Polypropylene Chemical Compatibility

Key chemicals that have EXCELLENT chemical compatibility with Polypropylene are Sodium Hydroxide (Caustic Soda), Acetone, Hydrofluosilicic Acid, Sulfur Dioxide, Diesel Fuel, Motor Oil, Sodium Bisulfite, Malic Acid and others. These chemicals are not as chemically compatible with HDPE. Our Polypropylene Storage Tanks are available in single wall and double wall variations.

Chemical	POLYPROPYLENE	Chemical Information	Specific Gravity	Chemical Name
BLEACH	GOOD	Bleach (20% or less Sodium Hypochlorite) is a very common storage application. It is harmed by UV rays and by heat. The use of a light or white colored tank with opaque walls is recommended. PVC Fittings are good while PVDF fittings are more expensive but excellent. Viton gaskets are excellent.	1.2	BLEACH (20% SODIUM HYPOCHLORITE)
SODIUM HYPOCHLORITE (100%)	GOOD	Sodium Hypochlorite is a very common storage application. It is harmed by UV rays and by heat. The use of a light or white colored tank with opaque walls is recommended. PVC Fittings are good while PVDF fittings are more expensive but excellent. Viton gaskets are excellent.	1.2	SODIUM-HYPOCHLORITE-100
DIESEL EXHAUST FLUID (DEF)	EXCELLENT	Diesel Exhaust Fluid is a dilute urea solution made with 32.5% urea and 67.5% deionized water. It is used in modern diesel engines to reduce nitrogen oxides that are produced during combustion. DEF is a clear, colorless solution that should be stored in a cool, dry place out of direct sunlight. Diesel Exhaust Fluid will freeze at approximately 12 degrees F. It weighs about 9 pounds per gallon. Heat will shorten the shelf life of DEF.	1.09	DIESEL-EXHAUST-FLUID-DEF
ETHYLENE GLYCOL	EXCELLENT	Ethylene glycol is a clear, colorless syrupy liquid. The primary hazard is the threat to the environment. Immediate steps should be taken to limit its spread to the environment. Since it is a liquid it can easily penetrate the soil and contaminate groundwater and nearby streams. Ethylene glycol is the most important glycol commercially available and is manufactured on a large scale in the United States. It is used as an antifreeze and coolant, in hydraulic fluids, and in the manufacture of low-freezing dynamites and resins. It has a specific gravity of 1.1.	1.125	ETHYLENE-GLYCOL
PHOSPHORIC ACID (>40%)	EXCELLENT	Phosphoric Acid is used for fertilizer and also in the food industry (oil, beverages, cheese, canned food, yeast, sugar, water) and other industries (pharmacy, detergents, animal feed, metal treatment, textile, pigments…)	1.3	PHOSPHORIC-ACID-GT40
SODIUM HYDROXIDE (50%)	EXCELLENT	Sodium Hydroxide info	1.53	SODIUM-HYDROXIDE-50
SULFURIC ACID 75% to 93%	FAIR	Sulfuric Acid (H2SO4) is a very corrosive, very dense, oily liquid. It can range from colorless to dark brown depending on its purity and used in the manufacture a huge variety of substances including chemicals, fertilizers, paints, detergents, and explosives. Sulfuric Acid is also referred to as oil of vitriol and vitriol.	1.84	SULFURIC-ACID-75TO93
SULFURIC ACID 10% to 75%	EXCELLENT	Sulfuric Acid (H2SO4) is a very corrosive, very dense, oily liquid. It can range from colorless to dark brown depending on its purity and used in the manufacture a huge variety of substances including chemicals, fertilizers, paints, detergents, and explosives. Sulfuric Acid is also referred to as oil of vitriol and vitriol.	1.67	SULFURIC-ACID-10TO75
SULFURIC ACID 1% to 10%	EXCELLENT	Sulfuric Acid (H2SO4) is a very corrosive, very dense, oily liquid. It can range from colorless to dark brown depending on its purity and used in the manufacture a huge variety of substances including chemicals, fertilizers, paints, detergents, and explosives. Sulfuric Acid is also referred to as oil of vitriol and vitriol. In low concentrations, HDPE is a very good choice for storage tank material.	1.07	SULFURIC-ACID-1TO10
ACETIC ACID	GOOD	Acetic acid, glacial is a clear colorless liquid with a strong odor of vinegar. Flash point 104 F. Density 8.8 lb / gal. Corrosive to metals and tissue. Used to make other chemicals, as a food additive, and in petroleum production. It has a specific gravity of 1.05.	1.055	ACETIC-ACID
ACETONE	EXCELLENT	Acetone, also known as propanone, is a colourless liquid with a distinctive taste and fruity odour. It is manufactured in large quantities to produce a variety of products including nail polish and varnish removers, plastics, paint, adhesives and inks, and used to make other chemicals such as acetylene. Low levels of acetone are present naturally in the human body, plants, trees and volcanic gases.	.792	ACETONE
