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75424-89-4

75424-89-4

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75424-89-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 75424-89-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,5,4,2 and 4 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 75424-89:
(7*7)+(6*5)+(5*4)+(4*2)+(3*4)+(2*8)+(1*9)=144
144 % 10 = 4
So 75424-89-4 is a valid CAS Registry Number.

75424-89-4SDS

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 2-benzylidene-2H-chromene

1.2 Other means of identification

Product number -
Other names -

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:75424-89-4 SDS

75424-89-4Downstream Products

75424-89-4Relevant articles and documents

REACTION OF 1-BENZOPYRYLIUM SALTS WITH TRIALKYL PHOSPHITE: FORMATION OF 2,4-DISUBSTITUTED 1-BENZOPYRAN DERIVATIVES

Iwasaki, Hideharu,Akiba, Kin-ya

, p. 2857 - 2860 (2007/10/02)

Reaction of 1-benzopyrylium perchlorate (1) with triethyl phosphite gave 2H-benzopyran-2-phosphonate (2) in good yield.Deprotonation of 2 with sec-BuLi at -78 deg C foolowed by addition of aromatic aldehydes gave exomethylene compound (4).Reaction of ketene solyl acetal (7) with 2-substituted 1-benzopyrylium salt (6), generated in situ from 4 by addition of CF3SO3H, afforded the corresponding 2,4-disubstituted 1-benzopyran (8).

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