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Check Digit Verification of cas no

The CAS Registry Mumber 16980-67-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,9,8 and 0 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 16980-67:
(7*1)+(6*6)+(5*9)+(4*8)+(3*0)+(2*6)+(1*7)=139
139 % 10 = 9
So 16980-67-9 is a valid CAS Registry Number.

InChI:InChI=1/C24H38O4/c1-14-12-21-19-7-6-17-13-18(28-16(3)26)8-10-22(17,4)20(19)9-11-23(21,5)24(14,27)15(2)25/h14,17-21,27H,6-13H2,1-5H3/t14-,17+,18+,19-,20+,21+,22+,23+,24+/m1/s1

16980-67-9SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 19, 2017

Revision Date: Aug 19, 2017

1.Identification

1.1 GHS Product identifier

Product name	[(3S,5S,8R,9S,10S,13S,14S,16R,17R)-17-acetyl-17-hydroxy-10,13,16-trimethyl-1,2,3,4,5,6,7,8,9,11,12,14,15,16-tetradecahydrocyclopenta[a]phenanthren-3-yl] acetate

1.2 Other means of identification

Product number	-
Other names	16-Methyl-3,17-dihydroxy-5alpha-pregnane-20-one-3-acetate

1.3 Recommended use of the chemical and restrictions on use

Identified uses	For industry use only.
Uses advised against	no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number	-
Service hours	Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:16980-67-9 SDS

16980-67-9Upstream product

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16980-67-9Relevant articles and documents

Crystal structure of 3β-acetoxy-17α-hydroxy-16α- methylallopregnan-20-one hemihydrate

Bandhoria, Pankaj,Gupta, Vivek K.,Gupta,Varghese

, p. 427 - 433 (2008/02/09)

3β-Acetoxy-17α-hydroxy-16α-methylallopregnan-20-one, C24H38O4?0.5H2O, is an intermediate towards the synthesis of dexamethasone, an important corticosteroid. The compound crystallizes in the monoclinic space group C2 with unit cell parameters: a = 10.665(2) A, b = 7.497(1) A, c = 28.200(4) A, β = 92.74(2)°, Z = 4. The crystal structure has been solved by direct methods and refined to R = 0.0419 for 1579 observed reflections. All rings of the steroid skeleton are trans connected. Rings A, B, and C are all in the chair conformation. Ring D is in envelop conformation. The acetoxy and acetyl substituents are twisted with respect to the average molecular plane of the steroid. The twist along the length of the steroid molecule is negligible [C19-C10???C13-C18 = 2.3°]. In the crystal structure, the water molecule lies on a twofold axis which links the molecules into infinite supramolecular chains through OW-H???O and O- H???OW hydrogen bonds.

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16980-67-9