The HDPE (High-Density Polyethylene) bottle inside your IBC tote is chemically resistant to a wide range of substances — but it's not invincible. Understanding HDPE's chemical compatibility is essential for safety, container longevity, and regulatory compliance.
What HDPE Handles Well
HDPE has excellent resistance to:
Aqueous solutions: Water, salt water, most water-based solutions. HDPE is essentially inert to water, which is why it's used for potable water storage.
Most acids: Hydrochloric acid (up to 37%), sulfuric acid (up to 70%), phosphoric acid, acetic acid (vinegar), citric acid. HDPE handles most acids at ambient temperature without degradation.
Most bases/alkalis: Sodium hydroxide (caustic soda) up to 50%, potassium hydroxide, ammonia solutions. HDPE is one of the best plastics for alkaline storage.
Alcohols: Methanol, ethanol, isopropanol, glycol. HDPE is resistant to most common alcohols, though prolonged exposure to some may cause slight swelling.
Detergents and soaps: All common detergent formulations are HDPE-compatible.
Food products: Cooking oils, syrups, fruit juices, dairy products, vinegar, honey. HDPE is FDA-approved for food contact.
Agricultural chemicals: Most water-based fertilizers, pesticides, and herbicides. Always verify specific product compatibility.
What HDPE Doesn't Handle Well
HDPE has limited resistance to:
Strong oxidizing acids: Concentrated nitric acid (above 50%), chromic acid, and concentrated sulfuric acid (above 70%) can attack HDPE, especially at elevated temperatures.
Aromatic hydrocarbons: Benzene, toluene, xylene, and similar aromatic solvents will swell and eventually dissolve HDPE. These should never be stored in IBC totes.
Chlorinated solvents: Methylene chloride, chloroform, carbon tetrachloride, and trichloroethylene are highly aggressive to HDPE.
Ketones (prolonged exposure): Acetone and MEK (methyl ethyl ketone) cause swelling and softening of HDPE with extended contact. Brief exposure is usually tolerable, but long-term storage is not recommended.
Essential oils and terpenes: Orange oil (d-limonene), turpentine, and other terpene-based solvents attack HDPE.
Strong oxidizers: Concentrated hydrogen peroxide (above 30%), sodium hypochlorite at high concentrations, and other powerful oxidizers can degrade HDPE over time.
Temperature Considerations
Chemical compatibility varies significantly with temperature. Many substances that HDPE handles well at room temperature become problematic at elevated temperatures. As a general rule:
Never store liquids above 150°F (66°C) in a standard IBC tote. The HDPE will soften, deform, and potentially fail catastrophically.
Compatibility Ratings Explained
Chemical compatibility charts typically use a rating system:
When in doubt, always check with the chemical manufacturer and the tote manufacturer. Material Safety Data Sheets (SDS) typically include packaging compatibility information.
What About Fuel and Petroleum?
This is a common question. Standard HDPE IBC totes should NOT be used for:
However, some IBC totes are specifically manufactured with fluorinated HDPE bottles that are resistant to fuels and petroleum products. These are specialty items and cost significantly more than standard totes. We don't commonly stock them, but can source them on request.
Waste oil, hydraulic fluid, and motor oil are generally compatible with HDPE for storage (not transport). However, the petroleum content means they should be kept in industrial-grade totes, never food-grade.
Practical Advice
1. Always check compatibility before filling. A $5 compatibility check prevents a $200 tote failure and a potential environmental or safety incident.
2. Don't mix chemicals in an IBC tote unless you're certain the reaction is safe and the resulting solution is HDPE-compatible.
3. Label every tote with its current contents. This protects the next person who handles the container and makes recycling/reconditioning possible.
4. When in doubt, ask. Our team at IBC Kentucky has handled thousands of different chemicals in IBC totes. We can often tell you from experience whether a specific product is suitable.