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Herbicides

Terbacil

Also known as Turbacil, Sinbar, Geonter

CAS 5902-51-2Formula C9H13ClN2O2Molar mass 216.67 g/molEC 227-595-1
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 5 suppliers listed
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Terbacil chemical structure, C9H13ClN2O2, CAS 5902-51-2
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White crystalline solid
Melting point
175 to 177
Boiling point
Sublimation begins below the melting point
Density
1.34 g/cm³ at 25 °C
Solubility
In water, 710 mg/L at 25 °C
HS code
293359
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 Terbacil?

Plain description, key identifiers and synonyms

Terbacil is an organohalogen compound and a member of pyrimidines.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
3-tert-butyl-5-chloro-6-methyl-1H-pyrimidine-2,4-dione
CAS number
5902-51-2 CAS number cross-checked
EC number
227-595-1
Molecular formula
C9H13ClN2O2
UNII
S0017J6E25
InChIKey
NBQCNZYJJMBDKY-UHFFFAOYSA-N
InChI
InChI=1S/C9H13ClN2O2/c1-5-6(10)7(13)12(8(14)11-5)9(2,3)4/h1-4H3,(H,11,14)
SMILES (canonical and isomeric)
CC1=C(C(=O)N(C(=O)N1)C(C)(C)C)Cl

Synonyms

  • Turbacil
  • Sinbar
  • Geonter
  • 3-tert-Butyl-5-chloro-6-methyluracil
  • Compound 732
  • Du Pont 732
  • Du Pont herbicide 732
  • 3-tert-butyl-5-chloro-6-methyl-1,2,3,4-tetrahydropyrimidine-2,4-dione
  • Experimental herbicide 732
  • 3-tert-butyl-5-chloro-6-methyl-1H-pyrimidine-2,4-dione
  • Uracil, 3-tert-butyl-5-chloro-6-methyl-
  • 5-Chloro-3-tert-butyl-6-methyluracil
  • 3-t-Butyl-5-chloro-6-methyluracil
  • 5-Chloro-3-(1,1-dimethylethyl)-6-methyl-2,4(1H,3H)-pyrimidinedione
  • 2,4(1H,3H)-Pyrimidinedione, 5-chloro-3-(1,1-dimethylethyl)-6-methyl-
  • terbacyl
  • 3-tert.Butyl-5-chlor-6-methyluracil
  • 3-(tert-Butyl)-5-chloro-6-methylpyrimidine-2,4(1H,3H)-dione
  • 3-tert-butyl-5-chloro-6-methylpyrimidine-2,4(1H,3H)-dione
  • Geonter,
  • Herbicide 732
  • Sinbar 80W (Salt/Mix)
  • 5-24-07-00036 (Beilstein Handbook Reference)
  • Terbacil 10 |Ig/mL in Isooctane
  • Terbacil 10 microg/mL in Isooctane
Show all 28 synonyms
  • Terbacil, PESTANAL(R), analytical standard
  • 5-Chloro-3-(1,1-dimethylethyl)-6-methyl-pyrimidinedione
  • 3-tert-Butyl-5-chloro-6-methyl-2,4(1H,3H)-pyrimidinedione #

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 crystalline solidexp.
Odour
Odorlessexp.
Melting point
175 to 177exp.
Boiling point
Sublimation begins below the melting pointexp.
Density
1.34 g/cm³ at 25 °Cexp.
Solubility
In water, 710 mg/L at 25 °Cexp.
Vapour pressure
4.7 × 10⁻⁷ mm Hg at 29.5 °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
216.67 g/molcalc.
Exact mass
216.0666 Dacalc.
LogP (octanol/water)
1.25calc.
Topological polar surface area
54.86 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
14calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.56calc.
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=c1cc[nH]c(=O)[nH]1

O=c1cc[nH]c(=O)[nH]1

1 ring, 8 atoms, the Uracil ring system.

2,933 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.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
  • H412Harmful to aquatic life with long lasting effects.
Precautionary statements (7)
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P273Avoid release to the environment.
  • P301 + P317If swallowed: Get medical help.
  • P330Rinse mouth.
  • 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

Terbacil suppliers

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

All 5 suppliers
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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

5 suppliers in 4 countries

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Terbacil 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

Herbicides (uracil herbicides).

Used for selective control of many annual and some perennial weeds.

Herbicide.

Use classes: Pharmaceuticals.

Functional uses

  • Biocide

How it is made

Terbacil is produced by reaction of tert-butyl isocyanate with methyl 3-aminocrotonate, followed by cyclization and chlorination.

Terbacil may be made by the chlorination of 3-tert-butyl-6-methyluracil.

T-Butylamine + sodium cyanate + ethyl acetoacetate + chlorine (cyanate addition/condensation/chlorination)

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 Terbacil 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 Terbacil is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Terbacil?

Terbacil is an organohalogen compound and a member of pyrimidines.

What is the CAS number of Terbacil?

The CAS registry number of Terbacil is 5902-51-2.

What is the molecular formula and weight of Terbacil?

The molecular formula of Terbacil is C9H13ClN2O2 and its molar mass is 216.67 g/mol.

What is Terbacil used for?

Herbicides (uracil herbicides). Used for selective control of many annual and some perennial weeds. Herbicide. Use classes: Pharmaceuticals.

Is Terbacil hazardous?

Terbacil carries the GHS signal word "Warning". Main hazards: harmful if swallowed, 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 Terbacil?

Terbacil 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 Terbacil?

CompoundList lists 5 suppliers of Terbacil in China, Hong Kong, Singapore and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Terbacil?

Suppliers quote Terbacil 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 Terbacil

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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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