42498-58-8 Usage
General Description
2,3,5,6-tetrahydro-2-methylphthalic anhydride is a compound used in the production of various chemical products, such as resins, adhesives, and coatings. It is a cyclic anhydride, meaning it contains a cyclic group with two carbonyl groups attached to it. 2,3,5,6-tetrahydro-2-methylphthalic anhydride is known for its high reactivity and low melting point, making it suitable for a wide range of industrial applications. It is commonly used as a curing agent for epoxy resins, where it undergoes a reaction with the resin to form a crosslinked polymer network. Additionally, it is also used as a building block in the synthesis of various other chemical compounds. Overall, 2,3,5,6-tetrahydro-2-methylphthalic anhydride plays a crucial role in the production of many everyday products and industrial materials.
Check Digit Verification of cas no
The CAS Registry Mumber 42498-58-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,4,9 and 8 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 42498-58:
(7*4)+(6*2)+(5*4)+(4*9)+(3*8)+(2*5)+(1*8)=138
138 % 10 = 8
So 42498-58-8 is a valid CAS Registry Number.
42498-58-8Relevant articles and documents
Conformational Equilibrium in 8-Methyl-cis-2-thiahydrindane and 8-Methyl-cis-2-oxahydrindane by 13C NMR Spectroscopy
Willer, Rodney L.
, p. 261 - 265 (2007/10/02)
The preferred conformation of 8-methyl-cis-thiahydrindane has been both estimated by 13C NMR chemical shifts and determined by low temperature 13C NMR spectroscopy to be the conformer with the methyl group equatorial with respect to the cyclohexane ring.This result is in disagreement with the interpretation of the temperature dependence of the CD spectra of (+) and (-) 8-methyl-cis-2-thiahydrindane, whereby the conformation with the methyl group axial with respect to the cyclohexane ring was claimed to be the preferred conformation.The preferred conformation of the related oxygen heterocycle, 8-methyl-cis-2-oxahydrindane, has been estimated by 13C NMR chemical shifts to be the conformer with the methyl group axial with respect to the cyclohexane ring.Possible reasons for these observations are discussed.
