# Mystery Chemicals

**URL:** <https://boards.straightdope.com/t/mystery-chemicals/933378>\
**Category:** Factual Questions\
**Created:** [February 21, 2021, 5:20am UTC](https://boards.straightdope.com/t/mystery-chemicals/933378 "2021-02-21T05:20:05Z")\
**Posts on this page:** 1\
**Page:** 3

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**Author:** ![rbroome](https://avatars.discourse-cdn.com/v4/letter/r/838e76/32.png) [@rbroome](https://boards.straightdope.com/u/rbroome)\
**Post date:** [March 5, 2021, 5:13am UTC](https://boards.straightdope.com/t/mystery-chemicals/933378/42 "2021-03-05T05:13:49Z")

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Hydrofloric acid certainly has a bad reputation. But if in spite of that, you would like to buy some, it is for sale at Walmart. 🙂

[https://www.walmart.com/ip/Whink-Rust-Stain-Remover-10-Ounces/21798682](https://www.walmart.com/ip/Whink-Rust-Stain-Remover-10-Ounces/21798682)

[https://www.rustoleum.com/product-catalog/consumer-brands/whink/rust-stain-and-removers/rust-stain-remover](https://www.rustoleum.com/product-catalog/consumer-brands/whink/rust-stain-and-removers/rust-stain-remover)

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