Historical clue formulations

• Synthetic dye compound — 2017-01-07
• Chemical used in dyes — 2013-02-23
• Oil used in making polyurethane — 2007-10-21
• Oily compound used in dyes — 2006-05-19
• Dyemaking material — 2006-02-19
• Kind of dye — 2005-07-24
• Dyemaking chemical — 2000-11-05
• Dye ingredient — 1997-03-24
• Kind of dye — 1995-06-02