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Titan yellow (C.I. 19540)

indicator Reag. Ph Eur

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Synonym(s):
Titan yellow (C.I. 19540), Clayton yellow, Naphthamine G, Thiazole yellow
Empirical Formula (Hill Notation):
C28H19N5Na2O6S4
CAS Number:
Molecular Weight:
695.72
MDL number:
EC Index Number:
217-377-4

Agency

reag. Ph. Eur.

Quality Level

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

λmax

398-402 nm (buffer pH 7.0)

storage temp.

2-30°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

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This Item
88390228478206865
Titan yellow (C.I. 19540) indicator Reag. Ph Eur

Supelco

1.01307

Titan yellow (C.I. 19540)

Thiazole Yellow G for microscopy (fluorescence indicator), adsorption indicator

Sigma-Aldrich

88390

Thiazole Yellow G

Primuline Dye content 50 %

Sigma-Aldrich

206865

Primuline

pH

5.1 (20 °C, 10 g/L in H2O)

pH

-

pH

-

pH

-

mp

>300 °C (decomposition)

mp

-

mp

-

mp

>300 °C

solubility

29 g/L

solubility

hot water: 0.1 g/10 mL

solubility

-

solubility

-

λmax

398-402 nm (buffer pH 7.0)

λmax

-

λmax

404 nm

λmax

229 nm (2nd), 340-355 nm

storage temp.

2-30°C

storage temp.

room temp

storage temp.

room temp

storage temp.

room temp

Analysis Note

Identity (UV/VIS-Spectrum): passes test
Absorption maximum λmax. (buffer pH 7.0): 398 - 402 nm
Spec. Absorptivity A 1%/1cm (λmax; 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 Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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