3-Methylen-bicyclo[4.2.0]octen-(1,6), also known as 3-methylenebicyclo[4.2.0]octa-1,6-diene, is a bicyclic organic compound with a molecular formula of C9H12. It features a unique structure consisting of two fused cycloalkane rings, with one being a cyclobutane and the other a cyclohexane. The compound has a double bond between the 1st and 6th carbon atoms, and a methylidene group (CH2) attached to the 3rd carbon atom. This chemical is known for its aromatic properties and is often used as an intermediate in the synthesis of various organic compounds, including pharmaceuticals and fragrances. Due to its reactive nature, it is typically handled with care in controlled laboratory settings.
The CAS Registry Mumber 4696-21-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,6,9 and 6 respectively; the second part has 2 digits, 2 and 1 respectively. Calculate Digit Verification of CAS Registry Number 4696-21: (6*4)+(5*6)+(4*9)+(3*6)+(2*2)+(1*1)=113 113 % 10 = 3 So 4696-21-3 is a valid CAS Registry Number.