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227692

Sigma-Aldrich

Sulfur trioxide

contains stabilizer, ≥99%

Sinônimo(s):

Sulfuric anhydride

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About This Item

Fórmula linear:
SO3
Número CAS:
Peso molecular:
80.06
Número CE:
Número MDL:
Código UNSPSC:
12352300
ID de substância PubChem:

densidade de vapor

2.8 (vs air)

pressão de vapor

280 mmHg ( 25 °C)

Ensaio

≥99%

forma

liquid

contém

stabilizer

adequação da reação

reagent type: oxidant

Impurezas

low-melting solid polymer (the formation of which is unavoidable)

pb

44.7 °C (lit.)

pf

16.8 °C (lit.)

densidade

1.97 g/mL at 25 °C (lit.)

cadeia de caracteres SMILES

O=S(=O)=O

InChI

1S/O3S/c1-4(2)3

chave InChI

AKEJUJNQAAGONA-UHFFFAOYSA-N

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Descrição geral

Sulfur trioxide is an oxide of sulfur that is released during the combustion of sulfur bearing fuels. It can be prepared by the oxidation of sulfur dioxide in the presence of vanadia catalyst.

Aplicação

Sulfur trioxide may be used in the synthesis of methane sulfonic acid (MSA) by sulfonating methane. it may also be used in the synthesis of fluorinated β-sultones by reacting with fluoroolefins.

Pictogramas

CorrosionExclamation mark

Palavra indicadora

Danger

Frases de perigo

Classificações de perigo

Eye Dam. 1 - Skin Corr. 1A - STOT SE 3

Órgãos-alvo

Respiratory system

Perigos de suplementos

Código de classe de armazenamento

8B - Non-combustible corrosive hazardous materials

Classe de risco de água (WGK)

WGK 1

Ponto de fulgor (°F)

Not applicable

Ponto de fulgor (°C)

Not applicable

Equipamento de proteção individual

Faceshields, Gloves, Goggles


Certificados de análise (COA)

Busque Certificados de análise (COA) digitando o Número do Lote do produto. Os números de lote e remessa podem ser encontrados no rótulo de um produto após a palavra “Lot” ou “Batch”.

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  1. Which document(s) contains shelf-life or expiration date information for a given product?

    If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.

  2. How do I get lot-specific information or a Certificate of Analysis?

    The lot specific COA document can be found by entering the lot number above under the "Documents" section.

  3. How do I find price and availability?

    There are several ways to find pricing and availability for our products. Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers.

  4. Is Product 227692, Sulfur trioxide, OK to use if it contains solids?

    This product may contain low-melting solid polymer, which is unavoidable. If the material is not completely liquid, place the bottle in a glass beaker or metal pail and warm under heat lamp or in an oven at 35°C. DO NOT OVERHEAT! This product boils at 44.7°C. Melting may take up to one week. When the material is liquid, it is ready for use.

  5. What is the stabilizer used in Product 227692, Sulfur trioxide?

    The manufacturer considers the identity of the stabilizer to be proprietary information.

  6. Why does Product 227692, Sulfur trioxide, contain a stabilizer?

    The stabilizer is present to facilitate melting, not to prevent polymerization.

  7. How is Product 227692, Sulfur trioxide, packaged?

    This product is packaged in a screw-capped glass bottle.

  8. What is the Department of Transportation shipping information for this product?

    Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product. 

  9. My question is not addressed here, how can I contact Technical Service for assistance?

    Ask a Scientist here.

Fluorinated ?-Sultones.
Knunyants IL & Sokolski GA
Angewandte Chemie (International Edition in English), 11(7), 583-595 null
Direct sulfonation of methane to methanesulfonic acid by sulfur trioxide catalyzed by cerium (IV) sulfate in the presence of molecular oxygen.
Mukhopadhyay S and Bell AT
Advanced Synthesis & Catalysis, 346(8), 913-916 (2004)
Emissions of sulfur trioxide from coal-fired power plants.
Srivastava RK, et al.
Journal of the Air & Waste Management Association (1995), 54(6), 750-762 (2004)
Wei Liu et al.
Journal of agricultural and food chemistry, 58(1), 172-179 (2009-12-17)
The sulfation of psyllium was carried out with sulfur trioxide-pyridine in dimethyl formamide. Three sulfated psyllium derivatives, named SP1, SP2, and SP3, were characterized by sulfur content determination, elemental analysis, FT-IR, and surface charge analysis. The sulfated derivatives were also
T Kapias et al.
Journal of hazardous materials, 67(1), 9-40 (1999-05-20)
A new model describing the dispersion behaviour and the processes that occur in a cloud generated from accidental spills of SO3 and oleum has been developed. Such a cloud may initially behave as a dense gas, with several chemical and

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