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Herbicides

Thiosemicarbazide

Also known as aminothiourea, Hydrazinecarbothioamide, N-Aminothiourea

CAS 79-19-6Formula CH5N3SMolar mass 91.14 g/molEC 201-184-7
GHS signal word: Danger. Pictograms: Acute toxicity (severe) 52 suppliers listed
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Thiosemicarbazide chemical structure, CH5N3S, CAS 79-19-6
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White crystalline powder
Melting point
183 °C
Solubility
In water, 1./0 × 10⁺⁴ mg/L at 20 °C
HS code
293090
Category
Herbicides
UN number
UN 2811
Illustrative photo, off-white crystalline powder with an amber glass bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Thiosemicarbazide?

Plain description, key identifiers and synonyms

Hydrazinecarbothioamide is a member of the class of thioureas that is thiourea in which a hydrogen of one of the amino groups is replaced by an amino group. It is a member of hydrazines, a thiocarboxamide and a member of thioureas.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
aminothiourea
CAS number
79-19-6 CAS number cross-checked
EC number
201-184-7
Molecular formula
CH5N3S
UNII
6056O8W6ET
MDL number
MFCD00007620
InChIKey
BRWIZMBXBAOCCF-UHFFFAOYSA-N
InChI
InChI=1S/CH5N3S/c2-1(5)4-3/h3H2,(H3,2,4,5)
SMILES (canonical and isomeric)
C(=S)(N)NN

Synonyms

  • aminothiourea
  • Hydrazinecarbothioamide
  • N-Aminothiourea
  • 1-Aminothiourea
  • Isothiosemicarbazide
  • 2-Thiosemicarbazide
  • 3-Thiosemicarbazide
  • Thiocarbamylhydrazine
  • Thiocarbamoylhydrazine
  • Semicarbazide, thio-
  • Aminothio-urea
  • Thiocarbamoyl hydrazide
  • 1-Amino-2-thiourea
  • Semicarbazide, 3-thio-
  • USAF EK-1275
  • RCRA waste number P116
  • TSZ
  • Thiosemicarbazine
  • aminohydrazinomethane-1-thione
  • Isothiosemicarbazide (VAN)
  • RCRA waste no. P116
  • aminoisothiourea
  • thio-semicarbazide
  • 3-aminoisothiourea
  • Thiosemicarbazide, 98%
Show all 31 synonyms
  • Thiosemicarbazide, 99%
  • (aminothioxomethyl)hydrazine
  • (aminothioxomethyl)-hydrazine
  • Thiosemicarbazide, p.a., 98%
  • Thiosemicarbazide, puriss. p.a., 98%
  • Thiosemicarbazide, purum, >=98.0% (RT)

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
White crystalline powderexp.
Odour
Odorlessexp.
Melting point
183 °Cexp.
Solubility
In water, 1./0 × 10⁺⁴ mg/L at 20 °Cexp.

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
91.14 g/molcalc.
Exact mass
91.0204 Dacalc.
LogP (octanol/water)
-1.31calc.
Topological polar surface area
64.07 Ųcalc.
Hydrogen bond donors
3calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
5calc.
Rings
0calc.
Aromatic rings
0calc.
Fraction sp3 carbons
0calc.
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
GHS06: Acute toxicity (severe)
Acute toxicity (severe)

Hazard statements

  • H300Fatal if swallowed.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (8)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.
UN number
UN 2811

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

Thiosemicarbazide suppliers

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All 52 suppliers
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Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

52 suppliers in 11 countries

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Thiosemicarbazide 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

Reagent for ketones and certain metals, photography, rodenticide.

Chemical intermediate for herbicides (eg, tebuthiuron), reagent for detection of metals (possible use).

Used as chemical intermediates... are useful in forming 1,3,4-thiadiazoles, as a class of compounds having herbicidal activity. (Thiosemicarbazides).

As a reagent for detection of metals.

Pharmacological actions

  • Convulsants
  • Enzyme Inhibitors

How it is made

Made from CS2 and hydrazine.

From potassium thiocyanate and hydrazine salts.

Regulatory status

Inventories, regulations and trade controls that list this substance

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 Thiosemicarbazide 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 Thiosemicarbazide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Thiosemicarbazide?

Hydrazinecarbothioamide is a member of the class of thioureas that is thiourea in which a hydrogen of one of the amino groups is replaced by an amino group. It is a member of hydrazines, a thiocarboxamide and a member of thioureas.

What is the CAS number of Thiosemicarbazide?

The CAS registry number of Thiosemicarbazide is 79-19-6.

What is the molecular formula and weight of Thiosemicarbazide?

The molecular formula of Thiosemicarbazide is CH5N3S and its molar mass is 91.14 g/mol.

What is Thiosemicarbazide used for?

Reagent for ketones and certain metals, photography, rodenticide. Chemical intermediate for herbicides (eg, tebuthiuron), reagent for detection of metals (possible use). Used as chemical intermediates... are useful in forming 1,3,4-thiadiazoles, as a class of compounds having herbicidal activity. (Thiosemicarbazides).

Is Thiosemicarbazide hazardous?

Thiosemicarbazide carries the GHS signal word "Danger". Main hazards: fatal if swallowed, harmful to aquatic life with long lasting effects. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Thiosemicarbazide?

Thiosemicarbazide 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 Thiosemicarbazide?

CompoundList lists 52 suppliers of Thiosemicarbazide in China, United States, United Kingdom, Hong Kong and 7 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Thiosemicarbazide in India?

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

What is the price of Thiosemicarbazide?

Suppliers quote Thiosemicarbazide 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 Thiosemicarbazide

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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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