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Screening compounds

Clefma

Also known as (Z)-4-[(3E,5E)-3,5-bis[(2-chlorophenyl)methylidene]-4-oxopiperidin-1-yl]-4-oxobut-2-enoic acid

CAS 1246964-32-8Formula C23H17Cl2NO4Molar mass 442.30 g/molEC 808-474-8
GHS signal word: Warning. Pictograms: Harmful or irritant, Hazardous to the environment 1 supplier listed
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Clefma chemical structure, C23H17Cl2NO4, CAS 1246964-32-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1246964-32-8
Formula
C23H17Cl2NO4
Molar mass
442.30 g/mol
EC number
808-474-8
HS code
293339
Category
Screening compounds

What is Clefma?

Plain description, key identifiers and synonyms

Clefma is a chemical substance with the molecular formula C23H17Cl2NO4 and a molar mass of 442.30 g/mol. Its CAS registry number is 1246964-32-8. The IUPAC name is (Z)-4-[(3E,5E)-3,5-bis[(2-chlorophenyl)methylidene]-4-oxopiperidin-1-yl]-4-oxobut-2-enoic acid.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
(Z)-4-[(3E,5E)-3,5-bis[(2-chlorophenyl)methylidene]-4-oxopiperidin-1-yl]-4-oxobut-2-enoic acid
CAS number
1246964-32-8
EC number
808-474-8
Molecular formula
C23H17Cl2NO4
InChIKey
ABOUDPJRQGWQNW-GGDLZHBGSA-N
InChI
InChI=1S/C23H17Cl2NO4/c24-19-7-3-1-5-15(19)11-17-13-26(21(27)9-10-22(28)29)14-18(23(17)30)12-16-6-2-4-8-20(16)25/h1-12H,13-14H2,(H,28,29)/b10-9-,17-11+,18-12+
Canonical SMILES
O=C(O)C=CC(=O)N1CC(=Cc2ccccc2Cl)C(=O)C(=Cc2ccccc2Cl)C1
Isomeric SMILES
C\1N(C/C(=C\C2=CC=CC=C2Cl)/C(=O)/C1=C/C3=CC=CC=C3Cl)C(=O)/C=C\C(=O)O

Synonyms

  • (Z)-4-[(3E,5E)-3,5-bis[(2-chlorophenyl)methylidene]-4-oxopiperidin-1-yl]-4-oxobut-2-enoic acid

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
442.30 g/molcalc.
Exact mass
441.0535 Dacalc.
LogP (octanol/water)
4.51calc.
Topological polar surface area
74.68 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
4calc.
Heavy atoms
30calc.
Rings
3calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.09calc.
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=C1C(=Cc2ccccc2)CNCC1=Cc1ccccc1

O=C1C(=Cc2ccccc2)CNCC1=Cc1ccccc1

3 rings, 21 atoms, the 3,5-Bis(benzylidene)-4-piperidone ring system.

72 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.
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

Clefma suppliers

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

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  • Sun-shine Chemical
    China, WuhanUnclaimed profile
    ClefmaGrade, purity and minimum order on request
    Price on request
    View

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Where suppliers are based

1 supplier in 1 country

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Clefma 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

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 Clefma is traded under.

HS 2933.39Indicative HS code

Heterocyclic compounds containing an unfused pyridine ring (whether or not hydrogenated) in the structure…

World exports in 2024
$9.16B
−17.9% vs 2023, imports $10.6B
2019 to 2024
Top exporters
  1. China21.5%
  2. India * partner reported12.3%
  3. Ireland11.6%
Top importers
  1. Germany14.2%
  2. United States12.8%
  3. Brazil10.1%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Clefma?

Clefma is a chemical substance with the molecular formula C23H17Cl2NO4 and a molar mass of 442.30 g/mol. Its CAS registry number is 1246964-32-8. The IUPAC name is (Z)-4-[(3E,5E)-3,5-bis[(2-chlorophenyl)methylidene]-4-oxopiperidin-1-yl]-4-oxobut-2-enoic acid.

What is the CAS number of Clefma?

The CAS registry number of Clefma is 1246964-32-8.

What is the molecular formula and weight of Clefma?

The molecular formula of Clefma is C23H17Cl2NO4 and its molar mass is 442.30 g/mol.

What is Clefma used for?

Known uses and roles of Clefma include building blocks in research and laboratory and screening compounds in research and laboratory.

Is Clefma hazardous?

Clefma 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 Clefma?

Clefma is usually classified under HS code 293339 (Compounds containing an unfused pyridine ring (whether or not hydrogenated) in the…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Clefma?

CompoundList lists 1 supplier of Clefma in China. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Clefma?

Suppliers quote Clefma 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 Clefma

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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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