Welcome to LookChem.com Sign In|Join Free

CAS

  • or

221696-16-8

Post Buying Request

221696-16-8 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

221696-16-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221696-16-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,6,9 and 6 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 221696-16:
(8*2)+(7*2)+(6*1)+(5*6)+(4*9)+(3*6)+(2*1)+(1*6)=128
128 % 10 = 8
So 221696-16-8 is a valid CAS Registry Number.

221696-16-8Relevant articles and documents

Benzotriazole-Mediated 4-Position Derivatization of 2,6-Diarylpyrylium Cations by Electrophiles

Katritzky, Alan R.,Du, Weihong,Denisenko, Sergey N.,Czerney, Peter,Steel, Peter J.

, p. 152 - 158 (1999)

2,6-Diaryl-4H-(benzotriazolyl)pyrans (7a-c) on treatment with n-butyllithium undergo smooth lithiation at the position α to the benzotriazolyl moiety. In contrast to fused and bridged pyranyl derivatives, these pyranyl anions react with electrophiles by t

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 221696-16-8