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Antibiotics and anti-infectives

Niridazole

Also known as Nitrothiazole, Ambilhar, Nitrothiamidazol

CAS 61-57-4Formula C6H6N4O3SMolar mass 214.21 g/molEC 200-512-6
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Niridazole chemical structure, C6H6N4O3S, CAS 61-57-4
2D chemical structure

Key facts

What buyers check first

All properties
Appearance
Yellow crystals from dimethylformamide/methanol
Melting point
260 to 262 °C
Solubility
Insoluble in most organic solvents, soluble in dimethylformamide
HS code
293410
Category
Antibiotics and anti-infectives
Illustrative photo, yellow pigment powder in a glass jar on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Niridazole?

Plain description, key identifiers and synonyms

Niridazole is a C-nitro compound and a member of 1,3-thiazoles.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
1-(5-nitro-1,3-thiazol-2-yl)imidazolidin-2-one
CAS number
61-57-4 CAS number cross-checked
EC number
200-512-6
Molecular formula
C6H6N4O3S
UNII
N116U8Y5QQ
InChIKey
RDXLYGJSWZYTFJ-UHFFFAOYSA-N
InChI
InChI=1S/C6H6N4O3S/c11-5-7-1-2-9(5)6-8-3-4(14-6)10(12)13/h3H,1-2H2,(H,7,11)
SMILES (canonical and isomeric)
C1CN(C(=O)N1)C2=NC=C(S2)[N+](=O)[O-]

Synonyms

  • Nitrothiazole
  • Ambilhar
  • Nitrothiamidazol
  • Niridazolum
  • Ciba 32644-Ba
  • Niridazol
  • 1-(5-nitro-1,3-thiazol-2-yl)imidazolidin-2-one
  • BA 32644
  • 1-(5-Nitro-2-thiazolyl)-2-imidazolidinone
  • CIBA 32644BA
  • niridazole-chlorethylcarboxamide
  • BA, CIBA 32.644
  • Nitrothiamidazole
  • Nitrothiazol
  • 2-Imidazolidinone, 1-(5-nitro-2-thiazolyl)-
  • Ciba 32644
  • Nitridazole
  • BA 32644 Ciba
  • NTOI
  • 1-(5-Nitro-2-thiazolyl)-2-imidazolinone
  • 1-(5-Nitro-2-thiazolyl)-2-oxotetrahydroimidazole
  • 1-(5-Nitro-2-thiazolyl)imidazolidin-2-one
  • 1-(5-Nitro-2-thiazolyl)-2-oxotetrahydroimidazol
  • 1-(5-Nitrothiazol-2-yl)imidazolidin-2-one
  • Niridazole (USAN/INN)
Show all 26 synonyms
  • 2-Imidazolidinone,1-(5-nitro-2-thiazolyl)-

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

Appearance
Yellow crystals from dimethylformamide/methanolexp.
Melting point
260 to 262 °Cexp.
Solubility
Insoluble in most organic solvents, soluble in dimethylformamideexp.

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
214.21 g/molcalc.
Exact mass
214.0161 Dacalc.
LogP (octanol/water)
0.58calc.
Topological polar surface area
88.37 Ųcalc.
Hydrogen bond donors
1calc.
Hydrogen bond acceptors
5calc.
Rotatable bonds
2calc.
Heavy atoms
14calc.
Rings
2calc.
Aromatic rings
1calc.
Fraction sp3 carbons
0.33calc.
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=C1NCCN1c1nccs1

O=C1NCCN1c1nccs1

2 rings, 11 atoms, the 1-(2-Thiazolyl)-2-imidazolidinone ring system.

22 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.

Niridazole suppliers

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Niridazole 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

Therapeutic category: Anthelmintic (Schistosoma).

Pharmacological actions

  • Amebicides
  • Schistosomicides

Roles

  • anthelminthic drug
  • antiinfective agent
  • antiparasitic agent
  • pharmaceutical

How it is made

Obtained by reaction of (2-amino-5-nitrothiazole) with 2- chloroethyl isocyanate followed by ring closure.

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 Niridazole is traded under.

HS 2934.10Indicative HS code

Compounds containing an unfused thiazole ring (whether or not hydrogenated) in the…

World exports in 2024
$3.88B
−16.1% vs 2023, imports $3.12B
2019 to 2024
Top exporters
  1. Switzerland * partner reported36.4%
  2. Ireland28.8%
  3. China10.0%
Top importers
  1. Canada33.4%
  2. United States14.4%
  3. Ireland13.1%

* Partner reported figures, a lower bound.

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

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

Frequently asked questions

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

What is Niridazole?

Niridazole is a C-nitro compound and a member of 1,3-thiazoles.

What is the CAS number of Niridazole?

The CAS registry number of Niridazole is 61-57-4.

What is the molecular formula and weight of Niridazole?

The molecular formula of Niridazole is C6H6N4O3S and its molar mass is 214.21 g/mol.

What is Niridazole used for?

Therapeutic category: Anthelmintic (Schistosoma).

Is Niridazole hazardous?

No GHS hazard classification for Niridazole 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 Niridazole?

Niridazole is usually classified under HS code 293410 (Compounds containing an unfused thiazole ring (whether or not hydrogenated) in the…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Niridazole?

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

What is the price of Niridazole?

Suppliers quote Niridazole 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 Niridazole

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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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