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258105

Sigma-Aldrich

Sulfuric acid

ACS reagent, 95.0-98.0%

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About This Item

Linear Formula:
H2SO4
CAS Number:
Molecular Weight:
98.08
Beilstein:
2037554
EC Number:
MDL number:
UNSPSC Code:
12352106
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent

Quality Level

Agency

suitable for EPA 1613
suitable for SM 4500 - NH3
suitable for SM 5210

vapor density

<0.3 (25 °C, vs air)

vapor pressure

1 mmHg ( 146 °C)

description

Free from suspended or insoluble matter
Nominally 95-98% H2SO4

Assay

95.0-98.0%

form

liquid

ign. residue

≤5 ppm

color

APHA: ≤10

pH

1.2 (5 g/L)

bp

~290 °C (lit.)

density

1.840 g/mL at 25 °C (lit.)

anion traces

MnO4- reducers: ≤2 ppm
chloride (Cl-): ≤0.2 ppm
nitrate (NO3-): ≤0.5 ppm

cation traces

As: ≤0.01 ppm
Fe: ≤0.2 ppm
Hg: ≤5 ppb
NH4+: ≤2 ppm
heavy metals (as Pb): ≤1 ppm

SMILES string

OS(O)(=O)=O

InChI

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

InChI key

QAOWNCQODCNURD-UHFFFAOYSA-N

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Application

Sulfuric acid can be used as a catalyst:
  • In the hydrolysis of primary or secondary nitroalkane salts to aldehydes or ketones.
  • In the selective hydrolysis of nitriles to amides.
  • To synthesize amides of t-alkylcarbinamines via Ritter reaction between nitriles and alkenes.
  • To prepare 3,4-dialkyl-2(5H)-furanones by carbonylation of α,β-unsaturated aldehydes.
  • In the nitration of aromatic carbocycles and heteroaromatic compounds.
  • In the Friedel–Craft ketone synthesis using anhydrides via α-amidoalkylation reaction.

H2SO4 can also be used in the following reactions:
  • Michael′s addition reactions
  • Electrophilic substitution reactions
  • Esterification of highly hindered aromatic acids
  • Aldol condensation reaction
  • Beckmann rearrangement
  • Hofmann–Loffler–Freytag reaction
  • Isomerization
  • Dehydrogenation
  • Sulfonation

Other Notes

ACS specifications same as product 320501
4L and 4X4L are packaged in poly bottles
SKU-Pack sizes with -PC are packaged in PVC coated glass bottles.

Pictograms

Corrosion

Signal Word

Danger

Hazard Statements

Hazard Classifications

Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1A

Storage Class Code

8B - Non-combustible corrosive hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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