicator, Reag. Ph Eur

Synonym(s):

Phthalein purple, Xylenolphthalein-bis(iminodiacetic acid), Metal phthaleine, Cresol phthalexone

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About This Item

Empirical Formula (Hill Notation):

C₃₂H₃₂N₂O₁₂

CAS Number:

2411-89-4

Molecular Weight:

636.60

UNSPSC Code:

12171502

EC Index Number:

219-318-8

NACRES:

NA.21

MDL number:

MFCD00005911

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Properties

Product Name

Phthalein purple, metal indicator Reag. Ph Eur

agency

reag. Ph. Eur.

Quality Segment

200

form

solid

impurities

≤10% Water (Karl Fischer)

mp

186 °C

bulk density

50 kg/m³

λ_max

577-580 nm in 0.1 M NaOH

storage temp.

2-30°C

SMILES string

[Na+].[Na+].[Na+].[Na+].N(Cc1c(c(cc(c1)C3(OC(=O)c4c3cccc4)c2cc(c(c(c2)C)O)CN(CC(=O)[O-])CC(=O)[O-])C)O)(CC(=O)[O-])CC(=O)[O-]

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

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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