The Chem-Tainer 50-gallon vertical double-wall chemical storage tank (SKU TC2738DC) seats a 50-gallon primary tank inside an integral secondary containment shell, so a leak in the inner wall is caught by the outer tank instead of reaching your floor. It stands 38 inches tall on a 27 x 27-inch footprint, molded in natural white polyethylene rated to a 1.9 specific gravity. That 1.9 rating is the headline spec: at 1.9 SG this is the top chemical rating offered in this size, with no heavier-duty 50-gallon vertical above it, which is exactly why buyers shopping a 50 gallon double wall tank for chemical service look here instead of at a single-wall vertical storage tank.
Will it work for your job?
Sizing is where most mistakes happen, so work from real weights. Filled with water this 50-gallon tank carries about 417 lb. Its 1.9 SG rating means the tank structure is engineered to carry up to roughly 792 lb of rated contents at full volume, giving you margin for liquids well above water weight. Because there is no higher-SG option in this size, confirm your chemical's specific gravity falls at or under 1.9 rather than shopping up. Lay out the floor for the 27 x 27-inch footprint plus clearance for fill and discharge plumbing. The Tank Sizing Calculator and Tank Sizing Guide help you match volume and contents weight to the right footprint. For level monitoring on a closed double-wall tank, our guide to level gauge selection for chemical service walks through radar, ultrasonic, hydrostatic, and magnetostrictive options.
Chemical compatibility
This tank is polyethylene rated to a 1.9 specific gravity. Its resin is recorded as HDLPE but not fully confirmed, and the practical impact is solvent and oxidizer behavior — so for sodium hypochlorite, hydrogen peroxide, peracetic acid, and hydrofluoric acid specifically, confirm HDLPE versus XLPE (cross-linked) resin grade with us before committing the tank. Two material rules carry most of the field mistakes here: gasket choice tracks the chemistry — EPDM for salts, bases, and glycols; Viton for oxidizers and strong acids; Aflas for peracetic acid — and DEF in particular needs 316SS fittings (not PVC) with EPDM gaskets to protect fluid purity. The following chemicals are listed as compatible with this Chem-Tainer tank, with the OEM-recommended fitting and gasket materials at the noted concentrations:
- Acetic Acid — 60%, PP/PVC fittings, EPDM gasket
- Aluminum Sulfate — 50%, PVC fittings, EPDM gasket
- Calcium Chloride — 40%, PVC fittings, EPDM gasket
- DEF — 32.5%, 316SS fittings, EPDM gasket
- Ethylene Glycol — 100%, PVC fittings, EPDM gasket
- Ferric Chloride — 50%, PVC fittings, EPDM gasket
- Ferric Sulfate — 60%, PVC fittings, EPDM gasket
- Ferrous Sulfate — 20%, PVC fittings, EPDM gasket
- Hydrochloric Acid — 37%, PVC fittings, Viton gasket
- Hydrofluoric Acid — 48%, PP/PVC fittings, Viton gasket
- Hydrofluosilicic Acid — 26%, PP/PVC fittings, Viton gasket
- Hydrogen Peroxide — 50%, PVC fittings, Viton gasket
- Magnesium Chloride — 30%, PVC fittings, EPDM gasket
- Peracetic Acid — 30%, 316SS fittings, Aflas gasket
- Phosphoric Acid — 85%, PVC fittings, Viton gasket
- Polyaluminum Chloride — PVC fittings, EPDM gasket
- Potassium Carbonate — 50%, PVC fittings, EPDM gasket
- Potassium Hydroxide — saturated, PVC fittings, EPDM gasket
- Propylene Glycol — PP/316SS fittings, EPDM gasket
- Sodium Bisulfate — PVC/PP fittings, EPDM gasket
- Sodium Bisulfite — PVC/PP fittings, EPDM gasket
- Sodium Carbonate — 30%, PVC fittings, EPDM gasket
- Sodium Hypochlorite — under 16.5%, PVC fittings, Viton gasket
- Sodium Thiosulfate — 40%, PVC fittings, EPDM gasket
- Sulfuric Acid — 98%, CPVC fittings, Viton gasket
- Urea Solution — 50%, PP/PVC fittings, EPDM gasket
- Zinc Orthophosphate — PP/316SS fittings, EPDM gasket
- Ozonated Water — up to 10 PPM, PVC fittings, EPDM gasket
These are starting points from the OEM chemical-resistance chart, which is concentration- and temperature-specific. Always confirm your exact concentration and operating temperature against the chart, and browse our full Chemical Compatibility Database before final selection. If your application is double-wall containment for spill compliance, confirm the secondary shell's containment volume against your 110% SPCC requirement before specifying — call 866-418-1777 for the outer-tank capacity. Our walkthrough of double-wall tanks for SPCC 40 CFR 112 compliance and our piece on spillover redundancy engineering cover the alarm and cutoff architecture that surrounds a containment tank.
Freight and ordering
This tank ships LTL freight from the Chem-Tainer plant in Marked Tree, Arkansas, with the rate quoted live to your ZIP code. Get an exact number on the Freight Cost Estimator, or call 866-418-1777 to talk through fitting placement, resin confirmation, and the right gasket package for your chemistry before you order. See the technical drawing on this page for fitting and dimensional detail.
