Calcium Hydroxide (50%) (hydrated lime slurry, Ca(OH)2, CAS 1305-62-0) is a white, strongly alkaline suspension (pH about 12.4) with a specific gravity of about 1.38. Liquid lime is used for water softening and pH adjustment, acid wastewater neutralization, sludge stabilization, flue gas scrubbing and mining. Lime slurry settles quickly, so storage tanks need agitation or recirculation and large, low-placed outlets. Use the compatibility ratings to choose the right tank resin, fittings and gaskets.
Safety data: Liquid Calcium Hydroxide (Lime Slurry) Safety Data Sheet (SDS) – Mississippi Lime
HDPE is the most economical tank material for Calcium Hydroxide (50%), rated Excellent. Polypropylene, nylon and PVDF (Kynar®) are also rated Good or better. Rated Fair (contact us before use): aluminum hardware.
How Calcium Hydroxide (50%) works with the plastics used to make our storage tanks.
| Material | Rating |
|---|---|
| HDPE | |
| Polypropylene | |
| Nylon | |
| PVDF (Kynar®) |
How Calcium Hydroxide (50%) works with the plastics used for tank fittings.
| Material | Rating |
|---|---|
| HDPE | |
| PVC | |
| CPVC | |
| Polypropylene | |
| PVDF |
How Calcium Hydroxide (50%) works with gasket and O-ring materials.
| Material | Rating |
|---|---|
| Buna-N | |
| EPDM | |
| Viton® |
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