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189937-21-1

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189937-21-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 189937-21-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,9,3 and 7 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 189937-21:
(8*1)+(7*8)+(6*9)+(5*9)+(4*3)+(3*7)+(2*2)+(1*1)=201
201 % 10 = 1
So 189937-21-1 is a valid CAS Registry Number.

189937-21-1SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 19, 2017

Revision Date: Aug 19, 2017

1.Identification

1.1 GHS Product identifier

Product name acetic acid-(2,4-dibromo-6-methyl-anilide)

1.2 Other means of identification

Product number -
Other names 3.5-Dibrom-2-acetamino-toluol

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:189937-21-1 SDS

189937-21-1Downstream Products

189937-21-1Relevant articles and documents

New insights into bromination process: Effective preparation of Ambroxol

Xu, Jun-Hui,Ma, Yan-Qiong,Wei, Jian-Ping,Li, Fang-Mei,Peng, Xin-Hua

, p. 722 - 728 (2015)

Ambroxol used as an expectorant in treating respiratory diseases was effectively prepared with a total yield of 62 %, with o-toluidine as the feedstock via successive procedures of electrophilic bromination, acetylation, radical benzylic bromination, N-alkylation and hydrolysis processes. The addition of aqueous hydrogen peroxide could enhance the utilisation of liquid bromine in the electrophilic bromination of o-toluidine, avoiding the hazardous HBr generated as a by-product. In addition, liquid bromine promoted by MnO2 was used efficiently for the radical benzylic bromination of N-acetyl-N-(2,4-dibromo-6-methylphenyl)acetamide under mild conditions.

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