Nalco™ 2398

Colloidal Silica for Stock Removal on Silicon

Nalco 2398 is a colloidal silica polishing slurryspecifically designed to lower the residual metals levels on wafers after the stock polishing process. The chemical additive package specifically targets copper ions to prevent their transfer into the bulk of the wafer. Nalco 2398 produces silicon stock removal rates comparable to Nalco 2371, with similar roughness values.

Nalco™ 2398 Details

Base Material:

Colloidal Silica

Shelf Life:

12 Months


Standard packaging comes in two sizes: 5 gallon, and 55 gallon. Standard totes also come in two sizes: 264 gallon and 330 gallon. These totes are rigid, virgin, HDPE vessels in an aluminum cage overpack. The openings are six-inch buttress with a two-inch NPT bung with a bottom drain. They can accept dip tubes or other commercially available dispense systems.

Similar Products

Nalco™ 2360Nalco™ 2358Nalco™ 2371Nalco™ 2329
Base Material Colloidal SilicaColloidal SilicaColloidal SilicaColloidal Silica
Particle Size (um)
Solids Content50282840
Specific Gravity1.391.191.191.29
Category - Polishing Slurries

Handling Instructions

Storage tanks and distribution piping should be constructed of engineering plastic, such as polyethylene, polypropylene, or PTFE. Materials such as aluminum, copper, brass, and PVC should be avoided. Avoid leaving slurry containers open for extended periods of time. Leaving containers open may result in drying which can cause wafer scratching.


Storage outside of the recommended conditions may result in irreversible product degradation. Products can be stored up to the expiration date between the temperatures range of 0°C - 45°C (32°F - 113°F). Avoid prolonged exposure at temperatures at either extreme. In all cases the products should be allowed to return to a room temperature prior to use. All shipments include temperature indicators to monitor shipping conditions.


Dispose of in accordance with all applicable local regulations.

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