Welcome to LookChem.com Sign In|Join Free

CAS

  • or

23990-42-3

Post Buying Request

23990-42-3 Suppliers

Recommended suppliersmore

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

23990-42-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 23990-42-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,9,9 and 0 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 23990-42:
(7*2)+(6*3)+(5*9)+(4*9)+(3*0)+(2*4)+(1*2)=123
123 % 10 = 3
So 23990-42-3 is a valid CAS Registry Number.

23990-42-3Relevant articles and documents

Synthesis of some new fused and polyfused quinoxalines

Abdel-Ghany

, p. 259 - 268 (2000)

2,3-Dimercaptoquinoxaline 1 was allowed to react with some dihalo compounds and chloroanil using PTC technique to afford the corresponding polyfused quinoxalines 2a-d. The reaction of compound 1 with different monohalo compounds under the same PTC conditi

Syntheses of Polycyclic 1,4-dithiines and Related Heterocycles

Matsuoka, Masaru,Iwamoto, Akihiro,Furukawa, Naoyuki,Kitao, Teijiro

, p. 439 - 443 (2007/10/02)

Reactions of dihalogenoquinones or dihalogenoquinoxalines with thioamides gave the corresponding 1,4-dithiines in high yields.Many of polycyclic 1,4-dithiin derivatives can be synthesized by the reaction of dihalogenoheterocycles with thioamides, and they

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 23990-42-3