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Sigma-Aldrich

Sodium sulfate

BioUltra, anhydrous, ≥99.0% (T)

Synonym(s):

Disodium sulfate, Sodium sulphate, Sulfuric acid disodium salt

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About This Item

Linear Formula:
Na2SO4
CAS Number:
7757-82-6
Molecular Weight:
142.04
EC Number:
231-820-9
MDL number:
MFCD00003504
UNSPSC Code:
12352302
PubChem Substance ID:
57652381
NACRES:
NA.26

grade

anhydrous

product line

BioUltra

Assay

≥99.0% (T)

form

powder or crystals

impurities

insoluble matter, passes filter test
≤0.0005% total nitrogen (N)

loss

≤0.2% loss on ignition, 900 °C

pH

5.0-7.5 (25 °C, 1 M in H2O)

mp

884 °C (lit.)

solubility

H2O: 1 M at 20 °C, clear, colorless

density

2.68 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤10 mg/kg
phosphate (PO43-): ≤20 mg/kg

cation traces

Al: ≤5 mg/kg
As: ≤1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤20 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤100 mg/kg
Li: ≤5 mg/kg
Mg: ≤20 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

λ

1 M in H2O

UV absorption

λ: 260 nm Amax: 0.020
λ: 280 nm Amax: 0.018

SMILES string

[Na+].[Na+].[O-]S([O-])(=O)=O

InChI

1S/2Na.H2O4S/c;;1-5(2,3)4/h;;(H2,1,2,3,4)/q2*+1;/p-2

InChI key

PMZURENOXWZQFD-UHFFFAOYSA-L

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Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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