Perhaps. Allow me to give you the benefit of the doubt and ask you to explain how sodium fluoride as used by zee nazis has any bearing on its use today.
Please respond as it relates to your question "Do you know what else it's used for ?" and why I should be concerned.
The antique pictures in any discussion about flouride, have always came from the same source, and have NEVER been updated. LOL The foil hat folks keep blaming fluride on the end of the worlds economy, bad teeth, mental issues, and so on.