Murakami’s reagent (AKA Murakami’s etch) is an etchant for Cr, Mo, Re, Ta-Mo, W, V, tungsten carbide (WC) and other sintered carbides. It can also be used as a color etchant of stainless steels. This etchant is listed in ASTM standard E 407 as No. 98 Murakami’s. It has two parts and has to be mixed fresh before use. Made with ACS reagent grade chemicals.
Part A: potassium ferricyanide, 50 g
Part B: sodium hydroxide solution, 500 ml
- Please note that potassium ferricyanide (Part A) is not a hazardous chemical; however, if it is exposed to acids (e.g., hydrochloric acid), it can give off the extremely poisonous hydrogen cyanide gas!
- Use a fume hood and wear protective gear. The mixture is poisonous by ingestion as well as contact.
- Dissolve 10 g of part A in 100 ml of part B under a fume hood and use the mixture under the hood.
- Immerse or swab the sample few seconds to a minute. Follow with a water rinse, alcohol rinse, and dry.
- Use fresh.
Nalgene® Leakproof Bottles, HDPE.
|Dimensions||4.4 × 3.5 × 6.5 in|
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