The chemical compound "Yb(3+)*C16H7N3O10S2(4-)" represents a complex where the trivalent ytterbium ion (Yb^3+) is coordinated with a negatively charged organic ligand, C16H7N3O10S2^4-. This ligand is a sulfated derivative of a heterocyclic aromatic compound, containing sulfur, oxygen, nitrogen, carbon, and hydrogen atoms. The overall charge of the complex is neutral, as the +3 charge of the ytterbium ion is balanced by the -4 charge of the ligand, resulting in a complex with a net charge of -1, denoted as Yb(C16H7N3O10S2)^(1-). This type of complex is common in coordination chemistry, where metal ions form bonds with various organic and inorganic ligands to create stable complexes with unique properties.
The CAS Registry Mumber 19624-11-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,6,2 and 4 respectively; the second part has 2 digits, 1 and 1 respectively. Calculate Digit Verification of CAS Registry Number 19624-11: (7*1)+(6*9)+(5*6)+(4*2)+(3*4)+(2*1)+(1*1)=114 114 % 10 = 4 So 19624-11-4 is a valid CAS Registry Number.