2-ethyl- is a prefix used in organic chemistry to denote the presence of an ethyl group (C2H5) attached to the second carbon atom in a molecule. This prefix is commonly found in various chemical compounds, such as 2-ethyl-1-hexanol, 2-ethyl-1,3-dioxolane, and 2-ethyl-1,3-dioxane. The presence of the 2-ethyl group can significantly influence the physical and chemical properties of the compound, such as boiling point, solubility, and reactivity. These 2-ethyl compounds are used in a wide range of applications, including pharmaceuticals, fragrances, and industrial chemicals.
The CAS Registry Mumber 4436-98-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,3 and 6 respectively; the second part has 2 digits, 9 and 8 respectively. Calculate Digit Verification of CAS Registry Number 4436-98: (6*4)+(5*4)+(4*3)+(3*6)+(2*9)+(1*8)=100 100 % 10 = 0 So 4436-98-0 is a valid CAS Registry Number.