Active from the 1730s to 1760s, she succeeded Françoise Leclerc as the leading marchande de modes in Paris.
In her epoch, however, it was not unusual for married women to be called "Mademoiselle", as the title "Madame" denoted prestige.
She was the manager of the famous Paris fashion accessories shop Chande de modes, and came to the fore in 1734, when she began receiving orders from women of the nobility.
Charles Philippe d'Albert de Luynes noted that she traveled to Spain in 1739 with her client, the king's mistress Louise Julie de Mailly, in order to study how to dress Mailly for the up-coming French-Spanish Royal wedding.
She was the rival of Mademoiselle Alexandre, who had succeeded her as the leading fashion merchant of Paris by 1772, when Duchapt is referred to as a "former celebrity".