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Amines and amides

Potassium phthalimide

Also known as N-Potassium phthalimide, Phthalimide, potassium salt, Potassium phthalimidate

CAS 1074-82-4Formula C8H4KNO2Molar mass 185.22 g/molEC 214-046-6
GHS signal word: Warning. Pictograms: Harmful or irritant 29 suppliers listed
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Potassium phthalimide chemical structure, C8H4KNO2, CAS 1074-82-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1074-82-4
Formula
C8H4KNO2
Molar mass
185.22 g/mol
EC number
214-046-6
HS code
292519
Category
Amines and amides

What is Potassium phthalimide?

Plain description, key identifiers and synonyms

Potassium phthalimide is a chemical substance with the molecular formula C8H4KNO2 and a molar mass of 185.22 g/mol. Its CAS registry number is 1074-82-4. The IUPAC name is potassium isoindol-2-ide-1,3-dione.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
potassium isoindol-2-ide-1,3-dione
CAS number
1074-82-4 CAS number cross-checked
EC number
214-046-6
Molecular formula
C8H4KNO2
UNII
X6KKA27DIL
MDL number
MFCD00005887
InChIKey
FYRHIOVKTDQVFC-UHFFFAOYSA-M
InChI
InChI=1S/C8H5NO2.K/c10-7-5-3-1-2-4-6(5)8(11)9-7;/h1-4H,(H,9,10,11);/q;+1/p-1
SMILES (canonical and isomeric)
C1=CC=C2C(=C1)C(=O)[N-]C2=O.[K+]

Synonyms

  • N-Potassium phthalimide
  • Phthalimide, potassium salt
  • Potassium phthalimidate
  • 1H-Isoindole-1,3(2H)-dione, potassium salt
  • 1H-Isoindole-1,3(2H)-dione, potassium salt (1:1)
  • NPotassiophthalimide
  • Phthalimide, potassium salt (8CI)
  • 1HIsoindole1,3(2H)dione, potassium salt
  • Potassium 1,3-dioxoisoindolin-2-ide
  • N-Potassiophthalimide
  • potassium 1,3-dioxo-1,3-dihydroisoindol-2-ide
  • potassium 1,3-dioxo-2,3-dihydro-1H-isoindol-2-ide
  • phthalimide potassium
  • 1,3-Dihydro-1,3-dioxoisoindole potassium salt
  • Phthalimide potassium salt, 98%
  • potassium 1,3-dioxo-1,3-dihydr
  • (1,3-dioxoisoindolin-2-yl)potassium
  • (1,3-dioxoisoindolin-2-yl) potassium
  • 1,3-Dihydroisoindole-1,3-dione potassium salt
  • 2-potassio-2,3-dihydro-1H-isoindole-1,3-dione
  • 10.14272/Fyrhiovktdqvfc-uhfffaoysa-m.1
  • doi:10.14272/FYRHIOVKTDQVFC-UHFFFAOYSA-M.1
  • doi:10.14272/FYRHIOVKTDQVFC-UHFFFAOYSA-M.2
  • Phthalimide potassium salt, purum, >=99.0% (NT)

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
185.22 g/molcalc.
Exact mass
184.9879 Dacalc.
LogP (octanol/water)
-1.64calc.
Topological polar surface area
48.24 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
0calc.
Heavy atoms
12calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0calc.
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, O=C1NC(=O)c2ccccc21

O=C1NC(=O)c2ccccc21

2 rings, 11 atoms, the Phthalimide ring system.

2,700 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

Hazard statements

  • H315Causes skin irritation.
  • H319Causes serious eye irritation.
  • H335May cause respiratory irritation.
Precautionary statements (16)
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P271Use only outdoors or in a well-ventilated area.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P302 + P352If on skin: Wash with plenty of water.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P319Get medical help if you feel unwell.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • 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.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • 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

Potassium phthalimide suppliers

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

All 29 suppliers
29 of 29 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

29 suppliers in 7 countries

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Potassium phthalimide 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

Synthetic intermediate.

Roles

  • enzyme inhibitor

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

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

HS 2925.19Indicative HS code

Imides and their derivatives, salts thereof, other

World exports in 2024
$295M
+11.7% vs 2023, imports $348M
2019 to 2024
Top exporters
  1. China29.7%
  2. Japan22.7%
  3. United Kingdom10.0%
Top importers
  1. United States12.7%
  2. Brazil12.6%
  3. China10.5%
Reported customs values in USD, not prices.Full trade data

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

Frequently asked questions

Quick answers about Potassium phthalimide, based on the data on this page

What is Potassium phthalimide?

Potassium phthalimide is a chemical substance with the molecular formula C8H4KNO2 and a molar mass of 185.22 g/mol. Its CAS registry number is 1074-82-4. The IUPAC name is potassium isoindol-2-ide-1,3-dione.

What is the CAS number of Potassium phthalimide?

The CAS registry number of Potassium phthalimide is 1074-82-4.

What is the molecular formula and weight of Potassium phthalimide?

The molecular formula of Potassium phthalimide is C8H4KNO2 and its molar mass is 185.22 g/mol.

What is Potassium phthalimide used for?

Synthetic intermediate.

Is Potassium phthalimide hazardous?

Potassium phthalimide carries the GHS signal word "Warning". Main hazards: causes skin irritation, causes serious eye irritation, may cause respiratory irritation. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Potassium phthalimide?

Potassium phthalimide is usually classified under HS code 292519 (Imides and their derivatives, salts thereof, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Potassium phthalimide?

CompoundList lists 29 suppliers of Potassium phthalimide in India, China, United States, Canada and 3 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Potassium phthalimide in India?

11 suppliers in India list Potassium phthalimide on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Potassium phthalimide?

Suppliers quote Potassium phthalimide 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 Potassium phthalimide

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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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