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Merck
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Key Documents

1.00720

Supelco

Sulfuric acid fuming 65% SO3

Synonym(s):

Sulfuric acid fuming 65% SO3, Oleum

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About This Item

Empirical Formula (Hill Notation):
H2O4S · SO3 (1:2)
CAS Number:
MDL number:
UNSPSC Code:
12352301
NACRES:
NA.21

vapor pressure

105 hPa ( 20 °C)

Quality Level

form

viscous liquid

concentration

64-66% (acidimetric, free SO3)

ign. residue

≤0.02%

color

clear to turbid colorless to brownish

pH

<1 (20 °C, 100 g/L in H2O)

bp

64 °C/1013 hPa

mp

1 °C

density

1.99 g/cm3 at 20 °C

storage temp.

2-30°C

InChI

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

InChI key

HIFJUMGIHIZEPX-UHFFFAOYSA-N

Analysis Note

Color (visual): colourless to brownish
Appearance of substance (visual): clear to turbid
Content of free SO₃ (acidimetric): 64 - 66 %
Residue on ignition: ≤ 0.02 %
The product may be present as a cloudy viscous liquid and form fine suspended particles

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Statements

Hazard Classifications

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

Target Organs

Respiratory system

Supplementary Hazards

Storage Class Code

6.1B - Non-combustible, acute toxic Cat. 1 and 2 / very toxic hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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