Welcome to LookChem.com Sign In|Join Free

CAS

  • or

3991-53-5

Post Buying Request

3991-53-5 Suppliers

Recommended suppliersmore

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

3991-53-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 3991-53-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,9,9 and 1 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 3991-53:
(6*3)+(5*9)+(4*9)+(3*1)+(2*5)+(1*3)=115
115 % 10 = 5
So 3991-53-5 is a valid CAS Registry Number.

3991-53-5Relevant articles and documents

Preparation method of β - carotene with high total trans content

-

Paragraph 0063-0064, (2021/09/01)

The invention provides a preparation method of β - carotene with a high total trans content. Starting from the vitamin A derivative, C20 phosphine salt is obtained through reaction with triphenylphosphine, and the C20 phosphine salt is subjected to condensation reaction under the action IBX high iodine compound and base to obtain β - carotene containing cis-trans, and then the β - carotene with high trans content is obtained under the action of a transition metal loading catalyst. The method avoids the use of a strong oxidizing agent in the traditional process, is environmentally friendly and can reduce the peroxidation of β - carotene, so that the reaction yield is increased, and the transition metal catalyst enables the obtained β - carotene content to be full. Trans increase.

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 3991-53-5