Pyridine sulfur trioxide

Product Name: Pyridine sulfur trioxide
CAS No.: 26412-87-3
Chemical Name: Pyridine sulfur trioxide
Synonyms: SULFUR TRIOXIDE PYRIDINE COMPLEX;sulfur trioxide pyridine;PYRIDINE SULFUR TRIOXIDE COMPLEX;NSC 75831;PyridineSO3;fur trioxide;Pyridine suL;TAK438 Impurity 178;Sulfur trioxide pyri;sulfonylideneoxidane
CBNumber: CB9284694
Molecular Formula: C5H5NO3S
Formula Weight: 159.16
MOL File: 26412-87-3.mol

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Pyridine sulfur trioxide Property

Melting point:: ~160 °C
bulk density: 600kg/m3
storage temp.: Store below +30°C.
solubility: Soluble in polar organic solvents.
form: Powder
color: White to beige
Water Solubility: reacts
Sensitive: Moisture Sensitive
BRN: 3704116
InChI: InChI=1S/C5H5N.O3S/c1-2-4-6-5-3-1;1-4(2)3/h1-5H;
InChIKey: UDYFLDICVHJSOY-UHFFFAOYSA-N
SMILES: C1=CC=NC=C1.S(=O)(=O)=O
CAS DataBase Reference: 26412-87-3(CAS DataBase Reference)
EPA Substance Registry System: Pyridine sulfur trioxide (26412-87-3)

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Safety

Hazard Codes: C
Risk Statements: 22-34
Safety Statements: 26-36/37/39-45
RIDADR: UN 3261 8/PG 2
WGK Germany: 3
F: 3-10-21
Autoignition Temperature: >350 °C
TSCA: Yes
HazardClass: 8
PackingGroup: II
HS Code: 29420000
Toxicity: LD50 orally in Rabbit: 500 - 2000 mg/kg

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Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

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N-Bromosuccinimide Price

Sigma-Aldrich

Product number: 84737
Product name: Sulfur trioxide pyridine complex
Purity: technical, ≥45% SO
Packaging: 100g
Price: $94.4
Updated: 2025/07/31

Sigma-Aldrich

Product number: 8.18112
Product name: Sulfur trioxide pyridine complex
Purity: for synthesis
Packaging: 100g
Price: $79.9
Updated: 2025/07/31

Sigma-Aldrich

Product number: 84737
Product name: Sulfur trioxide pyridine complex
Purity: technical, ≥45% SO
Packaging: 10g
Price: $21.5
Updated: 2022/05/15

TCI Chemical

Product number: P0998
Product name: Pyridine - Sulfur Trioxide Complex
Purity: >95.0%(T)
Packaging: 25g
Price: $101
Updated: 2025/07/31

TCI Chemical

Product number: P0998
Product name: Pyridine - Sulfur Trioxide Complex
Purity: >95.0%(T)
Packaging: 100g
Price: $226
Updated: 2025/07/31

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Pyridine sulfur trioxide Chemical Properties,Usage,Production

Chemical Properties

white solid

Uses

Pyridine-Sulfur Trioxide Complex is used in the sulfation of squid ink polysaccharides (SIPs) as a potential candidate compound for the prevention of tumor metastasis. Pyridine-Sulfur Trioxide Complex is also used in the preparation and anticoagulation test of sulfated silk fibroin.

Uses

Usually used for sulfations of alcohols, sulfonations, deoxygenations and other reductions, oxidations with DMSO.

Uses

Sulfur trioxide-pyridine complex is used for sulfations of alcohols, sulfonations, deoxygenations and other reductions, oxidations with dimethyl sulfoxide. It is also used as a source of sulfur trioxide especially in the preparation of sulfate esters. Further, it is used as an activating electrophile in a Parikh-Doering oxidation. In addition to this, it is also used in the preparation and anticoagulation test of sulfated silk fibroin.

reaction suitability

reagent type: oxidant

Purification Methods

Wash the solid with a little CCl4, then H2O to remove traces of pyridine sulfate, and dry it over P2O5. [Baumgarten Chem Ber 59 1166 1926, Olah et al. Synthesis 59 1979, Beilstein 20/5 V 184].

Pyridine sulfur trioxide Preparation Products And Raw materials

Raw materials

Chlorotrimethylsilane Chlorosulfonic acid Ethyl acetate Pyridine Sulfuric acid

Preparation Products

4-METHYLUMBELLIFERYL SULFATE POTASSIUM SALT 3-O-TOLYL-PROPIONALDEHYDE 3-(3-CHLORO-PHENYL)-PROPIONALDEHYDE 3-(4-CHLORO-PHENYL)-PROPIONALDEHYDE ALPHA-KETOBUTYRIC ACID SODIUM SALT 3-(4-NITRO-PHENYL)-PROPIONALDEHYDE 3-(pyridin-3-yl)propanal Dextran Sulfate Sodium Salt

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Pyridine sulfur trioxide Suppliers

Americas 1 Belgium 4 Canada 2 China 417 Europe 2 France 2 Germany 10 India 28 Italy 2 Japan 8 South Korea 1 Spain 1 Switzerland 4 The Netherlands 1 United Kingdom 16 United States 48 Global 547

NANJING SHUNXIANG PHARMACEUTICAL TECHNOLOGY CO.,LTD.

