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--- chemical:start [2013/04/07 21:36] – mcmaster
+++ chemical:start [2013/10/20 14:59] (current) – external edit 127.0.0.1
@@ Line 35: / Line 35: @@
 HF is notably toxic
-===== Whink rust stain remover =====
+See [[HF]] for more details
-~2.5% HF solution can be found in Whink brand rust remover. Unfortunately, due to health concerns with HF, this product is not sold in the EU. You still might be able to order it from somewhere overseas (ie eBay) cheap enough.
-MSDS: http://www.wardrobesupplies.com/assets/products/4652/safety_sheets/Whink%20Rust%20Remover%2010062008.pdf?1323898750
-^ Chemical ^ CAS ^ Weight % ^
-| Water (H2O) | 7732-18-5 | 90 - 100 |
-| Hydrofluoric acid (HF)  | 7664-39-3 | 1.50 – 3.5 |
-| Denatonium Benzoate | 3734-33-6 | 0.01 – 0.10 |
-Denatonium Benzoate is a bitterant probably put in to make sure that nobody consumes the HF.
-===== RustGo =====
-MSDS: http://www.alwilson.com/products/rustgo/RustGo%20MSDS.pdf
-^ Chemical ^ CAS ^ Weight % ^
-| Hydrofluoric acid (HF) | 7664-39-3 | ~12% |
-| Ammonium bifluoride (NH4HF2) | 1341-49-7 | ~16% |
-| Water (H2O) | 7664-39-3 | Remainder |
-[[http://www51.honeywell.com/sm/hfacid/common/documents/HF_properties_and_graphs.pdf|This]] states that 12% HF freezes at about 5C or so.  Could the NH4HF2 be frozen out?  Its very soluble in water though at 63 g / 100 mL @ 20C.