561-20-6 Usage
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.]
Check Digit Verification of cas no
The CAS Registry Mumber 561-20-6 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,6 and 1 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 561-20:
(5*5)+(4*6)+(3*1)+(2*2)+(1*0)=56
56 % 10 = 6
So 561-20-6 is a valid CAS Registry Number.
InChI:InChI=1/C21H21N3O7/c25-12-6-11-17(18(19(12)28)24(29)30)22-20-16-10-5-14-21(11,20)2-3-23(14)8-9(10)1-4-31-13(16)7-15(26)27/h1,6,10,13-14,16,20,22H,2-5,7-8H2,(H,26,27)
