Advent International, the Sao Paulo, Brazil, private equity investor, agreed to acquire Viakem SA, the Mexican crop-protection-chemicals producer. Terms weren’t disclosed. In a statement, Advent said it’s invested in more than 30 chemicals companies worldwide over 25 years. Its recent investments in the sector include Allnex, GTM, Maxam, Mondo Minerals, Oxea and H.C. Starck. Galicia Abogados was legal adviser to Advent while Santos-Elizondo-Cantu-Rivera Gonzalez-de la Garza-Mendoza S.C. provided legal advice to Viakem.