n-Hexadecyl mercaptan

Description

n-Hexadecyl mercaptan · CAS 2917-26-2 · C16H34S. UNII QR98QIO1QL. Melting Point: 18 °C; Melting Point: 64-68 °F; Flash Point: 215 °F (NIOSH, 2024).

Identification

CAS Registry Number	2917-26-2
PubChem CID	18015
Molecular formula	C16H34S
IUPAC name	hexadecane-1-thiol
UNII (FDA)	QR98QIO1QL

Computed Descriptors

Molecular Weight	258.5
XLogP3	8.3
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	14
Exact Mass	258.23812226
Monoisotopic Mass	258.23812226
Topological Polar Surface Area	1
Heavy Atom Count	17
Formal Charge	0

Physical & Chemical Properties

Melting Point	18 °C
Melting Point	64-68 °F
Flash Point	215 °F (NIOSH, 2024)
Flash Point	Flash point =102 °C
Flash Point	135 °C o.c.
Flash Point	215 °F
Density	0.85
Vapor Pressure	0.1 mmHg (NIOSH, 2024)
Vapor Pressure	0.1 [mmHg]
Vapor Pressure	0.1 mmHg

Physical description & handling notes

• 1-hexadecanethiol appears as colorless liquid or white solid (below 19 °C) with a strong unpleasant odor. Density (as liquid at 25 °C): 0.83 g/cm3.
• Colorless liquid or solid (below 64-68 degrees F) with a strong odor; [NIOSH]
• LIQUID WITH CHARACTERISTIC ODOUR.
• Colorless liquid or solid (below 64-68 °F) with a strong odor.
• 64 to 68 °F (NIOSH, 2024)
• Insoluble (NIOSH, 2024)

GHS Hazard Classification

Reported hazard statements	H319 (100%), H413 (95.2%)

Documented Uses

• 1-Hexadecanethiol is used as an intermediate in organic synthesis; in synthetic rubber processing; in surface-active agents; as a polymerization conditioner; and as a corrosion inhibitor.(4,6) [CHEMINFO]

Synonyms

1-HEXADECANETHIOL; hexadecane-1-thiol; 2917-26-2; Hexadecanethiol; Cetyl mercaptan; Hexadecyl mercaptan; n-Hexadecanethiol; n-Hexadecyl mercaptan; hexadecylthiol; 1-Mercaptohexadecane; n-hexadecylthiol; QR98QIO1QL; NSC 57866; NSC-57866; DTXSID6062709; NSC-229611

Frequently Asked Questions

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

CAS 2917-26-2; molecular formula C16H34S; molecular weight — g/mol.

What other names is n-Hexadecyl mercaptan known by?

1-HEXADECANETHIOL, hexadecane-1-thiol, 2917-26-2, Hexadecanethiol, Cetyl mercaptan, Hexadecyl mercaptan.

Is n-Hexadecyl mercaptan classified as hazardous?

Hazard statements reported: H319, H413.

What are the key physical properties of n-Hexadecyl mercaptan?

Melting Point: 18 °C; Melting Point: 64-68 °F; Flash Point: 215 °F (NIOSH, 2024); Flash Point: Flash point =102 °C.

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.