Infopirate.org

Every piece of clothing has the RN or WPL number on the annoying tag on the back. Sometimes this is the only identification of the manufacturer. Enter the number in the query and know for thyself.

https://rn.ftc.gov/pls/TextileRN/wrnquery$.startup 

Pilot Chemical is a global chemical company providing the household and industrial detergent, personal care, lubricant, oilfield, emulsion polymerization, textile, and agriculture industries with high-quality specialty chemicals. Pilot’s proprietary technologies involve alkylation, sulfonation, sulfation and a number of other specialty operations.

http://www.pilotchemical.com/