Welcome to LookChem.com Sign In|Join Free

CAS

  • or

157143-21-0

Post Buying Request

157143-21-0 Suppliers

Recommended suppliersmore

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

157143-21-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 157143-21-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,7,1,4 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 157143-21:
(8*1)+(7*5)+(6*7)+(5*1)+(4*4)+(3*3)+(2*2)+(1*1)=120
120 % 10 = 0
So 157143-21-0 is a valid CAS Registry Number.

157143-21-0Downstream Products

157143-21-0Relevant articles and documents

3-Alkoxy Substituted Oligo- and Poly(1,4-phenyleneethenylene)s

Kretzschmann, H.,Meier, H.

, p. 255 - 259 (1994)

The 3-alkoxy-4-methylbenzaldehydes (3a-e) can be obtained by alkylation of the hydroxy compound 1.Reaction with aniline yields the azomethines (4a-e) which enter in an alkaline medium a polycondensation to the title compounds 5a-e.Contrary to the 2-substituted educts, a competitive intramolecular condensation process is principally not possible.Benzoylation of 1 furnisches 3f.However, the corresponding Schiff base 4 f is not capable of a condensation reaction because the ester group is cleaved.

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 157143-21-0