135-52-4 Usage
Chemical Properties
purple powder
Purification Methods
Zincon solution is prepared by dissolving 0.13g of the powder in aqueous N NaOH (2mL diluted to 100mL with H2O). This gives a deep red colour which is stable for one week. It is a good reagent for zinc ions but also forms stable complexes with transition metal ions. [UV-VIS: Bush & Yoe Anal Chem 26 1345 1954, Hunter & Roberts J Chem Soc 820 1941, Platte & Marcy Anal Chem 31 1226 1959] The free acid (see above) has been recrystallised from dilute H2SO4. [Fichter & Scheiss Chem Ber 33 751 1900, Beilstein 16 IV 421.]
Check Digit Verification of cas no
The CAS Registry Mumber 135-52-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,3 and 5 respectively; the second part has 2 digits, 5 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 135-52:
(5*1)+(4*3)+(3*5)+(2*5)+(1*2)=44
44 % 10 = 4
So 135-52-4 is a valid CAS Registry Number.
InChI:InChI=1/C20H16N4O6S.Na/c25-18-11-10-14(31(28,29)30)12-17(18)22-24-19(13-6-2-1-3-7-13)23-21-16-9-5-4-8-15(16)20(26)27;/h1-12,21H,(H,23,24)(H,26,27)(H,28,29,30);/q;+1/p-1/b22-17-;
