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5-Methylazulene is a naturally occurring organic compound belonging to the azulene family, characterized by a five-membered ring fused to a seven-membered ring. It is an aromatic hydrocarbon with the molecular formula C11H12, featuring a methyl group attached to the fifth carbon atom of the azulene structure. 5-methylazulene is known for its distinct blue color and is found in various essential oils, such as lavender and sage. 5-Methylazulene is used in the fragrance industry and as a precursor in the synthesis of other compounds. It is also of interest in organic chemistry due to its unique structure and potential applications in materials science.

1654-55-3

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1654-55-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1654-55-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,5 and 4 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1654-55:
(6*1)+(5*6)+(4*5)+(3*4)+(2*5)+(1*5)=83
83 % 10 = 3
So 1654-55-3 is a valid CAS Registry Number.

1654-55-3SDS

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 5-methyl-azulene

1.2 Other means of identification

Product number -
Other names 7-Methylazulen

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:1654-55-3 SDS

1654-55-3Downstream Products

1654-55-3Relevant academic research and scientific papers

N.M.R. Studies of Bond Order in Azulene, Biphenylene 1,6-Methanoannulene

Collins, Michael J.,Sternhell, Sever,Tansey, Charles W.

, p. 1541 - 1546 (2007/10/02)

The 4J coupling constants of methyl-substituted derivatives, probes of bond order, have been used to examine the ground-state ?-electron distributions in azulene (1), biphenylene (2) and 1,6-methanoannulene (3).The experimental data obtained are in good agreement with theoretical predictions for biphenylene (2) and provide some evidence for ?-electron disproportionation towards the five-membered ring in azulane (1).The bond orders in 1,6-methanoannulene (3) obtained in this work are at variance with those predicted on the grounds of bond lenghts.

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