Welcome to LookChem.com Sign In|Join Free

CAS

  • or

9003-19-4

Post Buying Request

9003-19-4 Suppliers

Recommended suppliersmore

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

9003-19-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 9003-19-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,0 and 3 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 9003-19:
(6*9)+(5*0)+(4*0)+(3*3)+(2*1)+(1*9)=74
74 % 10 = 4
So 9003-19-4 is a valid CAS Registry Number.

9003-19-4Relevant articles and documents

Method for producing vinyl ether

-

Paragraph 0038-0073, (2020/07/15)

The invention relates to a method for producing vinyl ether. The method comprises the following steps: (A) reacting excessive alcohol with acetaldehyde, and carrying out a continuous acetalation reaction by using immobilized superacid as a catalyst to obtain a first mixture; (B) carrying out oil-water separation and adsorption dehydration on the first mixture to obtain a second mixture; (C) carrying out acetal catalytic decomposition on the second mixture under the catalysis of a high-efficiency catalyst to obtain a third mixture; (D) rectifying the third mixture, and washing with water to obtain a vinyl ether product. According to the method, the high-temperature heating process of acetal is avoided, and the safety risk of operation is reduced; and an efficient acetal decomposition catalyst is adopted, and an acetal decomposition reaction is carried out at a low temperature, so that side reactions are few, and the selectivity of a main product is improved.

Waste-free technology for N-methylmorpholine synthesis

Markosyan,Baghdasaryan,Hovhannisyan,Attaryan,Hasratyan

, p. 845 - 847 (2014/02/14)

-

Structural analogues of vitamin D

-

, (2008/06/13)

PCT No. PCT/EP94/02294 Sec. 371 Date Jun. 28, 1996 Sec. 102(e) Date Jun. 28, 1996 PCT Filed Jul. 7, 1994 PCT Pub. No. WO95/01960 PCT Pub. Date Jan. 19, 1995The present invention relates to analogues of vitamin D, which lack the combined presence of the trans-fused six-membered C-ring and of five-membered D-ring, but still possess a central part consisting of a substituted chain of five atoms, atoms which correspond to positions 8, 14, 13, 17 and 20 of vitamin D, and at the ends of which are connected, at position 20 a structural moiety representing part of the side-chain of vitamin D or of an analogue of vitamin D, and at position 8 the DELTA (5,7)-diene moiety connected to the A-ring of the active 1-alpha-hydroxy metabolite or of an established vitamin D analogue, to their preparation process, to preparation intermediates, to pharmaceutical preparations comprising these compounds and to their use in medicine.

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 9003-19-4