137538-91-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137538-91-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,5,3 and 8 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 137538-91:
(8*1)+(7*3)+(6*7)+(5*5)+(4*3)+(3*8)+(2*9)+(1*1)=151
151 % 10 = 1
So 137538-91-1 is a valid CAS Registry Number.
137538-91-1Relevant articles and documents
THE REACTION OF ω-THIOCYANATOACETOPHENONES WITH HYDRAZINES
Abdelrazek, F. M.,Kandeel, Z. E.
, p. 101 - 104 (2007/10/02)
w-Thiocyanatoacetophenones 1a,b react with hydrazine hydrate to yield bis3,4-thiazol-2-ylidine>azines 2a,b.Compounds 1a,b react with phenyl hydrazine to yield 1-phenyl-6-phenylazo-3,6-diaryl-1,4,5,6-tetrahydropyridazines 5a,b r
