Hemiacidrin, also known as 2,5-dichloro-4-nitrophenol, is a chemical compound that was historically used as a herbicide and defoliant. It was primarily applied in agriculture to control broadleaf weeds and to strip leaves from plants, facilitating mechanical harvesting. However, due to its potential environmental and health risks, including toxicity to aquatic life and the possibility of groundwater contamination, its use has been restricted or banned in many countries. The compound's chemical structure consists of a phenol ring with two chlorine atoms at the 2nd and 5th positions and a nitro group at the 4th position, which contributes to its herbicidal properties.
The CAS Registry Mumber 8002-14-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 8,0,0 and 2 respectively; the second part has 2 digits, 1 and 4 respectively. Calculate Digit Verification of CAS Registry Number 8002-14: (6*8)+(5*0)+(4*0)+(3*2)+(2*1)+(1*4)=60 60 % 10 = 0 So 8002-14-0 is a valid CAS Registry Number.