20091-45-6 Usage
General Description
Gold (~200~Au) is a chemical element with the symbol Au and atomic number 79. It is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Gold is highly valued for its beauty, rarity, and resistance to corrosion and has been used for various purposes, including jewelry, coinage, and as a standard for monetary exchange. In its purest form, gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. It is also used in electronics, medicine, and as a catalyst in chemical reactions. Gold is typically found in nature as nuggets or grains in rocks, and it can also be extracted from ores using various chemical processes.
Check Digit Verification of cas no
The CAS Registry Mumber 20091-45-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,0,9 and 1 respectively; the second part has 2 digits, 4 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 20091-45:
(7*2)+(6*0)+(5*0)+(4*9)+(3*1)+(2*4)+(1*5)=66
66 % 10 = 6
So 20091-45-6 is a valid CAS Registry Number.
