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Herbicides

Isopropalin

Also known as Paarlan, Isopropaline, 4-Isopropyl-2,6-dinitro-N,N-dipropylaniline

CAS 33820-53-0Formula C15H23N3O4Molar mass 309.37 g/molEC 251-690-7
GHS signal word: Warning. Pictograms: Flammable, Hazardous to the environment
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Isopropalin chemical structure, C15H23N3O4, CAS 33820-53-0
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
33820-53-0
Formula
C15H23N3O4
Appearance
Red-orange liquid
Solubility
In water at 25 °C, 0.1 mg/l. In acetone, hexane, benzene, chloroform, diethyl ether, ace…
HS code
292142
Category
Herbicides
Illustrative photo, an IBC tote of amber liquid in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Isopropalin?

Plain description, key identifiers and synonyms

Isopropalin is a C-nitro compound.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2,6-dinitro-4-propan-2-yl-N,N-dipropylaniline
CAS number
33820-53-0 CAS number cross-checked
EC number
251-690-7
Molecular formula
C15H23N3O4
UNII
52GZD1I41N
MDL number
MFCD00055306
InChIKey
NEKOXWSIMFDGMA-UHFFFAOYSA-N
InChI
InChI=1S/C15H23N3O4/c1-5-7-16(8-6-2)15-13(17(19)20)9-12(11(3)4)10-14(15)18(21)22/h9-11H,5-8H2,1-4H3
SMILES (canonical and isomeric)
CCCN(CCC)C1=C(C=C(C=C1[N+](=O)[O-])C(C)C)[N+](=O)[O-]

Synonyms

  • Paarlan
  • Isopropaline
  • 4-Isopropyl-2,6-dinitro-N,N-dipropylaniline
  • Cumidine, 2,6-dinitro-N,N-dipropyl-
  • 2,6-Dinitro-N,N-dipropylcumidine
  • Benzenamine, 4-(1-methylethyl)-2,6-dinitro-N,N-dipropyl-
  • 4-(1-Methylethyl)-2,6-dinitro-N,N-dipropylbenzenamine
  • 2,6-dinitro-4-propan-2-yl-N,N-dipropylaniline
  • 4-isopropyl-2,6-dinitro-N,N-dipropyl-aniline
  • Isopropaline [ISO-French]
  • 2,6-Dinitro-N,N-dipropyl-4-isopropylaniline
  • Aniline, 2,6-dinitro-N,N-dipropyl-p-isopropyl-
  • 2,6-dinitro-4-(propan-2-yl)-N,N-dipropylaniline
  • EL 179
  • N-(4-Isopropyl-2,6-dinitrophenyl)-N,N-dipropylamine #

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
Red-orange liquidexp.
Solubility
In water at 25 °C, 0.1 mg/l. In acetone, hexane, benzene, chloroform, diethyl ether, acetonitrile, and methanol, all > 1 kg/l at 25 °C.exp.
Vapour pressure
1.9 mPa at 30 °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
309.37 g/molcalc.
Exact mass
309.1689 Dacalc.
LogP (octanol/water)
4.25calc.
Topological polar surface area
89.52 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
8calc.
Heavy atoms
22calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.6calc.
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, 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 signal word
Warning
GHS02: Flammable
Flammable
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H226Flammable liquid and vapour.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (13)
  • P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
  • P233Keep container tightly closed.
  • P240Ground and bond container and receiving equipment.
  • P241Use explosion-proof electrical, ventilating and lighting equipment.
  • P242Use non-sparking tools.
  • P243Take action to prevent static discharges.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P303 + P361 + P353If on skin (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
  • P370 + P378In case of fire: Use appropriate media to extinguish.
  • P391Collect spillage.
  • P403 + P235Store in a well-ventilated place. Keep cool.
  • 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

Isopropalin suppliers

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Isopropalin 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

The active ingredient is no longer contained in any registered pesticide products ... "cancelled.".

Selective herbicide. Soil incorporated, preemergence for grasses, broadleaf weeds in transplant tobacco (flue/air cured).

How it is made

Made by the reaction of dipropylamine with 1-chloro-4-isopropyl-2,6-dinitrobenzene.

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 Isopropalin is traded under.

HS 2921.42Indicative HS code

Aniline derivatives and their salts

World exports in 2024
$495M
−2.5% vs 2023, imports $440M
2019 to 2024
Top exporters
  1. China69.8%
  2. India * partner reported19.6%
  3. Japan3.3%
Top importers
  1. Pakistan17.0%
  2. United Arab Emirates * partner reported12.7%
  3. Brazil10.9%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Isopropalin used for?

The active ingredient is no longer contained in any registered pesticide products ... "cancelled.". Selective herbicide. Soil incorporated, preemergence for grasses, broadleaf weeds in transplant tobacco (flue/air cured).

Is Isopropalin hazardous?

Isopropalin carries the GHS signal word "Warning". Main hazards: flammable liquid and vapour, 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.

Guides for buyers

Practical guides that help when you source, ship or handle Isopropalin

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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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