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1.01307

Titan yellow (C.I. 19540)

Name: Titan yellow (C.I. 19540)
Brand: MM

metal indicator, Reag. Ph Eur

Synonym(s):

Titan yellow (C.I. 19540), Clayton yellow, Naphthamine G, Thiazole yellow

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About This Item

Empirical Formula (Hill Notation):

C₂₈H₁₉N₅Na₂O₆S₄

CAS Number:

1829-00-1

Molecular Weight:

695.72

UNSPSC Code:

12352107

EC Index Number:

217-377-4

NACRES:

NB.21

MDL number:

MFCD00013091

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Properties

Product Name

Titan yellow (C.I. 19540), indicator Reag. Ph Eur

agency

reag. Ph. Eur.

Quality Segment

200

form

solid

loss

≤8% loss on drying, 110°C

pH

5.1 (20 °C, 10 g/L in H₂O)

mp

>300 °C (decomposition)

solubility

29 g/L

bulk density

310 kg/m³

λ_max

398-402 nm (buffer pH 7.0)

storage temp.

2-30°C

SMILES string

[Na+].[Na+].[S](=O)(=O)([O-])c1c2[s]c(nc2ccc1C)c3ccc(cc3)N\N=N\c4ccc(cc4)c5[s]c6c(n5)ccc(c6[S](=O)(=O)[O-])C

InChI

1S/C28H21N5O6S4.2Na/c1-15-3-13-21-23(25(15)42(34,35)36)40-27(29-21)17-5-9-19(10-6-17)31-33-32-20-11-7-18(8-12-20)28-30-22-14-4-16(2)26(24(22)41-28)43(37,38)39;;/h3-14H,1-2H3,(H,31,32)(H,34,35,36)(H,37,38,39);;/q;2*+1/p-2

InChI key

CZIRZNRQHFVCDZ-UHFFFAOYSA-L

Description

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λ_max. (buffer pH 7.0): 398 - 402 nm
Spec. Absorptivity A 1%/1cm (λ_max; 0.01 g/l; buffer pH 7.0; calc. on dried substance): ≥ 350
Transition range: pH 12.0 - pH 13.0Yellow - orange
Loss on drying (110 °C): ≤ 8 %
Suitability as reagent (for magnesium): passes test

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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