481-26-5 Usage
Purification Methods
Crystallise 5-pregnane from MeOH or Me2CO. The mixed melting point with allopregnane (above) is ~50-71o. [Butenandt et al. Chem Ber 64 2529 1931, Steiger & Reichstein Helv Chim Acta 21 161 1938.]
Check Digit Verification of cas no
The CAS Registry Mumber 481-26-5 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,8 and 1 respectively; the second part has 2 digits, 2 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 481-26:
(5*4)+(4*8)+(3*1)+(2*2)+(1*6)=65
65 % 10 = 5
So 481-26-5 is a valid CAS Registry Number.
InChI:InChI=1/C21H36/c1-4-15-9-11-18-17-10-8-16-7-5-6-13-20(16,2)19(17)12-14-21(15,18)3/h15-19H,4-14H2,1-3H3/t15-,16?,17-,18-,19-,20-,21+/m0/s1