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Herbicides

Siduron

Also known as 1-(2-Methylcyclohexyl)-3-phenylurea, Tupersan, Trey

CAS 1982-49-6Formula C14H20N2OMolar mass 232.33 g/molEC 217-844-2
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Siduron chemical structure, C14H20N2O, CAS 1982-49-6
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White crystals
Melting point
135 °C
Density
1.08 at 25 °C/25 °C
Solubility
In water, 18 mg/L at 25 °C
HS code
292421
Category
Herbicides
Illustrative photo, colourless crystals beside an amber glass bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Siduron?

Plain description, key identifiers and synonyms

Siduron is a member of ureas.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1-(2-methylcyclohexyl)-3-phenylurea
CAS number
1982-49-6 CAS number cross-checked
EC number
217-844-2
Molecular formula
C14H20N2O
UNII
513S964LJO
InChIKey
JXVIIQLNUPXOII-UHFFFAOYSA-N
InChI
InChI=1S/C14H20N2O/c1-11-7-5-6-10-13(11)16-14(17)15-12-8-3-2-4-9-12/h2-4,8-9,11,13H,5-7,10H2,1H3,(H2,15,16,17)
SMILES (canonical and isomeric)
CC1CCCCC1NC(=O)NC2=CC=CC=C2

Synonyms

  • 1-(2-Methylcyclohexyl)-3-phenylurea
  • Tupersan
  • Trey
  • Urea, N-(2-methylcyclohexyl)-N'-phenyl-
  • Du Pont herbicide 1,318
  • Du Pont 1318
  • N-Phenyl-N'-(2-methylcyclohexyl)urea
  • Urea, 1-(2-methylcyclohexyl)-3-phenyl-
  • DuPont 1318
  • N-(2-Methylcyclohexyl)-N'-phenylurea
  • 1-(2-Methylcycohexyl)-3-phenylurea
  • N-(2-Methylcyclohexyl)-N'-phenylurea #
  • Siduron, PESTANAL(R), analytical standard
  • N-(2-methylcyclohexyl)(phenylamino)carboxamide

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 crystalsexp.
Odour
Odorlessexp.
Melting point
135 °Cexp.
Density
1.08 at 25 °C/25 °Cexp.
Solubility
In water, 18 mg/L at 25 °Cexp.
Vapour pressure
4.0 × 10⁻⁹ 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
232.33 g/molcalc.
Exact mass
232.1576 Dacalc.
LogP (octanol/water)
3.39calc.
Topological polar surface area
41.13 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
1calc.
Rotatable bonds
2calc.
Heavy atoms
17calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.5calc.
Formal charge
0calc.
Stereocentres
2calc.
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)NC1CCCCC1

O=C(Nc1ccccc1)NC1CCCCC1

2 rings, 16 atoms, the N-Cyclohexyl-N'-phenylurea ring system.

212 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS classification
Hazard pictograms

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

Siduron suppliers

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Siduron 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

Registered for use on golf courses, sod farms, and residential turf.

Used for preemergence control of annual grasses such as barnyardgrass, crabgrass, foxtail, in newly-seeded or established bentgrass (certain strains), bluegrass, orchardgrass, perennial ryegrass, redtop, smooth brome, zoysia.

Selective herbicide, absorbed by the roots, with translocation in the xylem. Used as preemergence control of Digitaria species and annual grass weeds in newly-seeded grass (at 2-6 kg a.i./ha) or established turf (at 8-12 kg/ha).

Functional uses

  • Biocide

How it is made

Siduron is produced by reaction of phenyl isocyanate with 2-methylcyclohexylamine.

Preparation: Luckenbaugh, BE 631289 (1963 to du Pont)

Regulatory status

Inventories, regulations and trade controls that list this substance

No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2924.21Indicative HS code

Ureines and their derivatives, salts thereof

World exports in 2024
$149M
+12.5% vs 2023, imports $208M
2019 to 2024
Top exporters
  1. Germany25.4%
  2. China14.4%
  3. Israel12.0%
Top importers
  1. Brazil28.2%
  2. United States14.0%
  3. Japan10.0%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Siduron?

Siduron is a member of ureas.

What is the CAS number of Siduron?

The CAS registry number of Siduron is 1982-49-6.

What is the molecular formula and weight of Siduron?

The molecular formula of Siduron is C14H20N2O and its molar mass is 232.33 g/mol.

What is Siduron used for?

Registered for use on golf courses, sod farms, and residential turf. Used for preemergence control of annual grasses such as barnyardgrass, crabgrass, foxtail, in newly-seeded or established bentgrass (certain strains), bluegrass, orchardgrass, perennial ryegrass, redtop, smooth brome, zoysia.

Is Siduron hazardous?

No GHS hazard classification for Siduron is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Siduron?

Siduron is usually classified under HS code 292421 (Ureines and their derivatives, salts thereof). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Siduron?

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What is the price of Siduron?

Suppliers quote Siduron 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 Siduron

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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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