China Chemical Solvent CAS 142-82-5 Heptane, Find details about China High Quality Heptanal, N Heptane 99% for Chemical Solvent from Chemical Solvent CAS 142-82-5 Heptane
Chemical Solvent Cas 142-82-5 Heptane
Heptane or 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.
Specifications:
Test | Specification | Result |
Assay (GC),Heptanes | 99.9%min. | >99.9% |
Assay (GC),Normal Heptane | 99.0% | 99.38% |
Assay (GC),Otder Isomers | 1.0% max. | <1.0% |
Boiling Range | 92.3C-99.9C | Pass |
Specific Gravity @15.56C | 0.68-0.695 | Pass |
Acidity as Acetic Acid | 0.002% max | <0.0002% |
Residue After Evaporation | 10 ppm max. | <10 ppm |
Sulfer (as S) | 0.001% max. | <0.0001% |
Water | 0.005% | 0.003% |
Uses
Heptane (and its many isomers) is widely used in laboratories as a non-polar solvent. As a liquid, it is ideal for transport and storage. In the grease spot test, heptane is used to dissolve an oil spot to show the previous presence of organic compounds on a stained paper. This is done by shaking the stained paper in a heptane solution for about half a minute.
Aqueous bromine may be distinguished from aqueous iodine by its appearance after extraction into heptane. In water, both bromine and iodine appear brown. However, iodine turns purple when dissolved in heptane, whereas the bromine solution remains brown.
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