Kroll’s Reagent, 500 mL

Kroll’s Reagent, 500 mL
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  • Item #: 172
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Price $70.23
8 or more $56.18 each

Kroll’s Reagent (AKA Kroll's etch) is the most popular metallographic etchant for etching titanium alloys. It reveals the structural details, and with certain Ti alloys will reveal grain boundaries. The primary alpha structure of titanium will appear white after etching. Alpha prime and acicular alpha structures will be outlined. Intergranular beta structure and beta grains will be darkened.

This product is made with ACS reagent grade hydrofluoric acid and nitric acid. The formula is listed in ASTM Standard E 407 as number 192 "Kroll’s".


User Instruction:

Warning! This product contains a small amount of HF (hydrofluoric acid). HF is a contact poison. Please wear protective gears. Seek medical attention immediately if it gets on the skin. HF will attack glasswares, please use a plastic container to transfer this liquid.

Mirror polish the sample with colloidal silica for 10+ minutes before etching. The surface finish of the sample needs to be at least 0.05 microns or finer. Swab the sample with this etchant for 3-10 seconds or immerse 10-30 seconds.


Nalgene® Leakproof Bottle, HDPE.


6-2-4-2 Titanium 

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