Title: Cacotheline
CAS Registry Number: 561-20-6
CAS Name: 2,3-Dihydro-4-nitro-2,3-dioxo-9,10-secostrychnidin-10-oic acid
Molecular Formula: C21H21N3O7
Molecular Weight: 427.41
Percent Composition: C 59.01%, H 4.95%, N 9.83%, O 26.20%
Literature References: A nitro derivative of brucine made by treating brucine with 10% nitric acid at 60-70°: Leuchs et al., Ber. 43, 1042 (1910). Structure: Teuber, ibid. 86, 232 (1953). Used as reversible redox indicator for Sn+2 titrations: P. Szarvas, J. Lantos, Talanta 10, 477 (1963).
Properties: Yellow crystals; sparingly sol in water.
Use: Indicator.
Cactinomycin Cactus Grandiflorus Cadalene Cadaverine Cadexomer Iodine

CAS number 561-20-6
PubChem 6841
ChemSpider 61696
Jmol-3D images Image 1
Molecular formula C21H21N3O7
Molar mass 427.41 g/mol
Appearance Yellow crystals
Density 1.62 g/cm3
Flash point 374.6 °C; 706.3 °F; 647.8 K
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Cacotheline is an organic compound with the chemical formula C21H21N3O7. It is a nitro derivative of brucine obtained by reaction of brucine with nitric acid.[1] It is used as an indicator in the titrimetric analysis of tin ions (Sn2+).