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21551-67-7

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21551-67-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21551-67-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,5 and 1 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 21551-67:
(7*2)+(6*1)+(5*5)+(4*5)+(3*1)+(2*6)+(1*7)=87
87 % 10 = 7
So 21551-67-7 is a valid CAS Registry Number.

21551-67-7SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 16, 2017

Revision Date: Aug 16, 2017

1.Identification

1.1 GHS Product identifier

Product name Dihydroardisiaquinone A

1.2 Other means of identification

Product number -
Other names 1,16-Bis-(2-hydroxy-5-methoxy-1,4-benzochinonyl-(3))-hexadecan

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:21551-67-7 SDS

21551-67-7Relevant articles and documents

Naturally occurring 5-lipoxygenase inhibitors. VI. Structures of ardisiaquinones D, E, and F from Ardisia sieboldii

Fukuyama,Kiriyama,Kodama,Iwaki,Hosozawa,Aki,Matsui

, p. 1391 - 1394 (2007/10/02)

New 1,4-benzoquinone derivatives, ardisiaquinones D (2), E (4), and F (5) along with the known ardisiaquinones A (1) and B (3) have been isolated from the leaves of Ardisia sieboldii (Myrsinaceae) and shown to be 5-lipoxygenase inhibitors. Their structure

Synthesis of New 3-(-2-Alkenyl)-2-hydroxy-5-methoxy-p-benzoquinones via Claisen Rearrangement of Original 5-Methoxy-4-(2-propenyloxy)-o-benzoquinones

Reinaud, Olivia,Capdevielle, Patrice,Maumy, Michel

, p. 293 - 300 (2007/10/02)

The Claisen rearrangement is extended to compounds containing the benzoquinone moiety, obtained by regioselective nucleophilic substitution on 4-(p-methoxyphenoxy)-5-methoxy-o-benzoquinone (1).In the most general case, 5-methoxy-4-(2-propenyloxy)-o-benzoquinones 3 rearrange quantitatively into (E)-3-(2-alkenyl-2-hydroxy-5-methoxy-p-benzoquinones 4.Furfuryl or (2-thienyl)methyl ethers isomerize to 3-(2-methyl-3-furyl)- and 3-(2-methyl-3-thienyl)-2-hydroxy-5-methoxy-p-benzoquinones.This new synthetic method provides an efficient route to new hydroxybenzoquinones closelyrelated to natural compounds.Thus, dihydroardisiaquinone A is synthesized in 5 steps from p-methoxyphenol.

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