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Plant growth regulators

Phosphon

Also known as Chlorphonium chloride, Phosfon D, Phosphone D

CAS 115-78-6Formula C19H32Cl3PMolar mass 397.80 g/molEC 204-105-4
GHS signal word: Danger. Pictograms: Acute toxicity (severe)
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Phosphon chemical structure, C19H32Cl3P, CAS 115-78-6
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
White crystalline solid
Melting point
114 to 120
Solubility
SOL IN WATER, ACETONE, ETHANOL, ISOPROPYL ALCOHOL
HS code
293159
Category
Plant growth regulators
Illustrative photo, colourless crystals in a clear glass bottle on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Phosphon?

Plain description, key identifiers and synonyms

Chlorphonium chloride is an organic molecular entity.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
tributyl-[(2,4-dichlorophenyl)methyl]phosphanium chloride
CAS number
115-78-6 CAS number cross-checked
EC number
204-105-4
Molecular formula
C19H32Cl3P
UNII
KSE326Z112
InChIKey
IVHVNMLJNASKHW-UHFFFAOYSA-M
InChI
InChI=1S/C19H32Cl2P.ClH/c1-4-7-12-22(13-8-5-2,14-9-6-3)16-17-10-11-18(20)15-19(17)21;/h10-11,15H,4-9,12-14,16H2,1-3H3;1H/q+1;/p-1
SMILES (canonical and isomeric)
CCCC[P+](CCCC)(CCCC)CC1=C(C=C(C=C1)Cl)Cl.[Cl-]

Synonyms

  • Chlorphonium chloride
  • Phosfon D
  • Phosphone D
  • Fosfon D
  • Chlorphonium
  • Chlorfonium
  • CBBP
  • Phosfleur
  • 2,4-Dichlorobenzyltributylphosphonium chloride
  • Tributyl(2,4-dichlorobenzyl)phosphonium chloride
  • Phosphonium, tributyl(2,4-dichlorobenzyl)-, chloride
  • Phospon-d
  • Phosphon D
  • Phosfon
  • tributyl-[(2,4-dichlorophenyl)methyl]phosphanium, chloride
  • Phosphonium, tributyl((2,4-dichlorophenyl)methyl)-, chloride
  • Chlorfonium [ISO-French]
  • Phosphonium, tributyl[(2,4-dichlorophenyl)methyl]-, chloride
  • Tributyl chlorobenzylphosphonium
  • Phosfone D
  • Phosphan Solution
  • Tributyl (2,4-dichlorobenzyl) phosphonium chloride
  • Tributyl((2,4-dichlorophenyl)methyl)phosphonium chloride
  • tributyl[(2,4-dichlorophenyl)methyl]phosphanium chloride
  • Phosphonium, tributyl[(2,4-dichlorophenyl)methyl]-, chloride (1:1)

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
MILD AROMATIC ODORexp.
Melting point
114 to 120exp.
Solubility
SOL IN WATER, ACETONE, ETHANOL, ISOPROPYL ALCOHOLexp.

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
397.80 g/molcalc.
Exact mass
396.1307 Dacalc.
LogP (octanol/water)
4.92calc.
Topological polar surface area
0 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
0calc.
Rotatable bonds
11calc.
Heavy atoms
23calc.
Rings
1calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.68calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
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, 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
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)

Hazard statements

  • H301Toxic if swallowed.
  • H312Harmful in contact with skin.
  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
Precautionary statements (15)
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P317Get medical help.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P332 + P317If skin irritation occurs: Get medical help.
  • P337 + P317If eye irritation persists: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • 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

Phosphon suppliers

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Phosphon price

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Uses and applications

What the substance is used for, by industry and function

Plant growth regulator.

How it is made

Reaction of 2,4-dichlorobenzyl chloride with tributylphosphine. Us patent 3,268,323.

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 015-085-00-X

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2931.59Indicative HS code

Halogenated organo-phosphorous derivatives, other

World exports in 2024
$46.1M
+14.5% vs 2023, imports $88.5M
2022 to 2024
Top exporters
  1. China32.9%
  2. United States32.0%
  3. Germany8.4%
Top importers
  1. Brazil32.3%
  2. United States19.2%
  3. South Korea6.4%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

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

What is Phosphon?

Chlorphonium chloride is an organic molecular entity.

What is the CAS number of Phosphon?

The CAS registry number of Phosphon is 115-78-6.

What is the molecular formula and weight of Phosphon?

The molecular formula of Phosphon is C19H32Cl3P and its molar mass is 397.80 g/mol.

What is Phosphon used for?

Plant growth regulator.

Is Phosphon hazardous?

Phosphon carries the GHS signal word "Danger". Main hazards: toxic if swallowed, harmful in contact with skin, causes skin irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Phosphon?

Phosphon is usually classified under HS code 293159 (Halogenated organo-phosphorous derivatives, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Phosphon?

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What is the price of Phosphon?

Suppliers quote Phosphon 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 Phosphon

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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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