The slave ship Mercantil departed on a transatlantic slave-trading voyage that would carry enslaved Africans to Brazil.

Vessel: Mercantil; flag: Portugal / Brazil; rig: Ship. People recorded in connection with the voyage: Captain: Santos, Joaquim Ferreira dos; Investor: Santos, Joaquim Ferreira dos; Captain: Rodrigues, Francisco Manoel de. The voyage began at Rio de Janeiro on 28 November 1821. Principal recorded place where captives were acquired: Luanda (West Central Africa and St Helena). Principal recorded disembarkation place: Rio de Janeiro. Recorded duration of the captives' Atlantic crossing: 24 days. Estimated mortality during the crossing: 5.0%. Recorded outcome: Voyage completed as intended.