α-N-Bis-(2-chloroethyl)-amino-acetanilide, also known as 2-chloro-N-(2-chloroethyl)-N-acetylaniline or simply "mustard gas," is a highly toxic chemical warfare agent. It is an oily, colorless, and odorless liquid at room temperature, with a strong, irritating smell. Mustard gas was first used during World War I and is known for its ability to cause severe skin burns, eye damage, and respiratory issues. It works by alkylating DNA and proteins, leading to cell death and tissue damage. The chemical is classified as a blister agent and has been banned under international law due to its devastating effects on human health and the environment.
The CAS Registry Mumber 57442-55-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,4,4 and 2 respectively; the second part has 2 digits, 5 and 5 respectively. Calculate Digit Verification of CAS Registry Number 57442-55: (7*5)+(6*7)+(5*4)+(4*4)+(3*2)+(2*5)+(1*5)=134 134 % 10 = 4 So 57442-55-4 is a valid CAS Registry Number.