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Sulfur and phosphorus compounds

Thioacetamide

Also known as Ethanethioamide, Acetothioamide, Thiacetamide

CAS 62-55-5Formula C2H5NSMolar mass 75.14 g/molEC 200-541-4
GHS signal word: Danger. Pictograms: Harmful or irritant, Serious health hazard 105 suppliers listed
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Thioacetamide chemical structure, C2H5NS, CAS 62-55-5
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Crystals from benzene
Melting point
113 to 114
Solubility
In water, 1.63 × 10⁺⁵ mg/l @ 25 °C.
HS code
293090
Category
Sulfur and phosphorus compounds
Illustrative photo, 25 kg white woven sacks of powder on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Thioacetamide?

Plain description, key identifiers and synonyms

Thioacetamide is a thiocarboxamide consiting of acetamide having the oxygen replaced by sulfur. It has a role as a hepatotoxic agent. It is functionally related to an acetamide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
ethanethioamide
CAS number
62-55-5 CAS number cross-checked
EC number
200-541-4
Molecular formula
C2H5NS
UNII
075T165X8M
MDL number
MFCD00008070
InChIKey
YUKQRDCYNOVPGJ-UHFFFAOYSA-N
InChI
InChI=1S/C2H5NS/c1-2(3)4/h1H3,(H2,3,4)
SMILES (canonical and isomeric)
CC(=S)N

Synonyms

  • Ethanethioamide
  • Acetothioamide
  • Thiacetamide
  • Acetamide, thio-
  • Thioacetimidic acid
  • Acetimidic acid, thio-
  • USAF CB-21
  • USAF EK-1719
  • Thiacetamid
  • Acetic acid, thiono-, amide
  • Thioacetamid
  • Sulfo-amine
  • Ethanimidothioic acid
  • TAA
  • RCRA waste number U218
  • methylthioamide
  • thioacetoamide
  • Thioactamide
  • acetic acid thioamide
  • Ethanethioamide, Acetothioamide, Thiacetamide
  • Acetamide, thio- (VAN)
  • RCRA waste no. U218
  • thioacteamide
  • Thioacetamide(TAA)
  • Thiocetamide solution
Show all 34 synonyms
  • methane, thiocarbamoyl-
  • CH3CSNH2
  • Thioacetamide, acs
  • Thioacetamide, reag.
  • Thioacetamide, 95%
  • Yukqrdcynovpgj-uhfffaoysa-
  • Thioacetamide, reagent grade, 98%
  • Thioacetamide, ACS reagent, >=99.0%
  • Thioacetamide, p.a., ACS reagent, 99%

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Appearance
Crystals from benzeneexp.
Odour
Slight odor of mercaptansexp.
Melting point
113 to 114exp.
Solubility
In water, 1.63 × 10⁺⁵ mg/l @ 25 °C.exp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
75.14 g/molcalc.
Exact mass
75.0143 Dacalc.
LogP (octanol/water)
0.29calc.
Topological polar surface area
26.02 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
0calc.
Heavy atoms
4calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0.5calc.
Formal charge
0calc.
Stereocentres
0calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H302Harmful if swallowed.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H350May cause cancer.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (17)
  • P203Obtain, read and follow all safety instructions before use.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P302 + P352If on skin: Wash with plenty of water.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P318If exposed or concerned, get medical advice.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Thioacetamide suppliers

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All 105 suppliers
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Where suppliers are based

105 suppliers in 17 countries

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Thioacetamide price

Indicative price range per kg from live supplier offers

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Uses and applications

What the substance is used for, by industry and function

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).

Roles

  • aetiopathogenetic role
  • hepatotoxic agent

Pharmacology

Thioacetamide is a synthetic, colorless crystalline solid that is soluble in water and ethanol. Thioacetamide is currently only used as a replacement for hydrogen sulfide in qualitative analysis. When heated to decomposition, it emits toxic fumes of nitrogen oxides and sulfur oxides. The primary routes of potential human exposure to thioacetamide are inhalation and dermal contact. It is reasonably anticipated to be a human carcinogen. (NCI05)

How it is made

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).

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 616-026-00-6

Health and food

  • EU Cosmetics Regulation Annex II, prohibited in cosmetics
    Name: Thioacetamide, Ref no: 742, Annex ref: II/742

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Thioacetamide is traded under.

HS 2930.90Indicative HS code

Organo-sulphur compounds, other

World exports in 2024
$5.83B
+0.1% vs 2023, imports $5.93B
2019 to 2024
Top exporters
  1. China40.7%
  2. United States10.9%
  3. Japan9.3%
Top importers
  1. United States13.3%
  2. Brazil12.6%
  3. China6.6%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Thioacetamide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Thioacetamide, based on the data on this page

What is Thioacetamide?

Thioacetamide is a thiocarboxamide consiting of acetamide having the oxygen replaced by sulfur. It has a role as a hepatotoxic agent. It is functionally related to an acetamide.

What is the CAS number of Thioacetamide?

The CAS registry number of Thioacetamide is 62-55-5.

What is the molecular formula and weight of Thioacetamide?

The molecular formula of Thioacetamide is C2H5NS and its molar mass is 75.14 g/mol.

What is Thioacetamide used for?

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).

Is Thioacetamide hazardous?

Thioacetamide carries the GHS signal word "Danger". Main hazards: harmful if swallowed, causes skin irritation, causes serious eye irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Thioacetamide?

Thioacetamide is usually classified under HS code 293090 (Organo-sulphur compounds, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Thioacetamide?

CompoundList lists 105 suppliers of Thioacetamide in China, United States, United Kingdom, Germany and 13 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Thioacetamide in India?

4 suppliers in India list Thioacetamide on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Thioacetamide?

Suppliers quote Thioacetamide on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Thioacetamide

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Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
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