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Aromatic building blocks

Tolpentamide

Also known as tolpentamida, 1-Cyclopentyl-3-p-tolylsulfonylurea, tolpentamidum

CAS 1027-87-8Formula C13H18N2O3SMolar mass 282.37 g/molEC 669-112-0
GHS signal word: Warning. Pictograms: Harmful or irritant
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Tolpentamide chemical structure, C13H18N2O3S, CAS 1027-87-8
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
1027-87-8
Formula
C13H18N2O3S
Molar mass
282.37 g/mol
EC number
669-112-0
HS code
293590
Category
Aromatic building blocks

What is Tolpentamide?

Plain description, key identifiers and synonyms

Tolpentamide is a first-generation cyclopentyl-containing sulfonylurea with hypoglycemic activity. Tolpentamide was never marketed.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1-cyclopentyl-3-(4-methylphenyl)sulfonylurea
CAS number
1027-87-8 CAS number cross-checked
EC number
669-112-0
Molecular formula
C13H18N2O3S
UNII
4G278XM8KC
InChIKey
SHVCKTUQDUTJDT-UHFFFAOYSA-N
InChI
InChI=1S/C13H18N2O3S/c1-10-6-8-12(9-7-10)19(17,18)15-13(16)14-11-4-2-3-5-11/h6-9,11H,2-5H2,1H3,(H2,14,15,16)
SMILES (canonical and isomeric)
CC1=CC=C(C=C1)S(=O)(=O)NC(=O)NC2CCCC2

Synonyms

  • tolpentamida
  • 1-Cyclopentyl-3-p-tolylsulfonylurea
  • tolpentamidum
  • 1-cyclopentyl-3-(4-methylphenyl)sulfonylurea
  • 3-Cyclopentyl-1-(4-methylbenzenesulfonyl)urea
  • N-(4-Methylbenzolsulfonyl)-N'-cyclopentylharnstoff
  • N-(Cyclopentylcarbamoyl)-4-methylbenzene-1-sulfonamide
  • (cyclopentylamino)-N-[(4-methylphenyl)sulfonyl]carboxamide
  • 1-({[(cyclopentylamino)carbonyl]amino}sulfonyl)-4-methylbenzene

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
282.37 g/molcalc.
Exact mass
282.1038 Dacalc.
LogP (octanol/water)
1.93calc.
Topological polar surface area
75.27 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
3calc.
Heavy atoms
19calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.46calc.
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=C(NC1CCCC1)NS(=O)(=O)c1ccccc1

O=C(NC1CCCC1)NS(=O)(=O)c1ccccc1

2 rings, 18 atoms.

No other chemical in our database has 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

  • H319Causes serious eye irritation.
Precautionary statements (4)
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P305 + P351 + P338If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P337 + P317If eye irritation persists: Get medical help.

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

Tolpentamide suppliers

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Tolpentamide price

Indicative price range per kg from live supplier offers

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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

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 Tolpentamide is traded under.

HS 2935.90Indicative HS code

Sulphonamides, other

World exports in 2024
$5.64B
−11.0% vs 2023, imports $8.56B
2019 to 2024
Top exporters
  1. Ireland43.1%
  2. China12.0%
  3. India * partner reported9.5%
Top importers
  1. United States23.6%
  2. Slovenia19.1%
  3. Spain11.7%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Tolpentamide?

Tolpentamide is a first-generation cyclopentyl-containing sulfonylurea with hypoglycemic activity. Tolpentamide was never marketed.

What is the CAS number of Tolpentamide?

The CAS registry number of Tolpentamide is 1027-87-8.

What is the molecular formula and weight of Tolpentamide?

The molecular formula of Tolpentamide is C13H18N2O3S and its molar mass is 282.37 g/mol.

What is Tolpentamide used for?

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

Is Tolpentamide hazardous?

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

What is the HS code of Tolpentamide?

Tolpentamide is usually classified under HS code 293590 (Sulphonamides, other). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Tolpentamide?

Post a free request on CompoundList and suppliers of Tolpentamide will send you quotes. Your contact details stay private until you accept a quote.

What is the price of Tolpentamide?

Suppliers quote Tolpentamide 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 Tolpentamide

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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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