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227692

Sigma-Aldrich

Sulfur trioxide

contains stabilizer, ≥99%

Sinónimos:

Sulfuric anhydride

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About This Item

Fórmula lineal:
SO3
Número de CAS:
7446-11-9
Peso molecular:
80.06
Número CE:
231-197-3
Número MDL:
MFCD00011452
Código UNSPSC:
12352300
ID de la sustancia en PubChem:
24853646

densidad de vapor

2.8 (vs air)

presión de vapor

280 mmHg ( 25 °C)

Ensayo

≥99%

Formulario

liquid

contiene

stabilizer

idoneidad de la reacción

reagent type: oxidant

impurezas

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

bp

44.7 °C (lit.)

mp

16.8 °C (lit.)

densidad

1.97 g/mL at 25 °C (lit.)

cadena SMILES

O=S(=O)=O

InChI

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

Clave InChI

AKEJUJNQAAGONA-UHFFFAOYSA-N

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Descripción general

Sulfur trioxide is an oxide of sulfur that is released during the combustion of sulfur bearing fuels.[1] It can be prepared by the oxidation of sulfur dioxide in the presence of vanadia catalyst.[2]

Aplicación

Sulfur trioxide may be used in the synthesis of methane sulfonic acid (MSA) by sulfonating methane.[3] it may also be used in the synthesis of fluorinated β-sultones by reacting with fluoroolefins.[4]

Pictogramas

CorrosionExclamation mark
GHS05,GHS07

Palabra de señalización

Danger

Frases de peligro

H314,H335

Clasificaciones de peligro

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

Órganos de actuación

Respiratory system

Riesgos supl.

EUH014

Código de clase de almacenamiento

8B - Non-combustible corrosive hazardous materials

Clase de riesgo para el agua (WGK)

WGK 1

Punto de inflamabilidad (°F)

Not applicable

Punto de inflamabilidad (°C)

Not applicable

Equipo de protección personal

Faceshields, Gloves, Goggles

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Certificados de análisis (COA)

Lot/Batch Number
SHBG3466V
SHBD6919V
SHBD3739V
40696JKV
SHBB4988V

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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)
Ri-sheng Yao et al.
Bioresource technology, 102(10), 6340-6343 (2011-03-12)
In this paper, a sulfur trioxide collaborative dilutes alkali method has been developed to pre-treat rice straw and it has been studied that the pre-treated rice straw structure affected the saccharification of the rice straw hydrolyzed by cellulose enzymatic hydrolysis.
Emilia Ivanova et al.
Journal of hazardous materials, 167(1-3), 306-312 (2009-02-10)
Various ion exchange forms of preliminary partly decationised zeolite (hydrogen forms) were obtained by indirect modification with metal salt solutions, as well as by direct treatment of natural clinoptilolite taken from Bulgarian deposits. Direct modification leads to a higher extent
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