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Merck
CN

31481

Sodium sulfate

puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., anhydrous, ≥99.0%

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About This Item

Linear Formula:
Na2SO4
CAS Number:
7757-82-6
Molecular Weight:
142.04
NACRES:
NA.22
PubChem Substance ID:
329753782
UNSPSC Code:
12352302
EC Number:
231-820-9
MDL number:
MFCD00003504
Assay:
≥99.0%
Form:
crystalline

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InChI key

PMZURENOXWZQFD-UHFFFAOYSA-L

InChI

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

SMILES string

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

grade

ACS reagent, puriss. p.a.

agency

USP/NF, reag. ISO, reag. Ph. Eur.

assay

≥99.0%

form

crystalline

impurities

≤0.0005% heavy metals (by ICP-OES), ≤0.0005% total nitrogen (N), ≤0.01% in water insoluble matters, ≤0.03% free alkali (as NaOH), ≤0.05% free acid (as H2SO4)

loss

≤0.5% loss on ignition, 800 °C

pH

5.2-8.0 (20 °C, 5%)

density

2.68 g/mL at 25 °C (lit.)

anion traces

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

cation traces

As: ≤1 mg/kg, Ca: ≤20 mg/kg, Fe: ≤5 mg/kg, K: ≤100 mg/kg, Mg: ≤25 mg/kg

suitability

complies for appearance of solution

storage temp.

2-8°C

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Storage Class

13 - Non Combustible Solids

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificates of Analysis (COA)

Lot/Batch Number
STBK9365
STBK8848
STBK6396
STBK5493
STBK2619

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In this work, we characterize physical hydrogels based on poly(vinyl alcohol), PVA, as intelligent biointerfaces for surface-mediated drug delivery. Specifically, we assemble microstructured (μS) surface adhered hydrogels via noncryogenic gelation of PVA, namely polymer coagulation using sodium sulfate (Na(2)SO(4)). We
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