二十四烷

Description

Tetracosane · CAS 646-31-1 · C24H50. UNII YQ5H1M1D7I. Boiling Point: 736.3 °F at 760 mmHg (NTP, 1992); Boiling Point: 391 °C; Boiling Point: 390.00 to 392.00 °C. @ 760.00 mm Hg.

Identification

CAS Registry Number	646-31-1
PubChem CID	12592
Molecular formula	C24H50
IUPAC name	tetracosane
UNII (FDA)	YQ5H1M1D7I

Computed Descriptors

Molecular Weight	338.7
XLogP3	12.6
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	0
Rotatable Bond Count	21
Exact Mass	338.391251595
Monoisotopic Mass	338.391251595
Topological Polar Surface Area	0
Heavy Atom Count	24
Formal Charge	0

Physical & Chemical Properties

Boiling Point	736.3 °F at 760 mmHg (NTP, 1992)
Boiling Point	391 °C
Boiling Point	390.00 to 392.00 °C. @ 760.00 mm Hg
Melting Point	126 °F (NTP, 1992)
Melting Point	50.3 °C
Melting Point	54 °C
Flash Point	> 113.00 °C (> 235.40 °F) - closed cup
Density	0.7991 g/cu cm at 20 °C

Physical description & handling notes

• N-tetracosane is a crystalline waxy solid. Insoluble in water. Used in organic synthesis.
• Waxy solid; [CAMEO] White crystalline solid; [Alfa Aesar MSDS]
• Solid
• Crystals
• Crystals from ether
• White powder

Regulatory Status

GHS notification summary	100% (8 / 8)

GHS Hazard Classification

GHS notification summary	100% (8 / 8)

Documented Uses

• Used in organic synthesis; [CAMEO]
• 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/
• 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
• Suitable sources for n-alkanes with more than six carbon atoms are the appropriate petroleum distillate fractions, from which the n-paraffins can be isolated in high isomeric purity (= 95% linearity) by selective separation techniques, especially fractional distillation. /Higher n-Alkanes/
• Gas-phase dehydrogenation of n-alkanes over noble-metal catalysts yield the corresponding n-alkenes at low conversion rates (ca. 10%) with predominantly internal double bonds. The corresponding alkenes can be isolated in high purity by selective molecular-sieve processes. /Higher n-Alkanes/

Synonyms

TETRACOSANE; n-Tetracosane; 646-31-1; YQ5H1M1D7I; CHEBI:32936; NSC-2984; DTXSID8060955; RefChem:49853; DTXCID7044346; 211-474-5; Tricosane, methyl-; Lignocerane; MFCD00009352; UNII-YQ5H1M1D7I; Tetracosane, 99%; C24H50

Frequently Asked Questions

What are the CAS number and molecular formula of Tetracosane?

CAS 646-31-1; molecular formula C24H50; molecular weight — g/mol.

What other names is Tetracosane known by?

TETRACOSANE, n-Tetracosane, 646-31-1, YQ5H1M1D7I, CHEBI:32936, NSC-2984.

Is Tetracosane classified as hazardous?

100% of GHS notifications report no hazard classification (8 of 8).

What are the key physical properties of Tetracosane?

Boiling Point: 736.3 °F at 760 mmHg (NTP, 1992); Boiling Point: 391 °C; Boiling Point: 390.00 to 392.00 °C. @ 760.00 mm Hg; Melting Point: 126 °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.