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--- chemical:start [2012/02/18 20:57] – mcmaster
+++ chemical:start [2013/10/20 14:59] (current) – external edit 127.0.0.1
@@ Line 32: / Line 32: @@
 Delayering: component of all wet etches
 Can be stored in polymethylpentene (PMP), polyethylene (PE), and Teflon (PTFE). [Isotropic Silicon Etching using HF/Nitric/Acetic Acid (HNA)]
-~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.
-===== Health =====
 HF is notably toxic
+See [[HF]] for more details
 ====== Isopropanol (Isopropyl alcohol (IPA)) ======
@@ Line 42: / Line 42: @@
 General cleaning
-====== Nitric acid (HNO3, 70%) ======
+====== Nitric acid (HNO3) ======
-Decapsulation: usually bare die, can be used for live but RFNA is preferred
+Decapsulation.  Info on making: [[chemical:hno3]]
-====== Nitric acid (HNO3, red fuming / RFNA) ======
-Live analysis decapsulation
 ====== Potassium dichromate (K2Cr2O7) ======
@@ Line 75: / Line 72: @@
+====== Safety======
+===== Hydrofluoric acid =====
+  * MSDS: http://msds.dupont.com/msds/pdfs/EN/PEN_09004a2f801b4efc.pdf
+  * Health: 4
+  * Flammability: 0
+  * Instability/reactivity: 2
+  * Other: corrosive
+WARNING: probably the most dangerous chemical you might encounter for this work. Suggest use of fully body protection including gloves, acid gas respirator, and frontal protection. Contact can include causing excruciating pain from dissolving bones, severe burns, cardiac arrest, and more. It may be useful to keep calcium gluconate (2.5% gel) handy to increase chance of survival in case of contact. Seek IMMEDIATE medical attention. It is unknown how over the counter HF from Whink rust remover compares to concentrate in terms of necessary safety precautions.
+{{gallery>image:HF_gas_mask.jpg}}
+===== Nitric acid =====
+  * MSDS: http://www.jtbaker.com/msds/englishhtml/n3660.htm
+  * Health: 4
+  * Flammability: 0
+  * Instability/reactivity: 0
+  * Other: oxidizer
+  * Causes severe burns.
+===== Sulphuric acid =====
+  * MSDS: http://www.jtbaker.com/msds/englishhtml/s8234.htm
+  * Health: 3
+  * Flammability: 0
+  * Instability/reactivity: 2
+  * Other: reactive to water
+  * Causes severe burns.
+===== Hydrogen peroxide =====
+  * MSDS: http://www.jtbaker.com/msds/englishhtml/h4065.htm
+  * Health: 3
+  * Flammability: 0
+  * Instability/reactivity: 2
+  * Other: oxidizer
+  * Strong oxidizer. Even low concentrations can be dangerous when mixed with certain chemicals.
+====== References ======
+  - http://en.wikipedia.org/wiki/Hydrofluoric_acid
+  - http://en.wikipedia.org/wiki/Nitric_acid
+  - http://en.wikipedia.org/wiki/Sulfuric_acid
+  - http://en.wikipedia.org/wiki/Hydrogen_peroxide