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Herbicides

Chlorbufam

Also known as Chlorbupham, Chlorobufam, Grisemin

CAS 1967-16-4Formula C11H10ClNO2Molar mass 223.66 g/molEC 217-815-4
GHS hazard pictograms. Pictograms: Hazardous to the environment
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Chlorbufam chemical structure, C11H10ClNO2, CAS 1967-16-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Colorless crystals
Melting point
45 to 46
Density
Density 1.22 /Technical grade/
Solubility
In water, 540 mg/L at 20 °C
HS code
292429
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 Chlorbufam?

Plain description, key identifiers and synonyms

Chlorbufam is a carbamate ester.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
but-3-yn-2-yl N-(3-chlorophenyl)carbamate
CAS number
1967-16-4 CAS number cross-checked
EC number
217-815-4
Molecular formula
C11H10ClNO2
UNII
65W9D7691G
InChIKey
ULBXWWGWDPVHAO-UHFFFAOYSA-N
InChI
InChI=1S/C11H10ClNO2/c1-3-8(2)15-11(14)13-10-6-4-5-9(12)7-10/h1,4-8H,2H3,(H,13,14)
SMILES (canonical and isomeric)
CC(C#C)OC(=O)NC1=CC(=CC=C1)Cl

Synonyms

  • Chlorbupham
  • Chlorobufam
  • Grisemin
  • Grisin
  • BIPC
  • Chlorbufame
  • BICP
  • 3-Butynyl-m-chlorocarbanilate
  • BIPC (the herbicide)
  • 3-Butyn-2-ol, m-chlorocarbanilate
  • 1-Butyn-3-yl m-chlorophenylcarbamate
  • 1-Methyl-2-propynyl m-chlorocarbanilate
  • 1-Methylpropynyl 3-chlorophenylcarbamate
  • 1-Methyl-2-propynyl m-chlorophenylcarbamate
  • 1-Methylprop-2-ynyl 3-chlorocarbanilate
  • 3-Chlorophenylcarbamic acid 1-methylpropynyl ester
  • Butyn-1-ol-3-ester of m-chlorophenylcarbamic acid
  • 1-Methylprop-2-ynyl 3-chlorophenylcarbamate
  • 1-Methylpropynyl ester of 3-chlorophenylcarbamic acid
  • Carbanilic acid, m-chloro-, 1-methyl-2-propynyl ester
  • Isobutinyl-N-(3-chlorphenyl)-carbamat
  • Carbamic acid, (3-chlorophenyl)-, 1-methyl-2-propynyl ester
  • 3-Chlorphenyl-carbamidsaure-butin-(1)-yl(3)-ester
  • 1-butyn-3-yl 3-chlorophenylcarbamate
  • but-3-yn-2-yl N-(3-chlorophenyl)carbamate
Show all 33 synonyms
  • Chlorbufame [ISO-French]
  • but-3-yn-2-yl (3-chlorophenyl)carbamate
  • Chlorbufam 10 |Ig/mL in Ethyl acetate
  • 3-Butyn-2-yl m-chlorocarbanilate
  • Chlorbufam 10 microg/mL in Ethyl acetate
  • Chlorbufam, PESTANAL(R), analytical standard
  • 1-Methyl-2-propynyl 3-chlorophenylcarbamate #
  • Carbamic acid, N-(3-chlorophenyl)-, 1-methyl-2-propyn-1-yl ester

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
Colorless crystalsexp.
Melting point
45 to 46exp.
Density
Density 1.22 /Technical grade/exp.
Solubility
In water, 540 mg/L at 20 °Cexp.
Vapour pressure
2.1 m Pa /1.58 × 10⁻⁵ mm Hg/ at 20 °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
223.66 g/molcalc.
Exact mass
223.04 Dacalc.
LogP (octanol/water)
2.91calc.
Topological polar surface area
38.33 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
2calc.
Heavy atoms
15calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.18calc.
Formal charge
0calc.
Stereocentres
1calc.
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, c1ccccc1

c1ccccc1

1 ring, 6 atoms, the Benzene ring system.

485,677 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS classification
Hazard pictograms
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H411Toxic to aquatic life with long lasting effects.
Precautionary statements (3)
  • P273Avoid release to the environment.
  • 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

Chlorbufam suppliers

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Chlorbufam 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

Selective herbicide. Inhibits photosynthesis. Normally used in combination with other herbicides for pre-emergence control of grasses and broad-leaved weeds in onions, leeks, garlic, shallots, carrots, beet, spinach, sunflowers, and bulb flowers.

How it is made

Produced by reaction of 3-chlorophenyl isocyanate and 1-methylprop-2-yn-l-ol...

M-Chloroaniline + phosgene + 3-butyn-2-ol(phosgenation/isocyanate addition)

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 Chlorbufam is traded under.

HS 2924.29Indicative HS code

Cyclic amides (including cyclic carbamates) and their derivatives, salts thereof, other

World exports in 2024
$5.69B
−5.1% vs 2023, imports $5.8B
2019 to 2024
Top exporters
  1. China32.3%
  2. Switzerland * partner reported13.6%
  3. Norway * partner reported12.8%
Top importers
  1. United States15.9%
  2. Ireland15.8%
  3. Germany11.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Chlorbufam?

Chlorbufam is a carbamate ester.

What is the CAS number of Chlorbufam?

The CAS registry number of Chlorbufam is 1967-16-4.

What is the molecular formula and weight of Chlorbufam?

The molecular formula of Chlorbufam is C11H10ClNO2 and its molar mass is 223.66 g/mol.

What is Chlorbufam used for?

Selective herbicide. Inhibits photosynthesis. Normally used in combination with other herbicides for pre-emergence control of grasses and broad-leaved weeds in onions, leeks, garlic, shallots, carrots, beet, spinach, sunflowers, and bulb flowers.

Is Chlorbufam hazardous?

Chlorbufam has a GHS hazard classification. Main hazards: 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 Chlorbufam?

Chlorbufam is usually classified under HS code 292429 (Cyclic amides (including cyclic carbamates) and their derivatives, salts thereof, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Chlorbufam?

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What is the price of Chlorbufam?

Suppliers quote Chlorbufam 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 Chlorbufam

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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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