Trimethyl orthoacetate

Trimethyl orthoacetate (CAS 1445-45-0), also known as 1,1,1-trimethoxyethane and abbreviated as TMOA, is an orthoacid ester used as a reactive intermediate and protecting group reagent in organic synthesis.

Where is Trimethyl orthoacetate used?

• Flavor chemistry: precursor and acidulant component in controlled-release formulation work
• Pharmaceutical manufacturing: acetyl transfer agent and methoxylation reagent
• Selective protection of hydroxyl and carboxyl groups during multi-step API synthesis
• Flavor formulators use it to generate acetic acid esters under mild acidic conditions for food applications
• Controlled acidulant release in finished food and beverage applications
• Catalyst precursor in transesterification and condensation reactions where controlled hydrolysis is required
• Preservation-related formulations: gradual release of acetic acid derivatives
• This process extends active compound stability in the end product.

Commercial specifications

• Purity grades of 97–99% for synthesis applications
• Packaging from small laboratory quantities to bulk drum supply