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Herbicides

Hexazinone

Also known as Velpar, 3-Cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione, Brushkiller

CAS 51235-04-2Formula C12H20N4O2Molar mass 252.32 g/molEC 257-074-4
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 98 suppliers listed
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Hexazinone chemical structure, C12H20N4O2, CAS 51235-04-2
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Crystals
Melting point
117.2 °C
Boiling point
Decomposes
Density
1.25
Solubility
In water, 3.3 × 10⁺⁴ mg/L at 25 °C
HS code
293369
Category
Herbicides
Illustrative photo, assorted laboratory chemical bottles and jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Hexazinone?

Plain description, key identifiers and synonyms

Hexazinone is a member of 1,3,5-triazines.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4-dione
CAS number
51235-04-2 CAS number cross-checked
EC number
257-074-4
Molecular formula
C12H20N4O2
UNII
Y51727MR1Y
MDL number
MFCD00055526
InChIKey
CAWXEEYDBZRFPE-UHFFFAOYSA-N
InChI
InChI=1S/C12H20N4O2/c1-14(2)10-13-11(17)16(12(18)15(10)3)9-7-5-4-6-8-9/h9H,4-8H2,1-3H3
SMILES (canonical and isomeric)
CN1C(=NC(=O)N(C1=O)C2CCCCC2)N(C)C

Synonyms

  • Velpar
  • 3-Cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione
  • Brushkiller
  • Gridball
  • Velpar L
  • Velpar weed killer
  • 3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4-dione
  • DPX 3674
  • 1,3,5-Triazine-2,4(1H,3H)-dione, 3-cyclohexyl-6-(dimethylamino)-1-methyl-
  • SHA 107201
  • 3-Cyclohexyl-1-methyl-6-(dimethylamino)-s-trazine-2,4(1H,3H)-dione
  • 3-Cyclohexyl-6-(dimethylamino)-1-methyl-s-triazine-2,4(1H,3H)-dione
  • 3-cyclohexyl-6-(dimethylamino)-1-methyl-1,2,3,4-tetrahydro-1,3,5-triazine-2,4-dione
  • Hexazinon
  • s-Triazine-2,4(1H,3H)-dione, 3-cyclohexyl-6-(dimethylamino)-1-methyl-
  • Hexazinone Standard
  • Hexazinone (Velpar)
  • 3-Cyclohexyl-6-dimethylamino-1-methyl-1,2,3,4-tetrahydro-1,3,5-triazine-2,4-dione
  • 5-26-10-00171 (Beilstein Handbook Reference)
  • 3-cyclohexyl-6-dimethylamino-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione
  • Hexazinone 1000 microg/mL in Toluene
  • Hexazinone 10 microg/mL in Acetonitrile
  • Hexazinone 100 microg/mL in Acetonitrile
  • Hexazinone, PESTANAL(R), analytical standard
  • 1-methyl-3-cyclohexyl-6-dimethylamino-s-triazine-2,4(1H,3H)-dione
Show all 26 synonyms
  • 3-Cyclohexy-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione

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
Crystalsexp.
Odour
Odorlessexp.
Melting point
117.2 °Cexp.
Boiling point
Decomposesexp.
Density
1.25exp.
Solubility
In water, 3.3 × 10⁺⁴ mg/L at 25 °Cexp.
Vapour pressure
2.25 × 10⁻⁷ mm Hg at 25 deg (extrapolated)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
252.32 g/molcalc.
Exact mass
252.1586 Dacalc.
LogP (octanol/water)
0.51calc.
Topological polar surface area
60.13 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
2calc.
Heavy atoms
18calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.75calc.
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=c1nc[nH]c(=O)n1C1CCCCC1

O=c1nc[nH]c(=O)n1C1CCCCC1

2 rings, 14 atoms.

11 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
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H302Harmful if swallowed.
  • H319Causes serious eye irritation.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (11)
  • 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.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P330Rinse mouth.
  • P337 + P317If eye irritation persists: Get medical help.
  • 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

Hexazinone suppliers

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

All 98 suppliers
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Where suppliers are based

98 suppliers in 9 countries

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Hexazinone 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

Herbicide.

Post emergence contact herbicide effective against many annual and biennial weeds and, except for Sorghum halepense, most perennial weeds.

Usage areas include plantations of coniferous trees, railroad right of ways, utilities, pipelines, petroleum tanks, drainage ditches, and sugar, and alfalfa.

Use classes: Herbicides, Pesticides.

Pharmacological actions

  • Herbicides

Functional uses

  • Biocide

How it is made

Hexazinone is produced by reaction of cyanoamine with methyl chloroformate, followed by methylation, and treatment with dimethylamine and cyclohexyl isocyanate.

Preparation: Netherlands patent 7307218, J. J. Fuchs, J. B. Wommack, United States of America patent 3850924, K. Lin, United States of America patent 3983116 (1973, 1974, 1976 all to DuPont).

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 613-132-00-4

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 Hexazinone is traded under.

HS 2933.69Indicative HS code

Compounds containing an unfused triazine ring (whether or not hydrogenated) in the…

World exports in 2024
$2.46B
+1.8% vs 2023, imports $2.44B
2019 to 2024
Top exporters
  1. China53.6%
  2. Germany11.5%
  3. India * partner reported8.4%
Top importers
  1. United States13.5%
  2. Brazil9.6%
  3. Germany9.5%

* Partner reported figures, a lower bound.

Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Hexazinone?

Hexazinone is a member of 1,3,5-triazines.

What is the CAS number of Hexazinone?

The CAS registry number of Hexazinone is 51235-04-2.

What is the molecular formula and weight of Hexazinone?

The molecular formula of Hexazinone is C12H20N4O2 and its molar mass is 252.32 g/mol.

What is Hexazinone used for?

Herbicide. Post emergence contact herbicide effective against many annual and biennial weeds and, except for Sorghum halepense, most perennial weeds. Usage areas include plantations of coniferous trees, railroad right of ways, utilities, pipelines, petroleum tanks, drainage ditches, and sugar, and alfalfa.

Is Hexazinone hazardous?

Hexazinone carries the GHS signal word "Warning". Main hazards: harmful if swallowed, causes serious eye irritation, very toxic to aquatic life. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Hexazinone?

Hexazinone is usually classified under HS code 293369 (Compounds containing an unfused triazine ring (whether or not hydrogenated) in the…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Hexazinone?

CompoundList lists 98 suppliers of Hexazinone in China, Brazil, United States, India 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 Hexazinone in India?

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

What is the price of Hexazinone?

Suppliers quote Hexazinone 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 Hexazinone

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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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