Iso-Butylene (I-C4H8)
Isobutylene (or 2-methylpropene) is a hydrocarbon of industrial significance. It is a four-carbon branched alkene (olefin), one of the four isomers of butylene. At standard temperature and pressure it is a colourless flammable gas. Isobutylene is used as an intermediate in the production of a variety of products. It is reacted with methanol and ethanol in the manufacture of the gasoline oxygenates methyl tert-butyl ether (MTBE) and ethyl tert-butyl ether (ETBE), respectively.
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.
Iso-Butylene Calibration Gases
| 34L | 58L | 110L | Cert. tol. | Prod. tol. | Stability (months) |
|
|---|---|---|---|---|---|---|
| 8 ppm Iso-Butylene // Air | Available | Available | Available | +/- 10% | +/- 20% | 60 |
| 10 ppm Iso-Butylene // Air | Available | Available | Available | +/- 10% | +/- 20% | 60 |
| 100 ppm Iso-Butylene // Air | Available | Available | Available | +/- 2% | +/- 10% | 60 |
| 1000 ppm Iso-Butylene // Air | Available | Available | Available | +/- 2% | +/- 5% | 60 |
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