Heptane (C7H16)
n-Heptane is the straight-chain alkane with the chemical formula H3C(CH2)5CH3 or C7H16, and is one of the main components of gasoline (petrol). When used as a test fuel component in anti-knock test engines, a 100% heptane fuel is the zero point of the octane rating scale (the 100 point is 100% iso-octane). Octane number equates to the anti-knock qualities of a comparison mixture of heptane and isooctane which is expressed as the percentage of isooctane in heptane and is listed on pumps for gasoline (petrol) dispensed globally.
SEMA Gases is a manufacturer of span gases in disposable cylinder cans from the Netherlands, established from the want to create a label which is applicable for all brands of gas detection equipment. The products of SEMA Gases are used for calibration of portable gas detection instruments and calibration of fixed gas detection systems. SEMA Gases produces single gases (flammable gases, oxygen, toxic gases) and gas mixtures (2, 3, 4 or 5 gas mixtures) in various cylinder size up to 110 ltr.
Heptane Calibration Gases
| 34L | 58L | 110L | Cert. tol. | Prod. tol. | Stability (months) |
|
|---|---|---|---|---|---|---|
| 0.2 % Heptane // Air | Available | Available | Unavailable | +/- 2% | +/- 5% | 60 |
| 0.44 % Heptane // Air | Available | Available | Unavailable | +/- 2% | +/- 5% | 60 |
| 0.45 % Heptane // Air | Available | Available | Unavailable | +/- 2% | +/- 5% | 60 |
| 0.55 % Heptane // Air | Available | Available | Unavailable | +/- 2% | +/- 5% | 60 |
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