E 221
Natriumsulfiet
Natriumsulfiet
Natriumwaterstofsulfiet
Zwaveldioxide
Methylester van p-hydroxybenzoëzuur
Methyl-p-hydroxybenzoaat, natriumzout.
Propyl-p-hydroxybenzoaat, natriumzout.
Propyl-p-hydroxybenzoaat
Ethyl-p-hydroxybenzoaat
Ethyl-p-hydroxybenzoaat, natriumzout.
Calciumbenzoaat