n-Butyl Acetate Storage & Tank Compatibility

Storing n-Butyl Acetate? Start Here

n-Butyl acetate (C₆H₁₂O₂) is a clear, colorless ester solvent with a sweet, fruity odor, widely used in lacquers, coatings, adhesives, printing inks, and as an extraction and process solvent. Its balanced evaporation rate and strong solvency for resins make it a workhorse in finishing operations. As a flammable liquid with a flash point near 72 F, it requires bonded, grounded, and vapor-controlled handling. From a containment standpoint, n-butyl acetate is an aggressive organic solvent: like other esters it swells and stress-cracks polyethylene and polypropylene over time. Reliable storage therefore relies on stainless steel or fluoropolymer-lined tanks rather than standard polyethylene or polypropylene vessels, and seals should be PTFE or PVDF rather than nitrile or EPDM. This page summarizes verified identity, hazard, and material-compatibility data, drawn from PubChem and CAMEO Chemicals, to guide safe tank and seal selection for this aggressive ester solvent.

Is n-Butyl Acetate Compatible with Polyethylene (HDPE / XLPE) Tanks?

No. n-Butyl acetate is an ester solvent, and esters are a known incompatibility class for polyethylene. Both HDPE and crosslinked polyethylene (XLPE) absorb the solvent, which causes swelling, softening, loss of mechanical strength, and environmental stress cracking over time. Even where short-term contact appears tolerable, long-term storage in polyethylene is not recommended and is rated Unsuitable (U) on standard chemical resistance charts. Polypropylene is likewise attacked. For bulk or long-term storage, use stainless steel (304 or 316) or fluoropolymer-lined steel. Seals and gaskets should be PTFE or PVDF; avoid EPDM and nitrile, which degrade rapidly in this solvent.

Material compatibility at a glance

Store n-butyl acetate in stainless steel (304/316) or fluoropolymer-lined vessels. Polyethylene (HDPE and XLPE) and polypropylene are not suitable because ester solvents swell and stress-crack these resins. Use PTFE or PVDF for seals and linings; avoid EPDM and nitrile elastomers.

Ratings: S suitable · C conditional / limited · U unsuitable. Verify against the cited resistance charts and your concentration/temperature before specifying.

The safety that actually matters

• Flammable liquid (NFPA flammability 3, flash point about 72 F): keep away from heat, sparks, open flame, and hot surfaces; no smoking.
• Bond and ground all containers and transfer equipment to prevent static-discharge ignition; vapors are heavier than air and can travel to an ignition source.
• Provide local exhaust ventilation; vapors may cause drowsiness, dizziness, and respiratory irritation (H336, H335-type effects).
• Wear chemical splash goggles and solvent-resistant gloves; the liquid causes serious eye irritation (H319).
• Store in a cool, well-ventilated area away from strong oxidizers, strong acids, and strong caustics; keep containers tightly closed.
• Harmful to aquatic life (H412): prevent releases to soil, drains, and waterways; have spill containment ready.

Common questions

Can I store n-butyl acetate in an HDPE or XLPE poly tank?

No. As an ester solvent it swells and stress-cracks polyethylene, so both HDPE and XLPE are rated Unsuitable. Use stainless steel or a fluoropolymer-lined tank instead.

What tank material is best for n-butyl acetate?

304 or 316 stainless steel is the standard choice. Fluoropolymer (PTFE/PVDF) linings are also fully resistant and are ideal for seals, gaskets, and tank linings.

Is n-butyl acetate flammable?

Yes. It has a closed-cup flash point near 72 F and an NFPA flammability rating of 3. Keep it away from ignition sources and use bonded, grounded, vapor-controlled handling.

What seal and gasket materials work with n-butyl acetate?

PTFE and PVDF are fully compatible. FKM (Viton) is usable but can swell, so verify the grade. EPDM and nitrile (Buna-N) degrade quickly and should not be used.