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Key Documents

Safety Information

30736

Sigma-Aldrich

Sulfuric acid, fuming

puriss. p.a., 20% SO3

Synonym(s):

Oleum

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About This Item

Linear Formula:
H2SO4 · (SO3)x
CAS Number:
Molecular Weight:
98.08
Beilstein:
2037554
MDL number:
UNSPSC Code:
12352106
PubChem Substance ID:

vapor density

3 (vs air)

vapor pressure

2 mmHg ( 25 °C)

grade

puriss. p.a.

Assay

≤87% total SO3 basis

concentration

20-30% (free SO3)

impurities

≤0.0002% ammonium (NH4)
≤0.0005% heavy metals (as Pb)

ign. residue

≤0.01%

density

1.90 g/mL at 20 °C
1.925 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤5 mg/kg

cation traces

As: ≤0.03 mg/kg
Fe: ≤50 mg/kg

SMILES string

O=S(=O)=O.OS(O)(=O)=O

InChI

1S/H2O4S.O3S/c1-5(2,3)4;1-4(2)3/h(H2,1,2,3,4);

InChI key

HIFJUMGIHIZEPX-UHFFFAOYSA-N

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Pictograms

Skull and crossbonesCorrosion

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 2 Inhalation - Skin Corr. 1A - STOT SE 3

Target Organs

Respiratory system

Supplementary Hazards

Storage Class Code

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Information

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