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258105

Sigma-Aldrich

Sulfuric acid

ACS reagent, 95.0-98.0%

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

grade

ACS reagent

Quality Level

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

Packaging

100, 4×100 mL in glass bottle
500 mL in PVC-coated bottle
500 mL in glass bottle
500 mL in poly bottle
6×500 mL in PVC-coated bottle
6×500 mL in glass bottle
6×500 mL in poly bottle
1 L in PVC-coated bottle
2 L in glass bottle
2.5 L in PVC-coated bottle
2.5 L in poly bottle
6×2.5 L in PVC-coated bottle
6×2.5 L in poly bottle
4 L in PVC-coated bottle

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

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

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