Triptane

Triptane
IUPAC name 2,2,3-Trimethylbutane[1]
Identifiers
CAS number	464-06-2 Y
PubChem	10044
ChemSpider	9649 Y
EC number	207-346-3
UN number	1206
Beilstein Reference	1730756
Jmol-3D images	Image 1
SMILES CC(C)C(C)(C)C
InChI InChI=1S/C7H16/c1-6(2)7(3,4)5/h6H,1-5H3 Y Key: ZISSAWUMDACLOM-UHFFFAOYSA-N Y
Properties
Molecular formula	C7H16
Molar mass	100.20 g mol−1
Appearance	Colorless liquid
Odor	Odorless
Density	693 mg mL−1
Melting point	−26 to −24 °C; −15 to −11 °F; 247 to 249 K
Boiling point	80.8 to 81.2 °C; 177.3 to 178.1 °F; 353.9 to 354.3 K
Vapor pressure	23.2286 kPa (at 37.7 °C)
kH	4.1 nmol Pa−1 kg−1
Refractive index (nD)	1.389
Thermochemistry
Std enthalpy of formation ΔfHo298	−238.0 – −235.8 kJ mol−1
Std enthalpy of combustion ΔcHo298	−4.80449 – −4.80349 MJ mol−1
Standard molar entropy So298	292.25 J K−1 mol−1
Specific heat capacity, C	213.51 J K−1 mol−1
Hazards
GHS pictograms
GHS signal word	DANGER
GHS hazard statements	H225, H304, H315, H336, H400
GHS precautionary statements	P210, P261, P273, P301+310, P331
EU Index	601-008-00-2
EU classification	F Xn N
R-phrases	R11, R38, R50/53, R65, R67
S-phrases	(S2), S16, S29, S33
NFPA 704	3 0 0
Flash point	−7 °C; 19 °F; 266 K
Autoignition temperature	450 °C; 842 °F; 723 K
Explosive limits	1–7%
Related compounds
Related alkanes	Neopentane 2,2-Dimethylbutane 2,3-Dimethylbutane Tetramethylbutane Tetraethylmethane 2,2,4-Trimethylpentane 2,3,3-Trimethylpentane 2,3,4-Trimethylpentane Tetra-tert-butylmethane
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

Triptane, or 2,2,3-trimethylbutane, is an organic chemical compound with the molecular formula C₇H₁₆ or (H₃C-)₃C-C(-CH₃)₂H. It is therefore an alkane, specifically the most compact and heavily branched of the heptane isomers, the only one with a butane (C₄) backbone.

Triptane is commonly used as an anti-knock additive in aviation fuels.

References