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Introduction: Isooctane (2,2,4-trimethylpentane, CAS 540-84-1) is the reference compound that defines Research Octane Number 100, and blending engineers select it for high-octane and aviation gasoline programs because of that fixed rating identity combined with ≥99.5% purity and low sulfur and low olefin content.
High-octane gasoline and aviation gasoline blending programs depend on a consistent antiknock component. Isooctane (2,2,4-trimethylpentane, CAS 540-84-1) provides a fixed reference point: it defines Research Octane Number 100 and is supplied at ≥99.5% purity in industrial and analytical grades. Consistency matters most when a recipe is built around a target rating. If the antiknock component shifts from batch to batch, the formulation team must adjust the blend and recheck the finished fuel. Procurement starts with the reference role, then narrows to grade and purity, and finally locks in the bulk conditions for a 20-foot container.
Octane ratings describe how a fuel resists autoignition under compression in a spark-ignition engine. If the fuel-air charge ignites before the spark plug fires, the pressure wave collides with the flame front and produces engine knock. The octane scale ranks fuels by that resistance using two reference fuels: n-heptane, which has a Research Octane Number of 0, and isooctane, which is assigned RON 100 by definition. A test fuel that behaves like a mixture of 90% isooctane and 10% n-heptane is rated RON 90. This is why isooctane is used in CFR engine testing and calibration laboratories: it defines the top of the scale. In a blending program, a component with a fixed RON identity gives formulators a stable reference when building a recipe around a target rating. Its value comes from that fixed identity as a reference standard and blend component. Isooctane is a saturated branched alkane, C8H18, with a boiling point of 99.2 °C and a vapor pressure of 53.3 kPa. It carries low sulfur and low olefins, which helps when a blend must satisfy a finished-fuel specification rather than only hit a knock-engine number. Its flash point of -12 °C also confirms that it is a flammable liquid from the moment it leaves the drum, so storage, transfer, and shipping follow hazardous-goods rules in each destination market.
Grade selection shapes how a batch performs in a program. The two available grades, industrial and analytical, serve different jobs inside a refinery or fuel laboratory.
Aviation gasoline is a different case. Its specification varies by market and grade, so the current local requirement must be checked against the proposed component before locking a program. The same isooctane that suits a 98 RON motor gasoline blend may fit an avgas recipe only where the market’s rule set allows it. That review belongs at the start of procurement, before the container is booked.
Once grade and specification are settled, the order structure protects the production schedule. Isooctane is a flammable liquid and moves in bulk containers. The minimum order quantity is one 20-foot container, or 1x20'FCL, and every commercial term downstream—packaging, payment, and lead time—is built around that unit. Packaging is where blending programs differ most. Steel drums and plastic drums suit sites that draw down in smaller volumes and want flexible on-site handling. IBC tanks fit plants with a daily feed rate that justifies a returnable intermediate container. Flexitanks and ISO tanks serve larger programs that want to discharge directly into tankage with the least handling. The right choice depends on receiving infrastructure, storage capacity, and how quickly a full container is consumed. Payment and delivery timing are the other half of planning. Orders are settled by T/T or L/C, and the production clock starts after the deposit clears or the original L/C arrives. From that point, standard lead time is 14 working days. That window works for a program with rolling consumption, provided the purchase order and letter of credit are not sitting in an inbox for two weeks. Teams running a tight tank farm often work backward from the 14-day mark and set their reorder point accordingly. Quality confirmation before shipment is part of the package. Samples can be shipped for in-house testing with freight collect, so your laboratory can run checks such as boiling range, vapor pressure, or a full COA comparison. Historical SGS reports are available for review, and pre-shipment SGS inspection can be arranged at the loading point. Send the target grade, packaging format, destination port, and required delivery window to Yingtai Chemical, which supplies isooctane as a bulk blending component and builds each quotation around the program rather than a generic list. Pricing is quoted per order because freight, packaging, and volume change the number.
Isooctane earns its place in a blending program because it is a fixed point in a variable system: RON 100 by definition, ≥99.5% purity in both industrial and analytical grades, and low sulfur and olefins that simplify finished-fuel compliance. The procurement side is just as concrete—one 20-foot container as the order unit, five packaging formats, T/T or L/C settlement, and 14 working days from deposit or original L/C to dispatch. Match those conditions to your tank farm, consumption rate, and market rules, especially for aviation gasoline where the specification set is market-specific. Send your target grade, packaging preference, port, and required delivery window, and the quote can be built around your program rather than a template.
A：Industrial grade is the standard choice for high-octane gasoline blending programs. It is supplied at ≥99.5% purity with low sulfur and low olefins, which keeps the antiknock contribution consistent from batch to batch. Analytical grade uses the same purity floor and is normally reserved for laboratories doing CFR engine calibration or fuel octane testing, where the reference material itself must stay neutral in the measurement.
A：Isooctane is the upper anchor of the octane scale, so its Research Octane Number is 100 by definition rather than by measurement against another fuel. N-heptane sits at the bottom with a value of 0. Any test fuel that behaves like a given isooctane and n-heptane mixture takes that mixture’s rating, which is why CFR engines and calibration laboratories use isooctane as the reference point for the top of the scale.
A：Yes. Bulk supply is available at a minimum order quantity of one 20-foot container, with steel drums, plastic drums, IBC tanks, flexitanks, or ISO tanks depending on your receiving setup. Settlement is by T/T or L/C, and lead time is 14 working days after the deposit or original L/C arrives. Aviation gasoline specifications vary by market, so confirm your local specification against the proposed component before committing.
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Isooctane (2,2,4-Trimethylpentane) CAS 540-84-1 High Purity ≥99.5%