AMYL ALCOHOL	GOOD	AMYL ALCOHOL INFO	.815	AMYL-ALCOHOL
BENZYL ALCOHOL	EXCELLENT	BENZYL ALCOHOL INFO	1.044	BENZYL-ALCOHOL
BUTYL ALCOHOL	EXCELLENT	Butanol, a 4-carbon alcohol (butyl alcohol), is generally used as an industrial solvent in products such as lacquers and enamels. However, it can also be blended with gasoline and used as a transportation fuel. Butanol is commonly produced using fossil fuels, but it can also be produced from biomass, in which case it is called biobutanol. Biobutanol is produced from the same feedstocks as ethanol—corn, sugar beets, and other types of biomass. Biobutanol is considered a renewable fuel and qualifies under the Renewable Fuel Standard; the category it falls under depends on the feedstock used to produce it. Butyl Alcohol has a specific gravity of .81.	.81	BUTYL-ALCOHOL
SODIUM HYPOCHLORITE (<20%)	EXCELLENT	Sodium Hypochlorite is a very common storage application. It is harmed by UV rays and by heat. The use of a light or white colored tank with opaque walls is recommended. PVC Fittings are good while PVDF fittings are more expensive but excellent. Viton gaskets are excellent.	1.2	SODIUM-HYPOCHLORITE-LT20
SODIUM HYDROXIDE (80%)	EXCELLENT	Sodium Hydroxide info	1.9	SODIUM-HYDROXIDE-80
CAUSTIC SODA (80%)	EXCELLENT	CAUSTIC SODA IS Sodium Hydroxide info	1.56	CAUSTIC-SODA-80
CAUSTIC SODA (50%)	EXCELLENT	CAUSTIC SODA IS Sodium Hydroxide info	1.52	CAUSTIC-SODA-50
FERRIC CHLORIDE	EXCELLENT	Ferric Chloride (FECL3)is a brown, acidic, and corrosive solution when it is dissolved in water. It is used in sewage treatment and drinking water production. It is also used to etch copper and copper based metals. Do not mix dry Ferric Chloride with water in plastic tanks. It causes an exothermic reaction that can give off enough heat to cause tank failure. Ferric Chloride is also known as IRON(III) OXIDE and IRON TRICHLORIDE.	1.45	FERROUS-CHLORIDE-AQUEOUS-60
HYDROCHLORIC ACID 37%	FAIR	Hydrochloric acid is an aqueous solution of hydrogen chloride gas. Hydrochloric acid is an important and widely used chemical. The largest end uses for hydrochloric acid are steel pickling, oil well acidizing, food manufacturing, producing calcium chloride, and ore processing. Hydrochloric Acid is very toxic and extremely corrosive. In concentrations above 20%, consider a bolted, sealed manway to keep fumes from escaping. The use of a fume scrubber should be seriously considered.	1.19	HYDROCHLORIC-ACID-37
MURIATIC ACID 37%	FAIR	Muriatic acid is another name for Hydrochloric acid. Muriatic Acid is an aqueous solution of hydrogen chloride gas. Hydrochloric acid is an important and widely used chemical. The largest end uses for hydrochloric acid are steel pickling, oil well acidizing, food manufacturing, producing calcium chloride, and ore processing. Hydrochloric Acid is very toxic and extremely corrosive. In concentrations above 20%, consider a bolted, sealed manway to keep fumes from escaping. The use of a fume scrubber should be seriously considered.	1.18	MURIATIC-ACID-37
HYDROFLUORIC ACID (HF) 49%	EXCELLENT	49% HYDROFLUORIC ACID is a clear, colorless, corrosive fuming liquid with a sharp, pungent odor. It is 100% soluble in water and is not flammable. The 49% solution is highly hazardous and needs to be handled and used with rigorous safety precautions. Both liquid and vapor can cause severe burns to all parts of the body. Specialized medical treatment is required for any exposure to this or any grade of HF. The specific gravity at 60F. is 1.175. Hydrofluoric acid fumes at low temperatures. best practices would be to have a bolted, sealed manway and to vent into a scrubber.	1.16	HYDROFLUORIC-ACID-49
HYDROFLUORIC ACID (HF) 70%	FAIR	70% HYDROFLUORIC ACID is a clear, colorless, corrosive fuming liquid with a sharp, pungent odor. It is 100% soluble in water and is not flammable. The 70% solution is highly hazardous and needs to be handled and used with rigorous safety precautions. Both liquid and vapor can cause severe burns to all parts of the body. Specialized medical treatment is required for any exposure to this or any grade of HF. The specific gravity at 70F. is 1.225. Hydrofluoric acid fumes at low temperatures. best practices would be to have a bolted, sealed manway and to vent into a scrubber.	1.23	HYDROFLUORIC-ACID-70