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View Lastest Price from Pyridine sulfur trioxide manufacturers

Nanjing Shunxiang Pharmaceutical Technology Co.,Ltd.

Product: Pyridine sulfur trioxide 26412-87-3
Price: US $0.00/kg
Min. Order: 1kg
Purity: 98%
Supply Ability: 1
Release date: 2025-09-26

Hebei Chuanghai Biotechnology Co., Ltd

Product: Pyridine sulfur trioxide 26412-87-3
Price: US $10.00/KG
Min. Order: 1KG
Purity: 99%
Supply Ability: 10 mt
Release date: 2024-11-19

Hebei Junhua Import and Export Co., LTD

Product: Pyridine sulfur trioxide 26412-87-3
Price: US $0.00/kg
Min. Order: 1kg
Purity: 97%
Supply Ability: 1000
Release date: 2025-02-24

26412-87-3, Pyridine sulfur trioxideRelated Search:

Diantimony trioxide Sulfur trioxide Pyridine INTERMEDIATES N-(Trimethylsilyl)imidazole 2-Pyridinecarboxaldehyde Pyridine hydrochloride 1,2,4-Triazolo[4,3-a]pyridin-3(2H)-one Pyridinium tribromide Pyridine hydrobromide Pyridine-N-oxide Pyridine-4-boronic acid Sulfur 2,4-PENTANEDIONE, SILVER DERIVATIVE SALCOMINE COBALT(II) ACETYLACETONATE Cupric acetylacetonate N-BUTYLISOCYANIDE Sulfur Trioxide Pyridine Complex

Pyridine,compd.withsulfurtrioxide(1:1)

PYRIDINE SULFUR TRIOXIDE COMPLEX ( PSS )

Sulfur trioxide-pyridine complex, 98%, active SO3 ca 48-50% w/w

sulphur trioxide--pyridine (1:1)

Sulfur trioxide-pyridine complex, tech., 80%

Sulfurtrioxide-pyridinecomplex,98%

Sulfur trioxide pyridine complex, tech. (48.8-50.3% active SO3)

Pyridine, compd. with sulfur trioxide

sulfur trioride-pyridine

Pyridine, compound with sulfur trioxide (1:1)

Sulfur trioxide pyridine complex, (48.8 - 50.3% active sulfur trioxide), tech.

Sulfur trioxide·pyridine salt

Sulfur trioxide-pyridine complex, 98%, active SO3 ca 48-50%

sulfur trioxide pyridine

PyridineSO3

Sulfur trioxide pyridine complex ,98% [tech. (48.8-50.3% active SO3)]

Active Sulfure Trioxide

Sulfur trioxide pyri

SULFUR TRIOXIDE PYRIDINE COMPLEX FOR SYN

Sulfur trioxide pyridine coMplex, tech. (48.8-50.3% active SO3) 100GR

Pyridine Sulfure Trixoxide CoMplex

fur trioxide

Pyridine suL

Salfurtrioxidepyri-dinecomplex

Sulfurtrioxide,compd.withpyridine(1:1)

VINYLBENZYLDIMETHYLAMINE

N,N-DIMETHYLVINYLBENZYLAMINE

POLY(4-VINYLPYRIDINE) SULFUR TRIOXIDE COMPLEX

N-(4-VINYLBENZYL)-N,N-DIMETHYL AMINE

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PYRIDINE SULFUR TRIOXIDE COMPLEX

PYRIDINE SULFUR TRIOXIDE COMPLEX POLYMER BOUND

PYRIDINE-SULPHURTRIOXIDECOMPLEX

Sulfur trioxide pyridine coMplex, 98%, tech., active SO3 ca. 48 - 50%

Sulfur trioxide pyridine coMplex, tech., active SO3 ca. 48 - 50%

Sulfur trioxide pyridine coMplex 98%

Sulfur trioxide pyridine coMplex technical, >=45% SO3 basis

Pyridine sulphur trioxide

NSC 75831

Pyridine sulfur trioxde

Sulfur trioxide pyridine complex polymer-bound extent of labeling: >=2.0 mmol/g SO3 loading

(DIMETHYLAMINOMETHYL)STYRENE

Sulfur trioxide-pyridine complex, active SO3 48-50%, 98%

sulfonylideneoxidane

Sulfur trioxide pyridine complex≥ 98% (Assay)

Sulfur trioxide pyridine complex, 48.8 to 50.3% active SO

Sulfur trioxide-pyridine complex, Active SO

Pyridine-SulfurTrioxideComplex&gt

Sulfur trioxide pyridine complex, 98%, for synthesis, active SO3 ca. 48 - 50%

Pyridine sulfur trio

PyridinesulfChemicalbookurtrioxide

SUFUR TRIOXIDE PYRIDINE

Pyridine sulfure Trioxide

Thiopyridine trioxide

Sulfur trioxide-pyridine complex, 95%