129990-16-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 129990-16-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,9,9,9 and 0 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 129990-16:
(8*1)+(7*2)+(6*9)+(5*9)+(4*9)+(3*0)+(2*1)+(1*6)=165
165 % 10 = 5
So 129990-16-5 is a valid CAS Registry Number.
129990-16-5Relevant articles and documents
Sulfuric acid adsorbed on silica gel. An efficient catalyst for the tetrahydropyranylation of alcohols
Chavez,Godinez
, p. 159 - 164 (2007/10/02)
Sulfuric acid adsorbed on silica gel is an efficient catalyst for the tetrahydropyranylation of alcohols and phenols. The reaction takes 1 to 10 minutes to be completed and nearly quantitative yields are obtained. The method is remarkable simple and inexpensive.
