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Herbicides

Lenacil

Also known as Venzar, 3-Cyclohexyl-5,6-trimethyleneuracil, Du Pont 634

CAS 2164-08-1Formula C13H18N2O2Molar mass 234.30 g/molEC 218-499-0
GHS signal word: Warning. Pictograms: Serious health hazard, Hazardous to the environment 7 suppliers listed
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Lenacil chemical structure, C13H18N2O2, CAS 2164-08-1
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
2164-08-1
Formula
C13H18N2O2
Molar mass
234.30 g/mol
EC number
218-499-0
HS code
293359
Category
Herbicides

What is Lenacil?

Plain description, key identifiers and synonyms

Lenacil is a cyclopentapyrimidine that is 6,7-dihydro-1H-cyclopenta[d]pyrimidine-2,4(3H,5H)-dione substituted by a cyclohexyl group at position 3. It has a role as a herbicide, an agrochemical, a xenobiotic and an environmental contaminant.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
3-cyclohexyl-1,5,6,7-tetrahydrocyclopenta[d]pyrimidine-2,4-dione
CAS number
2164-08-1 CAS number cross-checked
EC number
218-499-0
Molecular formula
C13H18N2O2
UNII
X58DK6S8KX
MDL number
MFCD00055395
InChIKey
ZTMKADLOSYKWCA-UHFFFAOYSA-N
InChI
InChI=1S/C13H18N2O2/c16-12-10-7-4-8-11(10)14-13(17)15(12)9-5-2-1-3-6-9/h9H,1-8H2,(H,14,17)
SMILES (canonical and isomeric)
C1CCC(CC1)N2C(=O)C3=C(CCC3)NC2=O

Synonyms

  • Venzar
  • 3-Cyclohexyl-5,6-trimethyleneuracil
  • Du Pont 634
  • 3-Cyclohexyl-6,7-dihydro-1H-cyclopentapyrimidine-2,4(3H,5H)-dione
  • 3-cyclohexyl-1,5,6,7-tetrahydrocyclopenta[d]pyrimidine-2,4-dione
  • 3-Cyclohexyl-1,5,6,7-tetrahydrocyclopentapyrimidine-2,4(3H)-dione
  • hexylure
  • 3-cyclohexyl-1,5,6,7-tetrahydrocyclopenta(d)pyrimidine-2,4-dione
  • Elbatan
  • Hexilure
  • Buracyl
  • Adol (pesticide)
  • Herbicide 634
  • Uracil 634
  • Lenacile
  • Experimental herbicide 634
  • 3-cyclohexyl-6,7-dihydro-1H-cyclopenta[d]pyrimidine-2,4(3H,5H)-dione
  • 3-Cyclohexyl-5,6-trimethylenuracil
  • 1H-Cyclopentapyrimidine-2,4(3H,5H)-dione, 6,7-dihydro-3-cyclohexyl-
  • 3-Cyclohexyl-6,7-dihydro-1H-cyclopentapyrimidine-2,4-(3H,5H)-dione
  • 1H-Cyclopentapyrimidine-2,4(3H,5H)-dione, 3-cyclohexyl-6,7-dihydro-
  • Vizor
  • Lenacile [ISO-French]
  • Cambridge id 5278276
  • Lenacil 10 |Ig/mL in Acetonitrile
Show all 31 synonyms
  • 6,7-Dihydro-3-cyclohexyl-1H-cyclopentapyrimidine-2,4(3H,5H)-dione
  • Lenacil 10 microg/mL in Acetonitrile
  • Lenacil 100 |Ig/mL in Acetonitrile
  • Lenacil 100 microg/mL in Acetonitrile
  • Sdccgmls-0034596.p002
  • Lenacil, PESTANAL(R), analytical standard

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

No measured properties are recorded for this substance yet. Ask suppliers for a technical data sheet.

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
234.30 g/molcalc.
Exact mass
234.1368 Dacalc.
LogP (octanol/water)
1.53calc.
Topological polar surface area
54.86 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
1calc.
Heavy atoms
17calc.
Rings
3calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.69calc.
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=c1[nH]c2c(c(=O)n1C1CCCCC1)CCC2

O=c1[nH]c2c(c(=O)n1C1CCCCC1)CCC2

3 rings, 17 atoms. This chemical is the scaffold itself.

8 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Warning
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H351Suspected of causing cancer.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (7)
  • P203Obtain, read and follow all safety instructions before use.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P318If exposed or concerned, get medical advice.
  • P391Collect spillage.
  • P405Store locked up.
  • 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

Lenacil suppliers

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

All 7 suppliers
7 of 7 offers

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

7 suppliers in 4 countries

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Lenacil price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

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Uses and applications

What the substance is used for, by industry and function

Use classes: Pesticides, Pharmaceuticals.

Roles

  • agrochemical
  • environmental contaminant
  • herbicide
  • pesticide
  • xenobiotic

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 613-320-00-6

Health and food

  • EU Cosmetics Regulation Annex II, prohibited in cosmetics
    Name: Lenacil (ISO), 3-cyclohexyl-6,7-dihydro-1H-cyclopenta[d]pyrimidine-2,4(3H,5H)-dione, Ref no: 1590, Annex ref: II/1590

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2933.59Indicative HS code

Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring, other

World exports in 2024
$18.4B
+10.5% vs 2023, imports $24.8B
2019 to 2024
Top exporters
  1. Ireland43.6%
  2. Switzerland * partner reported26.3%
  3. China7.9%
Top importers
  1. Slovenia30.3%
  2. United States30.1%
  3. Germany15.3%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Lenacil?

Lenacil is a cyclopentapyrimidine that is 6,7-dihydro-1H-cyclopenta[d]pyrimidine-2,4(3H,5H)-dione substituted by a cyclohexyl group at position 3. It has a role as a herbicide, an agrochemical, a xenobiotic and an environmental contaminant.

What is the CAS number of Lenacil?

The CAS registry number of Lenacil is 2164-08-1.

What is the molecular formula and weight of Lenacil?

The molecular formula of Lenacil is C13H18N2O2 and its molar mass is 234.30 g/mol.

What is Lenacil used for?

Use classes: Pesticides, Pharmaceuticals.

Is Lenacil hazardous?

Lenacil carries the GHS signal word "Warning". Main hazards: suspected of causing cancer, very toxic to aquatic life, very toxic 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 Lenacil?

Lenacil is usually classified under HS code 293359 (Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Lenacil?

CompoundList lists 7 suppliers of Lenacil in France, United States, Hong Kong and Ukraine. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Lenacil?

Suppliers quote Lenacil 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 Lenacil

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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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