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Other active pharmaceutical ingredients

Sulfapyridine

Also known as Sulphapyridine, 2-Sulfapyridine, 2-Sulfanilamidopyridine

CAS 144-83-2Formula C11H11N3O2SMolar mass 249.30 g/molEC 205-642-7
GHS signal word: Danger. Pictograms: Acute toxicity (severe), Harmful or irritant, Serious health hazard, Hazardous to the environment 73 suppliers listed
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Sulfapyridine chemical structure, C11H11N3O2S, CAS 144-83-2
2D chemical structure

Key facts

What buyers check first

All properties
Physical form
Powder
Melting point
191.1 to 192.8
Solubility
Less than 1 mg/mL at 72 °F
HS code
293590
Category
Other active pharmaceutical ingredients
Illustrative photo, drums, an IBC tote and sacks in a chemical warehouse in a warehouse
Typical packagingIllustrative packaging image, not the actual product

What is Sulfapyridine?

Plain description, key identifiers and synonyms

Sulfapyridine is a sulfonamide consisting of pyridine with a 4-aminobenzenesulfonamido group at the 2-position. It has a role as an antiinfective agent, a xenobiotic, a dermatologic drug, an environmental contaminant and a drug allergen. It is a member of pyridines, a sulfonamide, a substituted aniline and a sulfonamide antibiotic. It is functionally related to a sulfanilamide.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
4-amino-N-pyridin-2-ylbenzenesulfonamide
CAS number
144-83-2 CAS number cross-checked
EC number
205-642-7
Molecular formula
C11H11N3O2S
UNII
Y5V2N1KE8U
MDL number
MFCD00038036
InChIKey
GECHUMIMRBOMGK-UHFFFAOYSA-N
InChI
InChI=1S/C11H11N3O2S/c12-9-4-6-10(7-5-9)17(15,16)14-11-3-1-2-8-13-11/h1-8H,12H2,(H,13,14)
SMILES (canonical and isomeric)
C1=CC=NC(=C1)NS(=O)(=O)C2=CC=C(C=C2)N

Synonyms

  • Sulphapyridine
  • 2-Sulfapyridine
  • 2-Sulfanilamidopyridine
  • Dagenan
  • Piridazol
  • Sulfidin
  • Sulfidine
  • Streptosilpyridine
  • Coccoclase
  • Plurazol
  • Pyriamid
  • Pyridazol
  • Eubasin
  • 2-Sulfanilylaminopyridine
  • Eubasinum
  • Relbapiridina
  • Septipulmon
  • Thioseptal
  • Adiplon
  • Haptocil
  • Trianon
  • Ronin
  • Sulfapiridina
  • Sulfapyridinum
  • N-2-Pyridylsulfanilamide
Show all 39 synonyms
  • 2-Sulfanilamidopyridin
  • Solfapiridina
  • 4-amino-N-pyridin-2-ylbenzenesulfonamide
  • Benzenesulfonamide, 4-amino-N-2-pyridinyl-
  • N(sup 1)-2-Pyridylsulfanilamide
  • 2-(p-Aminobenzenesulphonamido)pyridine
  • 2-Sulfanilyl aminopyridine
  • 4-amino-N-pyridin-2-yl-benzenesulfonamide
  • M&B 693
  • 4-(2-Pyridinylsulfonyl)aniline
  • M+B 693
  • 4-amino-N-(pyridin-2-yl)benzene-1-sulfonamide
  • 4-[(2-Pyridylamino)sulfonyl]aniline
  • Sulfanilamide, N1-2-pyridyl-

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
Powderexp.
Melting point
191.1 to 192.8exp.
Solubility
Less than 1 mg/mL at 72 °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
249.30 g/molcalc.
Exact mass
249.0572 Dacalc.
LogP (octanol/water)
1.46calc.
Topological polar surface area
85.08 Ųcalc.
Hydrogen bond donors
2calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
3calc.
Heavy atoms
17calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0calc.
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=S(=O)(Nc1ccccn1)c1ccccc1

O=S(=O)(Nc1ccccn1)c1ccccc1

2 rings, 16 atoms, the Benzenesulfonamide, n-2-pyridinyl- ring system.

545 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS07: Harmful or irritant
Harmful or irritant
GHS08: Serious health hazard
Serious health hazard
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H300Fatal if swallowed.
  • H317May cause an allergic skin reaction.
  • H360May damage fertility or the unborn child.
  • H361Suspected of damaging fertility or the unborn child.
  • H370Causes damage to organs.
  • H411Toxic to aquatic life with long lasting effects.
Precautionary statements (19)
  • P203Obtain, read and follow all safety instructions before use.
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P264Wash skin thoroughly after handling.
  • P270Do not eat, drink or smoke when using this product.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P302 + P352If on skin: Wash with plenty of water.
  • P308 + P316If exposed or concerned: Get emergency medical help immediately.
  • P318If exposed or concerned, get medical advice.
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P391Collect spillage.
  • 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

Sulfapyridine suppliers

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

All 73 suppliers
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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

73 suppliers in 18 countries

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Sulfapyridine 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-Infective Agents
  • Dermatologic Agents

Roles

  • aetiopathogenetic role
  • allergen
  • antibacterial agent
  • antiinfective agent
  • antimicrobial agent
  • dermatologic drug
  • drug allergen
  • environmental contaminant
  • pharmaceutical
  • xenobiotic

Pharmacology

Sulfapyridine is a short-acting sulfonamide antibiotic and by-product of the non-steroidal anti-inflammatory drug sulfasalazine. Its manufacture and use were discontinued in 1990.

Regulatory status

Inventories, regulations and trade controls that list this substance

United States

  • TSCA inventory (USA)
    Status: Active in US commerce

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Sulfapyridine 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 Sulfapyridine is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

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

What is Sulfapyridine?

Sulfapyridine is a sulfonamide consisting of pyridine with a 4-aminobenzenesulfonamido group at the 2-position. It has a role as an antiinfective agent, a xenobiotic, a dermatologic drug, an environmental contaminant and a drug allergen.

What is the CAS number of Sulfapyridine?

The CAS registry number of Sulfapyridine is 144-83-2.

What is the molecular formula and weight of Sulfapyridine?

The molecular formula of Sulfapyridine is C11H11N3O2S and its molar mass is 249.30 g/mol.

What is Sulfapyridine used for?

Use classes: Pharmaceuticals.

Is Sulfapyridine hazardous?

Sulfapyridine carries the GHS signal word "Danger". Main hazards: fatal if swallowed, may cause an allergic skin reaction, may damage fertility or the unborn child. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Sulfapyridine?

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

Where can I buy Sulfapyridine?

CompoundList lists 73 suppliers of Sulfapyridine in China, United States, United Kingdom, Hong Kong and 14 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Sulfapyridine in India?

4 suppliers in India list Sulfapyridine on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Sulfapyridine?

Suppliers quote Sulfapyridine 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 Sulfapyridine

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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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