Ammonium Thiosulfate Storage — HDPE ATS Liquid Fertilizer Tank Guide
Storing Ammonium Thiosulfate (ATS)? Start Here
ATS (12-0-0-26S) is the liquid sulfur fertilizer for row crops. A poly tank stores it well, and there are three simple rules that keep it trouble-free: keep it cool, keep it away from acid, and keep copper out.
Can you store it in a poly tank? Yes.
ATS is compatible with HDPE/XLPE (1.5+ SG), PVC, and FRP — the three rules:
- Keep it below ~120°F (shade/partial shelter; aim for under 95°F) — heat decomposes it.
- Segregate from strong acids — acid contact releases toxic hydrogen sulfide (H₂S) gas.
- No copper or brass on wetted parts.
EPDM gaskets (Viton also fine).
The safety that actually matters
- Never mix with acid — H₂S release is the real danger; keep acids well clear.
- Keep it cool and shaded to prevent decomposition; no copper.
Common questions
- Poly OK for ATS?
- Yes — HDPE/XLPE, EPDM gaskets. Keep it cool, away from acid, and copper-free.
- Why keep it away from acid?
- Acid contact releases toxic hydrogen sulfide gas. Segregate storage and fill points.
Ammonium Thiosulfate storage tanks from OneSource
For ammonium thiosulfate storage, specify HDPE rated to specific gravity 1.9. Verified, compatibility-matched options:
- Snyder Industries 22 Gallon ASTM XLPE Black Heavy Duty Vertical Storage Tank (1.9 SG)
- Snyder Industries 150 Gallon XLPE Chemical Feed Station Tank (1.9 SG)
- Snyder Industries 500 Gallon ASTM XLPE Black Double Wall Tank (1.9 SG)
- Snyder Industries 1500 Gallon 45 Degree XLPE Cone Bottom Tank in White (1.9 SG)
- Snyder Industries 5000 Gallon XLPE Vertical Liquid Storage Tank with ASTM Certification (1.9 SG)
Confirm chemical compatibility and a ZIP freight quote with our team at 866-418-1777.
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Sources & References
All compatibility ratings, hazard classifications, and chemical identifiers on this page are sourced from authoritative third-party publications. Verify against the original references before final specification.
- PubChem Compound Database — entry for Ammonium Thiosulfate (CID 6096946, CAS 7783-18-8). pubchem.ncbi.nlm.nih.gov. National Library of Medicine / NCBI. Canonical chemical-identity reference.
- Snyder Industries Chemical Resistance Recommendations — system-of-construction guidance for polyethylene chemical-storage tanks at industrial ASTM 1.9 SG design rating. SNY-3041 Chemical Resistance Chart. Snyder Industries, current edition. Resin + fitting + gasket + bolt MOC matrix.
- Equistar Technical Tip — Chemical Resistance of Polyethylene — LDPE / MDPE / HDPE rating chart by concentration and temperature, distributed by Enduraplas. enduraplas.com (PDF). Equistar polyethylene resin chemical-resistance data, distributed via Enduraplas.
- NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response. nfpa.org. NFPA 704 'fire diamond' health/flammability/instability/special-hazard rating system (0–4 scale).
- UN Globally Harmonized System of Classification and Labelling of Chemicals (GHS), current revision. unece.org/transport/ghs. GHS pictograms, signal words, and H-statement codes referenced in this guide.
- ASTM D1998 — Standard Specification for Polyethylene Upright Storage Tanks, current edition. astm.org. Cited as the design-specific-gravity standard (typically 1.9 SG) for industrial chemical-service polyethylene tanks.
- NIOSH Pocket Guide to Chemical Hazards — occupational exposure limits, PPE, and IDLH data for Ammonium Thiosulfate. cdc.gov/niosh/npg. CDC / NIOSH chemical-specific occupational-safety reference.