Octadecane

Description

Octadecane · CAS 593-45-3 · C18H38. UNII N102P6HAIU. Boiling Point: 601 °F at 760 mmHg (NTP, 1992); Boiling Point: 316 °C; Boiling Point: 316.00 to 317.00 °C. @ 760.00 mm Hg.

Identification

CAS Registry Number	593-45-3
PubChem CID	11635
Molecular formula	C18H38
IUPAC name	octadecane
UNII (FDA)	N102P6HAIU

Computed Descriptors

Molecular Weight	254.5
XLogP3	9.3
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	0
Rotatable Bond Count	15
Exact Mass	254.297351212
Monoisotopic Mass	254.297351212
Topological Polar Surface Area	0
Heavy Atom Count	18
Formal Charge	0

Physical & Chemical Properties

Boiling Point	601 °F at 760 mmHg (NTP, 1992)
Boiling Point	316 °C
Boiling Point	316.00 to 317.00 °C. @ 760.00 mm Hg
Boiling Point	316.3 °C @760 [mm Hg]
Melting Point	82.9 °F (NTP, 1992)
Melting Point	[CAMEO] 82 °F
Melting Point	28.17 °C
Melting Point	28 °C
Flash Point	212 °F (NTP, 1992)
Flash Point	166 °C (331 °F) - closed cup

Physical description & handling notes

• N-octadecane is a colorless liquid. (NTP, 1992)
• Liquid; Dry Powder; Other Solid
• Clear liquid; [CAMEO] White, low melting solid; [MSDSonline]
• Solid
• Needles from alcohol, ether-methanol
• Colorless liquid

Regulatory Status

Regulatory & Food Contact	CIR / INCI: Skin conditioning; Solvent; Emollient
GHS notification summary	9.9% (163 / 1644)

GHS Hazard Classification

GHS notification summary	9.9% (163 / 1644)
Reported hazard statements	H304 (89.7%)

Documented Uses

• Used as a solvent and in organic synthesis; [Hawley]
• Octadecane is used as a solvent, in organic synthesis, and as a calibration standard.
• They are used mainly in applications for which isoalkanes are not acceptable for biological reasons, e.g., the production of detergents or proteins. /Higher n-Alkanes/
• Solid n-alkanes (paraffin waxes) are used in a variety of applications, e.g., ... oxidation, and chlorination reactions. /Higher n-Alkanes/
• Cosmetics -> Skin conditioning; Solvent; Emollient
• Not Known or Reasonably Ascertainable

Synonyms

OCTADECANE; n-Octadecane; 593-45-3; N102P6HAIU; DTXSID9047172; NSC-4201; DTXCID7027172; CHEBI:32926; RefChem:6081; octadecane, 14C-labeled cpd; 209-790-3; Octadecan; Octadecane, n-; TS Paraffin TS 8; Octadecane, 99%; NSC 4201

Frequently Asked Questions

What are the CAS number and molecular formula of Octadecane?

CAS 593-45-3; molecular formula C18H38; molecular weight — g/mol.

What other names is Octadecane known by?

OCTADECANE, n-Octadecane, 593-45-3, N102P6HAIU, DTXSID9047172, NSC-4201.

What is the regulatory status of Octadecane?

Documented regulatory listings: CIR / INCI: Skin conditioning; Solvent; Emollient.

Is Octadecane classified as hazardous?

9.9% of GHS notifications report no hazard classification (163 of 1644).

What are the key physical properties of Octadecane?

Boiling Point: 601 °F at 760 mmHg (NTP, 1992); Boiling Point: 316 °C; Boiling Point: 316.00 to 317.00 °C. @ 760.00 mm Hg; Boiling Point: 316.3 °C @760 [mm Hg].

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.