CAS Registry Number

CAS 14470-28-1 — 4-Methoxytrityl chloride

4-Methoxytrityl chloride is a protective reagent widely used in organic synthesis, particularly for the 5′-OH group of nucleotides in DNA and RNA synthesis. It forms stable trityl ethers that enable selective deprotection during oligonucleotide assembly. This solid chemical has a CAS number of 14470-28-1, a molecular formula of C17H15ClO (corrected from C7H4ClNO3, as the accurate formula for 4-methoxytrityl chloride is C17H15ClO), and a molecular weight of 286.77 g/mol. It requires storage at temperatures below +4°C and carries no signal word for hazard classification. Molekula supplies 4-methoxytrityl chloride from research to bulk quantities with full documentation and ISO 9001:2015 traceability.