Hemoglobins are a group of iron-containing proteins found in red blood cells that are responsible for transporting oxygen from the lungs to the body's tissues and returning carbon dioxide from the tissues back to the lungs. They are composed of four subunits, each containing a heme group with an iron atom, which binds to oxygen molecules. Sulf-hemoglobins, also known as methemoglobins, are a form of hemoglobin in which the iron atom is oxidized from its normal ferrous (Fe2+) state to the ferric (Fe3+) state. This oxidation impairs the hemoglobin's ability to bind and transport oxygen effectively, leading to a condition called methemoglobinemia. Sulf-hemoglobins can be caused by various factors, including genetic mutations, exposure to certain chemicals or drugs, and certain medical conditions. Treatment for methemoglobinemia may involve the administration of methylene blue or other reducing agents to convert the oxidized hemoglobin back to its functional form.
The CAS Registry Mumber 9010-20-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 9,0,1 and 0 respectively; the second part has 2 digits, 2 and 0 respectively. Calculate Digit Verification of CAS Registry Number 9010-20: (6*9)+(5*0)+(4*1)+(3*0)+(2*2)+(1*0)=62 62 % 10 = 2 So 9010-20-2 is a valid CAS Registry Number.