Isooctane (2,2,4-trimethylpentane, C8H18, CAS 540-84-1) is a clear, highly flammable hydrocarbon with a specific gravity of about 0.69, a boiling point of 211°F (99°C) and a flash point near 10°F (-12°C). It defines 100 on the octane scale and is used as a high-octane gasoline blending component, reference fuel and laboratory solvent. Isooctane storage needs grounding, vapor control and fire protection. Use the compatibility ratings to choose the right tank resin, fittings and gaskets.
Polypropylene is the most economical tank material for Isooctane, rated Excellent. Nylon and PVDF (Kynar®) are also rated Good or better. Avoid EPDM gaskets. Rated Fair (contact us before use): HDPE tanks and HDPE fittings.
How Isooctane works with the plastics used to make our storage tanks.
| Material | Relative cost | Rating |
|---|---|---|
| HDPE $ | $$$$ | C Fair |
| Polypropylene $$ | $$$$ | A Excellent |
| Nylon $$$ | $$$$ | A Excellent |
| PVDF (Kynar®) $$$$ | $$$$ | B Good |
How Isooctane works with the plastics used for tank fittings.
| Material | Rating |
|---|---|
| HDPE | C Fair |
| PVC | B Good |
| CPVC | A Excellent |
| Polypropylene | A Excellent |
| PVDF | B Good |
How Isooctane works with gasket and O-ring materials.
| Material | Rating |
|---|---|
| Buna-N | A Excellent |
| EPDM | D Not Recommended |
| Viton® | B Good |
How Isooctane works with the metals used for fittings and bolts.
| Material | Rating |
|---|---|
| 316 Stainless Steel | A Excellent |
| Hastelloy | — No Data |
| Titanium | — No Data |
| Aluminum | A Excellent |
Storing this chemical in PVDF?
PVDF tanks from 25 to 5,000 gallons with fittings installed. Confirm concentration and temperature with us before you order.
Send the chemical, concentration, temperature and size. We’ll match the tank and fittings and send a quote.