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3β-hydroxypregna-5,17(20)-dien-21-oic acid is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

21929-91-9

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21929-91-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21929-91-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,2 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21929-91:
(7*2)+(6*1)+(5*9)+(4*2)+(3*9)+(2*9)+(1*1)=119
119 % 10 = 9
So 21929-91-9 is a valid CAS Registry Number.

21929-91-9Upstream product

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