Welcome to LookChem.com Sign In|Join Free

CAS

  • or

257-05-6

257-05-6

Post Buying Request

257-05-6 Suppliers

Recommended suppliersmore

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

257-05-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 257-05-6 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 2,5 and 7 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 257-05:
(5*2)+(4*5)+(3*7)+(2*0)+(1*5)=56
56 % 10 = 6
So 257-05-6 is a valid CAS Registry Number.
InChI:InChI=1/C14H10O/c1-3-7-13-11(5-1)9-10-12-6-2-4-8-14(12)15-13/h1-10H

257-05-6SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 15, 2017

Revision Date: Aug 15, 2017

1.Identification

1.1 GHS Product identifier

Product name benzo[b][1]benzoxepine

1.2 Other means of identification

Product number -
Other names dibenzo[b,f]oxepine

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:257-05-6 SDS

257-05-6Relevant articles and documents

Three-step synthesis of (thio)xanthene and dibenzothiepine/dibenzoxepine by an intramolecular Mizoroki-Heck reaction of diaryl (thio)ethers

Jepsen, Tue Heesgaard,Larsen, Mogens,J?rgensen, Morten,Nielsen, Mogens Br?ndsted

, p. 418 - 422 (2012/03/11)

We present a novel three-step protocol for preparing xanthene/thioxanthene and dibenzothiepine/dibenzoxepine from readily available starting materials. The Mizoroki-Heck cyclization as the final step was optimized to afford full conversion of the corresponding diaryl (thio)ethers and furthermore to achieve reasonably good selectivity between the 6-exo and the 7-endo products. Georg Thieme Verlag Stuttgart · New York.

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 257-05-6