Question

The number of isomers of octane with five carbons in their prinical chain

Answer 1

Answer:

Octane[1]

Identifiers

CAS Number

111-65-9 ☑

3D model (JSmol)

Interactive image

3DMet

B00281

Beilstein Reference

1696875

ChEBI

CHEBI:17590 ☒

ChEMBL

ChEMBL134886 ☑

ChemSpider

349 ☑

DrugBank

DB02440 ☒

ECHA InfoCard

100.003.539

EC Number

203-892-1

Gmelin Reference

82412

KEGG

C01387 ☑

MeSH

octane

PubChem CID

356

RTECS number

RG8400000

UN number

1262

CompTox Dashboard (EPA)

DTXSID0026882 Edit this at Wikidata

InChI

InChI=1S/C8H18/c1-3-5-7-8-6-4-2/h3-8H2,1-2H3 ☑

Key: TVMXDCGIABBOFY-UHFFFAOYSA-N ☑

SMILES

CCCCCCCC

Properties

Chemical formula

C8H18

Molar mass

114.232 g·mol−1

Appearance

Colorless liquid

Odor

Gasoline-like[2]

Density

0.703 g cm−3

Melting point

−57.1 to −56.6 °C; −70.9 to −69.8 °F; 216.0 to 216.6 K

Boiling point

125.1 to 126.1 °C; 257.1 to 258.9 °F; 398.2 to 399.2 K

Solubility in water

0.007 mg dm−3 (at 20 °C)

log P

4.783

Vapor pressure

1.47 kPa (at 20.0 °C)

Henry's law

constant (kH)

29 nmol Pa−1 kg−1

Conjugate acid

Octonium

Magnetic susceptibility (χ)

-96.63·10−6 cm3/mol

Refractive index (nD)

1.398

Viscosity

0.509 mPa·s (25 °C)[3]

0.542 mPa·s (20 °C)

Thermochemistry

Heat capacity (C)

255.68 J K−1 mol−1

Std molar

entropy (So298)

361.20 J K−1 mol−1

Std enthalpy of

formation (ΔfH⦵298)

−252.1–−248.5 kJ mol−1

Std enthalpy of

combustion (ΔcH⦵298)

−5.53–−5.33 MJ mol−1

Hazards

GHS pictograms

GHS02: Flammable GHS07: Harmful GHS08: Health hazard GHS09: Environmental hazard

GHS Signal word

Danger

GHS hazard statements

H225, H304, H315, H336, H410

GHS precautionary statements

P210, P261, P273, P301+310, P331

NFPA 704 (fire diamond)

NFPA 704 four-colored diamond

310

Flash point

13.0 °C (55.4 °F; 286.1 K)

Autoignition

temperature

220.0 °C (428.0 °F; 493.1 K)

Explosive limits

0.96–6.5%

Lethal dose or concentration (LD, LC):

LDLo (lowest published)

428 mg/kg (mouse, intravenous)[4]

NIOSH (US health exposure limits):

PEL (Permissible)

TWA 500 ppm (2350 mg/m3)[2]

REL (Recommended)

TWA 75 ppm (350 mg/m3) C 385 ppm (1800 mg/m3) [15-minute][2]

IDLH (Immediate danger)

1000 ppm[2]

Related compounds

Related alkanes

Heptane

Nonane