Thioacetamide

Description

Thioacetamide · CAS 62-55-5 · C2H5NS. UNII 075T165X8M. Melting Point: 234 to 237 °F (NTP, 1992); Melting Point: 113-114 °C; Melting Point: 113-116 °C.

Identification

CAS Registry Number	62-55-5
PubChem CID	2723949
Molecular formula	C2H5NS
IUPAC name	ethanethioamide
UNII (FDA)	075T165X8M

Computed Descriptors

Molecular Weight	75.14
XLogP3	-0.3
Hydrogen Bond Donor Count	1
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	0
Exact Mass	75.01427034
Monoisotopic Mass	75.01427034
Topological Polar Surface Area	58.1
Heavy Atom Count	4
Formal Charge	0

Physical & Chemical Properties

Melting Point	234 to 237 °F (NTP, 1992)
Melting Point	113-114 °C
Melting Point	113-116 °C
Melting Point	115.5 °C
Solubility	5 to 10 mg/mL at 68 °F (NTP, 1992)
Solubility	In water, 1.63X10+5 mg/l @ 25 °C.
Vapor Pressure	15.2 [mmHg]
LogP	log Kow = -0.26
LogP	-0.46/-0.36
LogP	-0.26

Physical description & handling notes

• Thioacetamide appears as white crystals with a mercaptan odor.
• Colorless solid; [ICSC] Colorless or yellow solid with a mild odor of mercaptans; [HSDB] White solid; [CAMEO] Colorless crystalline solid with an odor of rotten eggs; [Alfa Aesar MSDS]
• COLOURLESS CRYSTALS WITH CHARACTERISTIC ODOUR.
• Crystals from benzene
• Colorless leaflets
• Yellow tablets

GHS Hazard Classification

Reported hazard statements	H302, H315, H319, H350, H412, H341, H351, H371

Documented Uses

• Used as a replacement for gaseous hydrogen sulfide in qualitative analysis; Used formerly as a stabilizer of motor fuel containing tetraethyl lead and mordant of seed grain (combined with mercury); [HSDB]
• Petroleum Production and Refining [Category: Industry]
• As replacement for gaseous hydrogen sulfide in qualitative analysis.
• The addition of thioacetamide to 1,4-benzoquinone produces modest yields of 2-substituted 3a-Hydroxy-1,3-benzothiazol-6(3aH)-ones.
• Stabilizer of motor fuel containing tetraethyl lead ... mordant of seed grain in combination with mercury /Former use/
• Prepn: prepd by heating ammonium acetate and aluminum sulfide: Kindler, Finndorf, Ber 54, 1080 (1921); from acetonitrile + H2S: Kindler, Ann 431, 203 (1923); from acetamide + K3PS4: Schultz, Ranke, Arch Pharm 294, 82 (1961).

Synonyms

THIOACETAMIDE; Ethanethioamide; 62-55-5; Acetothioamide; Thiacetamide; Acetamide, thio-; Thioacetimidic acid; Acetimidic acid, thio-; USAF CB-21; USAF EK-1719; Thiacetamid; Acetic acid, thiono-, amide; DTXSID9021340; NSC-2120; 075T165X8M; DTXCID901340

Frequently Asked Questions

What are the CAS number and molecular formula of Thioacetamide?

CAS 62-55-5; molecular formula C2H5NS; molecular weight — g/mol.

What other names is Thioacetamide known by?

THIOACETAMIDE, Ethanethioamide, 62-55-5, Acetothioamide, Thiacetamide, Acetamide, thio-.

Is Thioacetamide classified as hazardous?

Hazard statements reported: H302, H315, H319, H350, H412.

What are the key physical properties of Thioacetamide?

Melting Point: 234 to 237 °F (NTP, 1992); Melting Point: 113-114 °C; Melting Point: 113-116 °C; Melting Point: 115.5 °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.