HYDROGEN PEROXIDE H2O2 (50%)	GOOD	Hydrogen peroxide is a deodorizing and bleaching agent. Its uses include organic and inorganic chemical processing, textile and pulp bleaching, metal treating, cosmetic applications, catalysis of polymerization reactions, municipal odor control, industrial waste treatment, and control of bulking in wastewaters.	1.2	HYDROGEN-PEROXIDE-50
HYDROGEN PEROXIDE H2O2 (30%)	GOOD	Hydrogen peroxide is a deodorizing and bleaching agent. Its uses include organic and inorganic chemical processing, textile and pulp bleaching, metal treating, cosmetic applications, catalysis of polymerization reactions, municipal odor control, industrial waste treatment, and control of bulking in wastewaters.	1.11	HYDROGEN-PEROXIDE-30
WINES	EXCELLENT		1	WINES
HYDROFLUOSILICIC ACID (20%)	EXCELLENT	Hydrofluorosilicic Acid, also known as FSA or HFS, is a transparent, colorless, aqueous solution that is used in a variety of applications. One of its most common uses is in the fluoridation of water. FSA is produced during the concentration of phosphoric acid in an evaporation process unique to the phosphate industry.	1.25	HYDROFLUOSILICIC-ACID-20
HYDROFLUOSILICIC ACID (100%)	EXCELLENT	Hydrofluorosilicic Acid, also known as FSA or HFS, is a transparent, colorless, aqueous solution that is used in a variety of applications. One of its most common uses is in the fluoridation of water. FSA is produced during the concentration of phosphoric acid in an evaporation process unique to the phosphate industry.	1.8	HYDROFLUOSILICIC-ACID-100
ANTIFREEZE (GLYCOL BASED)	EXCELLENT		1.145	ANTIFREEZE-GLYCOL-BASED
CALCIUM HYDROXIDE (50%)	EXCELLENT		1.38	CALCIUM-HYDROXIDE-50
CARBOLIC ACID (PHENOL)	GOOD		.959	CARBOLIC-ACID-PHENOL
ZINC SULFATE	EXCELLENT		1.18	ZINC-SULFATE
CARBONIC ACID	EXCELLENT		1	CARBONIC-ACID
FERROUS SULFATE (20%)	EXCELLENT		1.2	FERROUS-SULFATE-20
ISOOCTANE	EXCELLENT	ISOOCTANE INFO	.69	ISOOCTANE
NITRIC ACID (50%)	GOOD	NITRIC ACID (50%) INFO	1.36	NITRIC-ACID-50
NITRIC ACID (20%)	EXCELLENT	NITRIC ACID (20%) INFO	1.115	NITRIC-ACID-20
NITROUS ACID	EXCELLENT	NITROUS ACID INFO	1.0	NITROUS-ACID
SALT BRINE (NaCl SATURATED)	EXCELLENT	SALT BRINE (NaCl SATURATED) INFO	1.2	SALT-BRINE-SATURATED-NACL
TANNIC ACID	EXCELLENT	TANNIC ACID INFO	.3	TANNIC-ACID
TOLUENE	FAIR	TOLUENE INFO	.865	TOLUENE
UREA	EXCELLENT	UREA INFO	1.33	UREA
URIC ACID	N/A	URIC ACID INFO	1.1	URIC-ACID
ZINC CHLORIDE	EXCELLENT	ZINC CHLORIDE INFO	2.9	ZINC-CHLORIDE
WATER, DEIONIZED	EXCELLENT	DEIONIZED WATER INFO	1	WATER-DEIONIZED
TRIETHYLAMINE	SEVERE EFFECT	TRIETHYLLAMINE INFO	.73	TRIETHYLAMINE
SULFUR DIOXIDE	EXCELLENT	SULFUR DIOXIDE INFO	2.6	SULFUR-DIOXIDE
SULFUR CHLORIDE	FAIR	SULFUR CHLORIDE INFO	1.62	SULFUR-CHLORIDE
POTASSIUM HYPOCHLORITE	N/A	POTASSIUM HYPOCHLORITE INFO	1.16	POTASSIUM-HYPOCHLORITE
MINERAL OIL	EXCELLENT	MINERAL OIL INFO	.92	MINERAL-OIL

What are the benefits of using Rotationally Molded Polypropylene Storage Tanks?

Rotationally molded polypropylene tanks offer exceptional durability thanks to their seamless, stress‑free construction. Because the molding process forms the tank as a single piece, there are no welded joints or weak points that can fail over time. Polypropylene itself is naturally resistant to cracking, impact, and environmental stress, making these tanks ideal for long‑term use in demanding industrial, agricultural, and commercial settings.

Another major benefit is the outstanding chemical resistance of polypropylene. These tanks can safely store a wide range of corrosive chemicals, acids, and process materials without degrading or leaching. The material’s stability at elevated temperatures also makes it suitable for applications where other plastics might warp or break down. This reliability reduces maintenance needs and extends the service life of the tank, offering excellent value over time.

Rotational molding also allows for remarkable design flexibility. Manufacturers can create tanks in a wide variety of shapes, sizes, and configurations, including custom fittings, reinforced areas, and integrated features. This adaptability ensures that each tank can be tailored to the specific requirements of the application, whether it’s for chemical processing, water treatment, or bulk material storage. The result is a highly functional, cost‑effective solution that performs consistently in real‑world conditions.