Tetramethylammonium hydrogen difluoride, also known as TMAH, is an organic compound with the chemical formula (CH3)4NHF2. It is a colorless, hygroscopic, and highly soluble solid that is widely used in various applications, including peptide synthesis, DNA sequencing, and as a catalyst in organic reactions. TMAH is known for its ability to act as a strong base and a nucleophile, making it a versatile reagent in the field of chemistry. It is also used as a cleaning agent in the semiconductor industry due to its ability to remove organic contaminants without causing damage to the underlying materials. The compound is typically handled with care due to its corrosive nature and potential health risks.
The CAS Registry Mumber 1643-35-2 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,4 and 3 respectively; the second part has 2 digits, 3 and 5 respectively. Calculate Digit Verification of CAS Registry Number 1643-35: (6*1)+(5*6)+(4*4)+(3*3)+(2*3)+(1*5)=72 72 % 10 = 2 So 1643-35-2 is a valid CAS Registry Number.