Tetrakis-(2-hydroxy-aethyl)-ammonium-fluorid, also known as tetra(2-hydroxyethyl)ammonium fluoride or THAF, is a chemical compound with the formula C8H20FNO4. It is a colorless, water-soluble solid that is widely used as a catalyst in various chemical reactions, particularly in the deprotection of silyl ethers and the hydrolysis of esters. THAF is known for its mild reaction conditions and high selectivity, making it a valuable reagent in organic synthesis and pharmaceutical chemistry. It is also used in the preparation of certain pharmaceuticals and as a fluorinating agent. The compound is generally considered to be stable and non-toxic, but like any chemical, it should be handled with care and used in accordance with safety guidelines.
The CAS Registry Mumber 4328-05-6 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,3,2 and 8 respectively; the second part has 2 digits, 0 and 5 respectively. Calculate Digit Verification of CAS Registry Number 4328-05: (6*4)+(5*3)+(4*2)+(3*8)+(2*0)+(1*5)=76 76 % 10 = 6 So 4328-05-6 is a valid CAS Registry Number.