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Antibiotics and anti-infectives

Parbendazole

Also known as Verminum, Worm Guard, PBDZ

CAS 14255-87-9Formula C13H17N3O2Molar mass 247.30 g/molEC 238-133-3
GHS signal word: Warning. Pictograms: Harmful or irritant, Serious health hazard 6 suppliers listed
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Parbendazole chemical structure, C13H17N3O2, CAS 14255-87-9
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Crystals
Melting point
255 to 257.2
Solubility
Less than 1 mg/mL at 64 °F
HS code
293399
Category
Antibiotics and anti-infectives
Illustrative photo, closed white HDPE bottles and amber jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Parbendazole?

Plain description, key identifiers and synonyms

Parbendazole is a member of the class of benzimidazoles that is 1H-benzimidazole substituted by (methoxycarbonyl)amino and butyl groups at positions 2 and 5, respectively. It is a potent inhibitor of microtubule assembly and also exhibits anthelminthic activity. It has a role as an anthelminthic drug, an antinematodal drug, an antineoplastic agent and a microtubule-destabilising agent. It is a member of benzimidazoles and a carbamate ester.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
methyl N-(6-butyl-1H-benzimidazol-2-yl)carbamate
CAS number
14255-87-9 CAS number cross-checked
EC number
238-133-3
Molecular formula
C13H17N3O2
UNII
N4X8WVX2UG
MDL number
MFCD00864534
InChIKey
YRWLZFXJFBZBEY-UHFFFAOYSA-N
InChI
InChI=1S/C13H17N3O2/c1-3-4-5-9-6-7-10-11(8-9)15-12(14-10)16-13(17)18-2/h6-8H,3-5H2,1-2H3,(H2,14,15,16,17)
SMILES (canonical and isomeric)
CCCCC1=CC2=C(C=C1)N=C(N2)NC(=O)OC

Synonyms

  • Verminum
  • Worm Guard
  • PBDZ
  • Parbendazol
  • Helatac
  • Parbendazolum
  • SK&F 29044
  • Methyl 5-butyl-2-benzimidazolecarbamate
  • Carbamic acid, (5-butyl-1H-benzimidazol-2-yl)-, methyl ester
  • 5-Butyl-2-(carbomethoxyamino)benzimidazole
  • SK&F-29044
  • 2-Benzimidazolecarbamic acid, 5-butyl-, methyl ester
  • (4-Butyl-1H-benzimidazol-2-yl)-carbamic acid methyl ester
  • Methyl (5-butyl-1H-benzo[d]imidazol-2-yl)carbamate
  • Helmatac
  • SKF 29044
  • methyl N-(6-butyl-1H-benzimidazol-2-yl)carbamate
  • 5-Butyl-2-benzimidazolecarbamic acid methyl ester
  • methyl ~{N}-(5-butyl-1~{H}-benzimidazol-2-yl)carbamate
  • Parbendazole free base
  • Parbendazole?
  • 14255-87-9 (free base)
  • Parbendazole (Standard)
  • N-(Butyl-5, benzimidazolyl)-2, carbamate de methyle
  • Methyl 5(6)-butyl-2-benzimidazolecarbamate
Show all 26 synonyms
  • Parbendazole (USAN/INN)

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

Physical form
Crystalsexp.
Melting point
255 to 257.2exp.
Solubility
Less than 1 mg/mL at 64 °Fexp.

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
247.30 g/molcalc.
Exact mass
247.1321 Dacalc.
LogP (octanol/water)
3.08calc.
Topological polar surface area
67.01 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
3calc.
Rotatable bonds
4calc.
Heavy atoms
18calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.39calc.
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, c1ccc2[nH]cnc2c1

c1ccc2[nH]cnc2c1

2 rings, 9 atoms, the Benzimidazole ring system.

8,995 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
GHS08: Serious health hazard
Serious health hazard

Hazard statements

  • H302Harmful if swallowed.
  • H361Suspected of damaging fertility or the unborn child.
Precautionary statements (9)
  • P203Obtain, read and follow all safety instructions before use.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P317If swallowed: Get medical help.
  • P318If exposed or concerned, get medical advice.
  • P330Rinse mouth.
  • 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

Parbendazole suppliers

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

All 6 suppliers
6 of 6 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

6 suppliers in 2 countries

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Parbendazole 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

Pharmacological actions

  • Antinematodal Agents

Roles

  • anthelminthic drug
  • antiinfective agent
  • antimitotic
  • antinematodal drug
  • antineoplastic agent
  • antiparasitic agent
  • microtubule-destabilising agent
  • nematicide
  • pesticide
  • pharmaceutical
  • tubulin modulator

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 Parbendazole 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 Parbendazole is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Parbendazole?

Parbendazole is a member of the class of benzimidazoles that is 1H-benzimidazole substituted by (methoxycarbonyl)amino and butyl groups at positions 2 and 5, respectively. It is a potent inhibitor of microtubule assembly and also exhibits anthelminthic activity.

What is the CAS number of Parbendazole?

The CAS registry number of Parbendazole is 14255-87-9.

What is the molecular formula and weight of Parbendazole?

The molecular formula of Parbendazole is C13H17N3O2 and its molar mass is 247.30 g/mol.

What is Parbendazole used for?

Known uses and roles of Parbendazole include anthelminthic drug, antiinfective agent, antimitotic, antinematodal drug, antineoplastic agent and 7 more.

Is Parbendazole hazardous?

Parbendazole carries the GHS signal word "Warning". Main hazards: harmful if swallowed, suspected of damaging fertility or the unborn child. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Parbendazole?

Parbendazole 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 Parbendazole?

CompoundList lists 6 suppliers of Parbendazole in China and United States. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

What is the price of Parbendazole?

Suppliers quote Parbendazole 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 Parbendazole

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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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