Question: what in downy fabric softener?
Answer: Ingredient.
SILICON COMPOUNDS. ... 
BIODEGRADABLE CATIONIC SOFTENING AGENTS. ... 
DIETHYLOXYESTER DIMETHYL AMMONIUM CHLORIDE (DEEDMAC) ... 
FORMIC ACID. ... 
PENTETIC ACID. ... 
BENZISOTHIAZOLINONE. ... 
OCTADECANOIC ACID, 1,1'-[(METHYLIMINO)DI-2,1-ETHANEDIYL] ESTER.