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Heterocyclic building blocks

Pirprofen

Also known as Rengasil, Pirprofene, Pirprofeno

CAS 31793-07-4Formula C13H14ClNO2Molar mass 251.71 g/molEC 250-805-8
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Pirprofen chemical structure, C13H14ClNO2, CAS 31793-07-4
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
31793-07-4
Formula
C13H14ClNO2
Molar mass
251.71 g/mol
EC number
250-805-8
HS code
293399
Category
Heterocyclic building blocks

What is Pirprofen?

Plain description, key identifiers and synonyms

Pirprofen is a pyrroline.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
2-[3-chloro-4-(2,5-dihydropyrrol-1-yl)phenyl]propanoic acid
CAS number
31793-07-4 CAS number cross-checkedOther or deprecated CAS: 46801-03-0
EC number
250-805-8
Molecular formula
C13H14ClNO2
UNII
T7KN291890
InChIKey
PIDSZXPFGCURGN-UHFFFAOYSA-N
InChI
InChI=1S/C13H14ClNO2/c1-9(13(16)17)10-4-5-12(11(14)8-10)15-6-2-3-7-15/h2-5,8-9H,6-7H2,1H3,(H,16,17)
SMILES (canonical and isomeric)
CC(C1=CC(=C(C=C1)N2CC=CC2)Cl)C(=O)O

Synonyms

  • Rengasil
  • Pirprofene
  • Pirprofeno
  • racemic pirprofen
  • Pirprofenum
  • Seflenyl
  • Rangasil 400
  • SU 21524
  • 3-Chloro-4-(3-pyrrolin-1-yl)hydratropic acid
  • Hydratropic acid, 3-chloro-4-(3-pyrrolin-1-yl)-
  • 2-(3-chloro-4-(2,5-dihydro-1H-pyrrol-1-yl)phenyl)propanoic acid
  • 2-[3-chloro-4-(2,5-dihydro-1H-pyrrol-1-yl)phenyl]propanoic acid
  • 2-(3-chloro-4-(3-pyrroli-1-yl)phenyl)propionic acid
  • 2-[3-chloro-4-(2,5-dihydropyrrol-1-yl)phenyl]propanoic acid
  • Benzeneacetic acid, 3-chloro-4-(2,5-dihydro-1H-pyrrol-1-yl)-alpha-methyl-
  • (+/-)-Pirprofen
  • Pirprofen (USAN/INN)
  • 5-20-04-00276 (Beilstein Handbook Reference)
  • 2-(3-Chloro-4-(3-pyrrolin-1-yl)phenyl)propionic acid
  • 2-(3-Chloro-4-(2,5-dihydropyrrol-1-yl)-phenyl)propanoic 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
251.71 g/molcalc.
Exact mass
251.0713 Dacalc.
LogP (octanol/water)
2.9calc.
Topological polar surface area
40.54 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
2calc.
Rotatable bonds
3calc.
Heavy atoms
17calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.31calc.
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, C1=CCN(c2ccccc2)C1

C1=CCN(c2ccccc2)C1

2 rings, 11 atoms, the 1-Phenyl-2,5-dihydro-1H-pyrrole ring system.

25 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

No GHS hazard classification is recorded for this substance yet. That does not mean it is harmless.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Pirprofen suppliers

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Pirprofen 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

Use classes: Pharmaceuticals.

Pharmacological actions

  • Anti-Inflammatory Agents, Non-Steroidal

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 Pirprofen is traded under.

HS 2933.99Indicative HS code

Heterocyclic compounds with nitrogen hetero-atom(s) only, other

World exports in 2024
$12.1B
−31.0% vs 2023, imports $28.8B
2019 to 2024
Top exporters
  1. China30.5%
  2. India * partner reported16.3%
  3. Ireland9.0%
Top importers
  1. Slovenia31.7%
  2. Italy24.2%
  3. United States5.0%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Pirprofen?

Pirprofen is a pyrroline.

What is the CAS number of Pirprofen?

The CAS registry number of Pirprofen is 31793-07-4. Other or deprecated CAS numbers: 46801-03-0.

What is the molecular formula and weight of Pirprofen?

The molecular formula of Pirprofen is C13H14ClNO2 and its molar mass is 251.71 g/mol.

What is Pirprofen used for?

Use classes: Pharmaceuticals.

Is Pirprofen hazardous?

No GHS hazard classification for Pirprofen is recorded on CompoundList yet. That does not prove it is safe. Always read the supplier safety data sheet.

What is the HS code of Pirprofen?

Pirprofen is usually classified under HS code 293399 (Heterocyclic compounds with nitrogen hetero-atom(s) only, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Pirprofen?

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What is the price of Pirprofen?

Suppliers quote Pirprofen 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 Pirprofen

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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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