CACOTHELINE Chemical Properties

Melting point:

>299.85°C

Boiling point:

542.58°C (rough estimate)

Density 

1.4011 (rough estimate)

refractive index 

1.6300 (estimate)

pka

4.18±0.10(Predicted)

form 

Solid

color 

White to yellow crystal

Merck 

14,1605

CAS DataBase Reference

561-20-6(CAS DataBase Reference)

EPA Substance Registry System

Cacotheline (561-20-6)

Safety Information

Safety Statements 

22-24/25

RIDADR 

2811

HS Code 

2939.79.0000

HazardClass 

6.1(b)

PackingGroup 

III

CACOTHELINE Usage And Synthesis

Uses

Indicator.

Purification Methods

Cacotheline gives yellow crystals from H2O. It is then dried over H2SO4 which gives the dihydrate, and in a vacuum over H2SO4 at 105o it forms the anhydrous compound. The hydrochloride separates as the hydrate (on heating in vacuum at 80o) in orange-yellow prisms or plates, m 250o(dec) and forms a resorcinol complex which gives brown crystals from EtOH, m 325o, and a hydroquinone complex as dark red crystals from EtOH, m 319o. [Leuchs & Leuchs Chem Ber 43 1042 1910, Teuber Chem Ber 86 232, (UV: 242) 1953; complexes: Gallo Gazz Chim Ital 85 1441 1955.] It is used in the titrimetric estimation of Sn2+ ions [Szrvas & Lantos Talanta 10 477 1963]. [Beilstein 27 III/IV 8014.]

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