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1.12080

Sulfuric acid

98%, for analysis EMSURE®

Synonym(e):

Schwefelsäure

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Lineare Formel:
H2SO4
CAS-Nummer:
Molekulargewicht:
98.08
UNSPSC Code:
12352301
EC Index Number:
231-639-5
NACRES:
NA.21
Beilstein/REAXYS Number:
2037554
MDL number:
Assay:
≥98% (alkalimetric)
Form:
liquid
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Produktname

Schwefelsäure 98 %, for analysis EMSURE®

vapor density

<0.3 (25 °C, vs air)

Quality Segment

vapor pressure

0.0001 hPa ( 20 °C), 1 mmHg ( 146 °C)

product line

EMSURE®

assay

≥98% (alkalimetric)

form

liquid

impurities

≤0.0002% Substances reducing potassium permanganate (as SO2)

ign. residue

≤0.0005%

color

APHA: ≤10

pH

0.3 (25 °C, 49 g/L in H2O)

bp

~290 °C (lit.)

mp

-20 °C

density

1.840 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.00001%, nitrate (NO3-): ≤0.00002%, phosphate (PO43-): ≤0.00005%

SMILES string

OS(O)(=O)=O

cation traces

Ag: ≤0.000002%, Al: ≤0.000005%, As: ≤0.000001%, Ba: ≤0.000005%, Be: ≤0.000001%, Bi: ≤0.00001%, Ca: ≤0.00002%, Cd: ≤0.000002%, Co: ≤0.000001%, Cr: ≤0.000005%, Cu: ≤0.000001%, Fe: ≤0.00001%, Ge: ≤0.000005%, K: ≤0.00001%, Li: ≤0.000001%, Mg: ≤0.000005%, Mn: ≤0.000001%, Mo: ≤0.000005%, NH4+: ≤0.0002%, Na: ≤0.00005%, Ni: ≤0.000002%, Pb: ≤0.000002%, Se: ≤0.0001%, Sr: ≤0.000002%, Ti: ≤0.00001%, Tl: ≤0.000005%, V: ≤0.000001%, Zn: ≤0.000005%, Zr: ≤0.00001%

storage temp.

no temp limit

InChI

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

InChI key

QAOWNCQODCNURD-UHFFFAOYSA-N

Application


  • Simultaneous determination of monochloropropanediol esters and glycidyl esters in vegetable oils by acidic transesterification-gas chromatography-mass spectrometry: In dieser Studie von Wang et al. wird eine Methode zum Nachweis schädlicher Verbindungen in Pflanzenölen vorgestellt, bei der Schwefelsäure für die Umesterung verwendet wird, gefolgt von einer GC-MS-Analyse (Wang et al., 2022).


  • Evaluation of an improved acid hydrolysis-HPLC assay for the acetyl content in chitin and chitosan: Ng et al. entwickelten eine verbesserte HPLC-Methode zur Messung des Acetylgehalts in Biopolymeren, bei der Schwefelsäure zur Hydrolyse verwendet wird, um eine genaue Quantifizierung zu gewährleisten (Ng et al., 2006).

Analysis Note

Gehalt (alkalimetrisch): ≥ 98,0 %
Farbe: ≤ 10 Hazen
Chlorid (Cl): ≤ 0,00001 %
Nitrat (NO₃): ≤ 0,00002 %
Phosphat (PO₄): ≤ 0,00005 %
Ag (Silber): ≤ 0,000002 %
Al (Aluminium): ≤ 0,000005 %
As (Arsen): ≤ 0,000001 %
Ba (Barium): ≤ 0,000005 %
Be (Beryllium): ≤ 0,000001 %
Bi (Bismut): ≤ 0,00001
Ca (Calcium): ≤ 0,00002 %
Cd (Cadmium): ≤ 0,000002 %
Co (Cobalt): ≤ 0,000001 %
Cr (Chrom): ≤ 0,000005 %
Cu (Kupfer): ≤ 0,000001 %
Fe (Eisen): ≤ 0,00001
Ge (Germanium): ≤ 0,000005 %
K (Kalium): ≤ 0,00001 %
Li (Lithium): ≤ 0,000001 %
Mg (Magnesium): ≤ 0,000005 %
Mn (Mangan): ≤ 0,000001 %
Mo (Molybdän): ≤ 0,000005 %
NH₄ (Ammonium): ≤ 0,0002 %
Na (Natrium): ≤ 0,00005 %
Ni (Nickel): ≤ 0,000002 %
Pb (Blei): ≤ 0,000002 %
Se (Selen): ≤ 0,0001 %
Sr (Strontium): ≤ 0,000002 %
Ti (Titan): ≤ 0,00001
Tl (Thallium): ≤ 0,000005 %
V (Vanadium)*: ≤ 0,000001 %
Zn (Zink): ≤ 0,000005 %
Zr (Zirkonium): ≤ 0,00001
Kaliumpermanganat reduzierende Substanzen (als SO₂): ≤ 0,0002 %
Glührückstand: ≤ 0,0005 %
Verfallsdatum: siehe Produktetikett

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

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Dieser Artikel
1.007161.018331.00748
assay

≥98% (alkalimetric)

assay

-

assay

95-97% (alkalimetric)

assay

≥97.5% (alkalimetric)

Quality Level

300

Quality Level

300

Quality Level

200

Quality Level

300

form

liquid

form

liquid

form

liquid

form

liquid

storage temp.

no temp limit

storage temp.

no temp limit

storage temp.

no temp limit

storage temp.

no temp limit

pH

0.3 (25 °C, 49 g/L in H2O)

pH

-

pH

0.3 (25 °C, 49 g/L in H2O)

pH

0.3 (25 °C, 49 g/L in H2O)

bp

~290 °C (lit.)

bp

103 °C/1013 hPa

bp

~290 °C (lit.)

bp

~290 °C (lit.)


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pictograms

Corrosion

signalword

Danger

Hazard Classifications

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

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

hcodes

Lagerklasse

8B - Non-combustible corrosive hazardous materials



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Questions

1–2 of 2 Questions  
  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf

      Helpful?

  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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