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Check Digit Verification of cas no

The CAS Registry Mumber 2045-78-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,0,4 and 5 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 2045-78:
(6*2)+(5*0)+(4*4)+(3*5)+(2*7)+(1*8)=65
65 % 10 = 5
So 2045-78-5 is a valid CAS Registry Number.

2045-78-5SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 11, 2017

Revision Date: Aug 11, 2017

1.Identification

1.1 GHS Product identifier

Product name	1,3-dimethylidenecyclobutane

1.2 Other means of identification

Product number	-
Other names	1,3-Dimethylen-cyclobutan

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:2045-78-5 SDS

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2045-78-5Relevant articles and documents

The thermal transformations of bicyclopropylidene and methylenespiropentane revisited

Schill, Heiko,Kozhushkov, Sergei I.,Walsh, Robin,De Meijere, Armin

, p. 1510 - 1516 (2008/09/19)

The overall and the individual rate constants of the unimolecular thermal isomerization of methylenespiropentane (4) to 1,2- and 1,3- dimethylenecyclobutanes (7 and 8) have been determined to be lg(k _4/s_1) = (13.78 ± 0.06) - (49.7 ± 0.2) kcalmol-1/RT·ln10, lg(k7/s-1) = (13.03 ± 0.19) - (48.0 ± 0.6) kcalmo-1/RT·ln10 and lg(k8/s-1) = (14.15 ± 0.19) - (52.4 ± 0.5) kcalmol-1/RT-ln 10, respectively. The activation energies are significantly lower than that for the rearrangement of the parent spiropentane. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.

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CAS

2045-78-5