正二十二烷

Description

n-Docosane · CAS 629-97-0 · C22H46. UNII OW99Q363KO. Boiling Point: 695.5 °F at 760 mmHg (NTP, 1992); Boiling Point: 369 °C; Boiling Point: BP: 230 °C (15 mm Hg).

Identification

CAS Registry Number	629-97-0
PubChem CID	12405
Molecular formula	C22H46
IUPAC name	docosane
UNII (FDA)	OW99Q363KO

Computed Descriptors

Molecular Weight	310.6
XLogP3	11.5
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	0
Rotatable Bond Count	19
Exact Mass	310.359951467
Monoisotopic Mass	310.359951467
Topological Polar Surface Area	0
Heavy Atom Count	22
Formal Charge	0

Physical & Chemical Properties

Boiling Point	695.5 °F at 760 mmHg (NTP, 1992)
Boiling Point	369 °C
Boiling Point	BP: 230 °C (15 mm Hg)
Melting Point	111.9 °F (NTP, 1992)
Melting Point	43.8 °C
Flash Point	113 °C (235 °F) - closed cup
Solubility	In water. 7.77X10-7 mg/L at 25 °C
Density	0.7944 g/cu cm at 20 °C
Density	Density: 0.778 g/cu m (45/5 °C)
Vapor Pressure	1.28X10-6 mm Hg at 25 °C

Physical description & handling notes

• N-docosane is a solid. Insoluble in water. Used in organic synthesis, calibration, and temperature sensing equipment.
• Other Solid
• Solid; [Hawley] White crystalline solid; [MSDSonline]
• Platelets from toluene; crystals from ether
• Solid
• Colorless crystals

Regulatory Status

GHS notification summary	82.8% (198 / 239)

GHS Hazard Classification

GHS notification summary	82.8% (198 / 239)
Reported hazard statements	H315 (16.7%), H319 (16.7%), H335 (16.7%)

Documented Uses

• Used in organic synthesis and in temperature-sensing devices; [Hawley]
• Organic synthesis, calibration, temperature-sensing devices.
• 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/
• Not Known or Reasonably Ascertainable
• The liquefaction of coal provides the greatest variety of saturated hydrocarbons. The Fischer-Tropsch synthesis produces alkanes from syngas (CO + H2) in the range C1 to C30 or higher depending on the process variant: depending on the catalyst employed, the synthesis yields predominantly liquid hydrocarbons in the gasoline range, along with gases from C1 to C4 when iron-based catalysts are used, while cobalt-based catalysts produce longer chain hydrocarbons in the diesel and wax range that often undergo, depending

Synonyms

DOCOSANE; n-Docosane; 629-97-0; OW99Q363KO; NSC-77139; PARAFOL 22-95; DTXSID7047063; CHEBI:46050; RefChem:35161; DTXCID5027063; 211-121-5; Dokosan; Normal-docosane; MFCD00009348; CH3-[CH2]20-CH3; Docosane, analytical standard

Frequently Asked Questions

What are the CAS number and molecular formula of n-Docosane?

CAS 629-97-0; molecular formula C22H46; molecular weight — g/mol.

What other names is n-Docosane known by?

DOCOSANE, n-Docosane, 629-97-0, OW99Q363KO, NSC-77139, PARAFOL 22-95.

Is n-Docosane classified as hazardous?

82.8% of GHS notifications report no hazard classification (198 of 239).

What are the key physical properties of n-Docosane?

Boiling Point: 695.5 °F at 760 mmHg (NTP, 1992); Boiling Point: 369 °C; Boiling Point: BP: 230 °C (15 mm Hg); Melting Point: 111.9 °F (NTP, 1992).

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.