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Fungicides

Carboxin

Also known as Carboxine, Carbathiin, Vitavax

CAS 5234-68-4Formula C12H13NO2SMolar mass 235.31 g/molEC 226-031-1
GHS signal word: Warning. Pictograms: Harmful or irritant, Serious health hazard, Hazardous to the environment 38 suppliers listed
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Carboxin chemical structure, C12H13NO2S, CAS 5234-68-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Crystals from ethanol or methanol
Melting point
91.5 to 92.5
Density
1.7 g/mL
Flash point
203 °C
Solubility
In water, 147 mg/L at 20 °C
HS code
293499
Category
Fungicides
Illustrative photo, closed blue fibre drums on a pallet in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Carboxin?

Plain description, key identifiers and synonyms

Carboxin is an anilide obtained by formal condensation of the amino group of aniline with the carboxy group of 2-methyl-5,6-dihydro-1,4-oxathiine-3-carboxylic acid. A fungicide for control of bunts and smuts that is normally used as a seed treatment. It has a role as an EC 1.3.5.1 [succinate dehydrogenase (quinone)] inhibitor and an antifungal agrochemical. It is an anilide, a secondary carboxamide, an oxacycle, an organosulfur heterocyclic compound, an enamide and an anilide fungicide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
6-methyl-N-phenyl-2,3-dihydro-1,4-oxathiine-5-carboxamide
CAS number
5234-68-4 CAS number cross-checked
EC number
226-031-1
Molecular formula
C12H13NO2S
UNII
5A8K850HDE
MDL number
MFCD00055403
InChIKey
GYSSRZJIHXQEHQ-UHFFFAOYSA-N
InChI
InChI=1S/C12H13NO2S/c1-9-11(16-8-7-15-9)12(14)13-10-5-3-2-4-6-10/h2-6H,7-8H2,1H3,(H,13,14)
SMILES (canonical and isomeric)
CC1=C(SCCO1)C(=O)NC2=CC=CC=C2

Synonyms

  • Carboxine
  • Carbathiin
  • Vitavax
  • 2-Methyl-N-phenyl-5,6-dihydro-1,4-oxathiine-3-carboxamide
  • Oxatin
  • DCMO
  • Kisvax
  • Vitavax 75W
  • DMOC
  • Vitavax 100
  • Vitavax 735D
  • Kemikar
  • Vitaflo 250
  • Murganic
  • Vitaflow
  • Cerevax
  • Enhance
  • 5,6-Dihydro-2-methyl-N-phenyl-1,4-oxathiin-3-carboxamide
  • Cerevax Extra
  • Enhance Plus
  • Germate Plus
  • RTV Vitavax
  • Dual Murganic RPB
  • Vitavax 34
  • Flo pro v seed protectant
Show all 38 synonyms
  • 1,4-Oxathiin-3-carboxamide, 5,6-dihydro-2-methyl-N-phenyl-
  • 2,3-Dihydro-5-carboxanilido-6-methyl-1,4-oxathiin
  • 2,3-Dihydro-6-methyl-1,4-oxathiin-5-carboxanilide
  • 5,6-Dihydro-2-methyl-1,4-oxathiin-3-carboxanilide
  • 6-methyl-N-phenyl-2,3-dihydro-1,4-oxathiine-5-carboxamide
  • 5-Carboxanilido-2,3-dihydro-6-methyl-1,4-oxathiin
  • 2,3-Dihydro-6-methyl-5-phenylcarbamoyl-1,4-oxathiin
  • 5,6-Dihydro-2-methyl-3-carboxanilido-1,4-oxathiin
  • 1,4-Oxathiin, 2,3-dihydro-5-carboxanilido-6-methyl-
  • 1,4-Oxathiin-3-carboxanilide, 5,6-dihydro-2-methyl-
  • Fenoxan
  • V 4X
  • Pro-Gro

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 ethanol or methanolexp.
Melting point
91.5 to 92.5exp.
Density
1.7 g/mLexp.
Flash point
203 °Cexp.
Solubility
In water, 147 mg/L at 20 °Cexp.
Vapour pressure
1.5 × 10⁻⁷ mm Hg at 25 °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
235.31 g/molcalc.
Exact mass
235.0667 Dacalc.
LogP (octanol/water)
2.62calc.
Topological polar surface area
38.33 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
2calc.
Heavy atoms
16calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.25calc.
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, O=C(Nc1ccccc1)C1=COCCS1

O=C(Nc1ccccc1)C1=COCCS1

2 rings, 15 atoms.

12 other chemicals 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
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H317May cause an allergic skin reaction.
  • H373May cause damage to organs through prolonged or repeated exposure.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (12)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • 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

Carboxin suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 38 suppliers
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Where suppliers are based

38 suppliers in 9 countries

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Carboxin 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

Systemic fungicide. (Used for) seed treatment for control of smuts and bunts (particularly loose smut, Ustilago spp.), at 50-200 g/100 kg seed, on barley, wheat, and oats, seedling diseases (particularly Rhizoctonia spp.) of barley, wheat, oats, rice, cotton, peanuts, soya beans, vegetables, maize, sorghum, and other crops. The dimorphic forms do not differ in fungicidal activity.

Effective systemic fungicide that controls by seed treatment basidomycete type of fungi such as smuts of small grains & Rhizoctonia solani of ... sugar beets ... It is particularly effective in control of loose smut of small grains caused by ustilago species.

Seed treatment controls on smuts on barley, oats, wheat, and seedling diseases, such as Rhizoctonia solani, on barley, corn, cotton, oats, peanuts, rapeseed, rice sorghum, soybeans, wheat and other crops.

Use classes: Pesticides.

Pharmacological actions

  • Fungicides, Industrial

Roles

  • agrochemical
  • antifungal agent
  • antifungal agrochemical
  • antimicrobial agent
  • enzyme inhibitor
  • fungicide
  • pesticide

Functional uses

  • Biocide

How it is made

Carboxin is produced by reaction of 2-chloro-3-oxobutyricanilide with 2-mercaptoethanol, followed by acid-catalyzed ring closure with elimination of water.

By the reaction of alpha-chloroacetoacetanilide and 2-mercaptoethanol followed by acid catalyzed cyclization-dehydration.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 616-226-00-3

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Carboxin 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 Carboxin is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Carboxin?

Carboxin is an anilide obtained by formal condensation of the amino group of aniline with the carboxy group of 2-methyl-5,6-dihydro-1,4-oxathiine-3-carboxylic acid. A fungicide for control of bunts and smuts that is normally used as a seed treatment.

What is the CAS number of Carboxin?

The CAS registry number of Carboxin is 5234-68-4.

What is the molecular formula and weight of Carboxin?

The molecular formula of Carboxin is C12H13NO2S and its molar mass is 235.31 g/mol.

What is Carboxin used for?

Systemic fungicide. (Used for) seed treatment for control of smuts and bunts (particularly loose smut, Ustilago spp.), at 50-200 g/100 kg seed, on barley, wheat, and oats, seedling diseases (particularly Rhizoctonia spp.) of barley, wheat, oats, rice, cotton, peanuts, soya beans, vegetables, maize, sorghum, and other…

Is Carboxin hazardous?

Carboxin carries the GHS signal word "Warning". Main hazards: may cause an allergic skin reaction, may cause damage to organs through prolonged or repeated exposure, very toxic to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Carboxin?

Carboxin 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 Carboxin?

CompoundList lists 38 suppliers of Carboxin in China, United States, India, Canada and 5 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Carboxin in India?

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

What is the price of Carboxin?

Suppliers quote Carboxin 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 Carboxin

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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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