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Insecticides and acaricides

Thioquinox

Also known as Quinothionate, Chinothionat, Thiaquinox

CAS 93-75-4Formula C9H4N2S3Molar mass 236.35 g/molEC 202-272-8
GHS signal word: Warning. Pictograms: Harmful or irritant
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Thioquinox chemical structure, C9H4N2S3, CAS 93-75-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Brownish yellow solid
Melting point
180 °C
Solubility
Insoluble in water
HS code
293499
Category
Insecticides and acaricides
Illustrative photo, yellow pigment powder in an open fibre drum in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Thioquinox?

Plain description, key identifiers and synonyms

Thioquinox is a quinoxaline antifungal agent, a quinoxaline acaricide and a dithioloquinoxaline.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
[1,3]dithiolo[4,5-b]quinoxaline-2-thione
CAS number
93-75-4 CAS number cross-checked
EC number
202-272-8
Molecular formula
C9H4N2S3
UNII
0DRA4L621C
MDL number
MFCD00145403
InChIKey
ILERPRJWJPJZDN-UHFFFAOYSA-N
InChI
InChI=1S/C9H4N2S3/c12-9-13-7-8(14-9)11-6-4-2-1-3-5(6)10-7/h1-4H
SMILES (canonical and isomeric)
C1=CC=C2C(=C1)N=C3C(=N2)SC(=S)S3

Synonyms

  • Quinothionate
  • Chinothionat
  • Thiaquinox
  • Readex
  • [1,3]dithiolo[4,5-b]quinoxaline-2-thione
  • Bayer 30686
  • Quinoxaline-2,3-diyl trithiocarbonate
  • 1,3-Dithiolo[4,5-b]quinoxaline-2-thione
  • 2-Thioxo-1,3-dithiolo(4,5-b)quinoxaline
  • BAY 30686
  • Eraditon
  • 2,3-Quinoxalinedithiol cyclic-trithiocarbonate
  • ENT 25,579
  • 2,3-Quinoxalinedithiol, cyclic trithiocarbonate
  • SS 1451
  • 2-Thio-1,3-dithio(4,5-b)quinoxaline
  • Trithiocarbonic acid, cyclic ester with 2,3-quinoxalinedithiol
  • Chinoxalin-2,3-diyl-trithiocarbonat
  • Carbonic acid, trithio-, cyclic 2,3-quinoxalinediyl ester
  • 1,3-Dithiolo(4,5-b)quinoxaline-2-thione
  • Chinoxalin-2,3-dithiol-cyclo-thio-carbonat
  • Carbonic acid, trithio-, cyclic ester with 2,3-quinoxalinedithiol
  • 2-Thio-1,3-dithio[4,5-b]quinoxaline
  • (1,3)dithiolo(4,5-b)quinoxaline-2-thione
  • Chinoxalin-2,3-diyl-trithiocarbonat (german)
Show all 33 synonyms
  • 2-thio-1,3-dithiolo
  • Bayer 4935
  • Chinoxalin2,3diyltrithiocarbonat
  • BAYER 31686
  • 2Thio1,3dithio(4,5b)quinoxaline
  • Quinoxaline2,3diyl trithiocarbonate
  • Chinoxalin2,3dithiolcyclothiocarbonat
  • 1,3Dithiolo(4,5b)quinoxaline2thione

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
Brownish yellow solidexp.
Odour
Odorlessexp.
Melting point
180 °Cexp.
Solubility
Insoluble in waterexp.
Vapour pressure
1 × 10⁻⁷ mm Hg 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
236.35 g/molcalc.
Exact mass
235.9537 Dacalc.
LogP (octanol/water)
3.64calc.
Topological polar surface area
25.78 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
0calc.
Heavy atoms
14calc.
Rings
3calc.
Aromatic rings
3calc.
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.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, S=c1sc2nc3ccccc3nc2s1

S=c1sc2nc3ccccc3nc2s1

3 rings, 14 atoms. This chemical is the scaffold itself.

1 other chemical share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS07: Harmful or irritant
Harmful or irritant

Hazard statements

  • H302Harmful if swallowed.
Precautionary statements (5)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • 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

Thioquinox suppliers

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Thioquinox 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

Good ovicide for control of spiders on ornamentals.

Thioquinox is a non-systemic acaricide effective against eggs, a fungicide specific against powdery mildews.

Fungicide, acaricide.

How it is made

Made by reaction of thiophosgene and quinoxaline-2,3-dithiol...

/It is manufactured/ by reaction of phosgene and 2,3-dimercapto-quinoxaline.

Preparation: Sasse et al, US 3141886 (1964 to Bayer), DE 1088965 (1960), BE 580478 (1958).

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 613-019-00-X

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2934.99Indicative HS code

Nucleic acids and their salts, other heterocyclic compounds, not elsewhere classified in heading 2934

World exports in 2024
$26.7B
+15.0% vs 2023, imports $26.3B
2019 to 2024
Top exporters
  1. Ireland26.3%
  2. China15.7%
  3. Singapore10.3%
Top importers
  1. United States24.5%
  2. Germany23.1%
  3. Japan4.5%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Thioquinox?

Thioquinox is a quinoxaline antifungal agent, a quinoxaline acaricide and a dithioloquinoxaline.

What is the CAS number of Thioquinox?

The CAS registry number of Thioquinox is 93-75-4.

What is the molecular formula and weight of Thioquinox?

The molecular formula of Thioquinox is C9H4N2S3 and its molar mass is 236.35 g/mol.

What is Thioquinox used for?

Good ovicide for control of spiders on ornamentals. Thioquinox is a non-systemic acaricide effective against eggs, a fungicide specific against powdery mildews. Fungicide, acaricide.

Is Thioquinox hazardous?

Thioquinox carries the GHS signal word "Warning". Main hazards: harmful if swallowed. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Thioquinox?

Thioquinox is usually classified under HS code 293499 (Nucleic acids and their salts, whether or not chemically defined, other heterocyclic…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Thioquinox?

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What is the price of Thioquinox?

Suppliers quote Thioquinox 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 Thioquinox

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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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