Product

Pyridine sulfur trioxide

CAS No.：26412-87-3

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Pyridine sulfur trioxide Basic information

Product Name:	Pyridine sulfur trioxide
Synonyms:	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
CAS:	26412-87-3
MF:	C5H5NO3S
MW:	159.16
EINECS:	247-683-3
Product Categories:	Heterocycle-Pyridine series;Pyridines;Oxidation;Sulfur Compounds (for Synthesis);Synthetic Organic Chemistry
Mol File:	26412-87-3.mol

Pyridine sulfur trioxide Chemical Properties

Melting point	~160 °C
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
CAS DataBase Reference	26412-87-3(CAS DataBase Reference)
EPA Substance Registry System	Pyridine sulfur trioxide (26412-87-3)

Safety Information

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

MSDS Information

Provider	Language
Pyridine sulfur trioxide	English
ACROS	English
SigmaAldrich	English
ALFA	English

Pyridine sulfur trioxide Usage And Synthesis

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.
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	Ethyl acetate-->Sulfuric acid-->Pyridine-->Chlorosulfonic acid-->Chlorotrimethylsilane
Preparation Products	3-(pyridin-3-yl)propanal-->3-(3-CHLORO-PHENYL)-PROPIONALDEHYDE-->3-(4-CHLORO-PHENYL)-PROPIONALDEHYDE-->3-O-TOLYL-PROPIONALDEHYDE-->3-(4-NITRO-PHENYL)-PROPIONALDEHYDE-->ALPHA-KETOBUTYRIC ACID SODIUM SALT-->4-METHYLUMBELLIFERYL SULFATE POTASSIUM SALT-->Dextran Sulfate Sodium Salt

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