The HDPE (high-density polyethylene) bottles used in composite IBC totes are prized for their exceptional chemical resistance. HDPE can safely contain a vast range of acids, bases, salts, and aqueous solutions without degradation. However, certain chemicals — particularly strong oxidizers, aromatic hydrocarbons, and chlorinated solvents — can attack HDPE, causing swelling, softening, stress cracking, or permeation. Understanding these compatibility limits is essential for safe and effective IBC use.
Excellent Compatibility (Safe for Long-Term Storage)
HDPE performs exceptionally well with most aqueous solutions, dilute acids, dilute bases, alcohols, and common industrial chemicals. These substances can be stored in HDPE IBCs for extended periods without any concern about container degradation.
- Water and water-based solutions
- Dilute sulfuric acid (up to 70%)
- Dilute hydrochloric acid (up to 35%)
- Sodium hydroxide (caustic soda) solutions
- Isopropyl alcohol and ethanol
- Detergents and cleaning solutions
- Vegetable oils and food-grade liquids
- Calcium chloride and sodium chloride solutions (brine)
- Acetic acid (vinegar) up to 50%
- Hydrogen peroxide up to 35%
Limited Compatibility (Use with Caution)
Some chemicals are compatible with HDPE at low concentrations or ambient temperatures but become problematic at higher concentrations or elevated temperatures. These substances require careful evaluation of your specific conditions before using an HDPE IBC.
- Concentrated nitric acid — compatible at low concentrations but attacks at over 50%
- Concentrated sulfuric acid over 70% — causes slow degradation at elevated temperatures
- Essential oils and fragrances — some terpene-based oils can cause stress cracking
- Bleach (sodium hypochlorite) — compatible at standard concentrations but degrades HDPE at very high concentrations over time
- Xylene — limited short-term compatibility only
Not Compatible (Do Not Use HDPE IBCs)
Certain chemicals will rapidly attack HDPE, causing the bottle to swell, soften, crack, or fail. Never store these substances in a standard HDPE IBC tote. Alternative container materials such as stainless steel, fluorinated HDPE, or specialty plastics are required.
- Benzene, toluene, and aromatic hydrocarbons
- Chlorinated solvents (methylene chloride, trichloroethylene)
- Concentrated nitric acid over 70%
- Fuming sulfuric acid (oleum)
- Bromine and fluorine
- Strong oxidizing agents at high concentrations
Temperature Effects on Compatibility
Chemical compatibility ratings are typically established at ambient temperature (around 68 degrees Fahrenheit or 20 degrees Celsius). At elevated temperatures, chemical reactions accelerate and HDPE becomes more susceptible to attack. As a general rule, reduce the compatibility rating by one level for every 20 degrees Fahrenheit above ambient. If a chemical is rated as having limited compatibility at ambient temperature, treat it as not compatible at elevated temperatures.
When in doubt about chemical compatibility, consult the chemical manufacturer's safety data sheet and the IBC manufacturer's compatibility chart. Grand Rapids IBC can also help you evaluate compatibility for specific products. Contact our team for guidance, or visit our resources page for downloadable compatibility reference materials.