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25022

Sigma-Aldrich

Sodium acetate trihydrate

puriss., meets analytical specification of Ph. Eur., BP, USP, FCC, E262, 99.0-101.0% (calc. to the dried substance), ≤0.00002% Al

Synonym(s):

Acetic acid sodium salt trihydrate

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About This Item

Linear Formula:
CH3COONa · 3H2O
CAS Number:
Molecular Weight:
136.08
Beilstein/REAXYS Number:
3732037
EC Number:
MDL number:
UNSPSC Code:
12352300
PubChem Substance ID:
NACRES:
NA.21

grade

puriss.

Quality Level

assay

99.0-101.0% (calc. to the dried substance)

form

powder or crystals

autoignition temp.

1112 °F

quality

meets analytical specification of Ph. Eur., BP, USP, FCC, E262

impurities

organic volatile impurities, complies (GC)
reducing matter, complies
residual solvents, in accordance
≤0.00002% Al
≤0.001% heavy metals (as Pb)
≤0.002% KMnO4 red. matter (as O)
≤0.1% KMnO4 red. matter (as HCOOH)

loss

39.0-40.5% loss on drying, 130 °C

pH

7.5-9.0 (20 °C, 5%)

anion traces

chloride (Cl-): ≤50 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Al: ≤0.2 mg/kg
As: ≤2 mg/kg
Ca: ≤20 mg/kg
Cu: ≤10 mg/kg
Fe: ≤10 mg/kg
Hg: ≤1 mg/kg
K: ≤200 mg/kg
Mg: ≤20 mg/kg
Pb: ≤2 mg/kg
Zn: ≤10 mg/kg

suitability

complies for appearance of solution

SMILES string

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

InChI

1S/C2H4O2.Na.3H2O/c1-2(3)4;;;;/h1H3,(H,3,4);;3*1H2/q;+1;;;/p-1

InChI key

AYRVGWHSXIMRAB-UHFFFAOYSA-M

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General description

Sodium acetate trihydrate can be obtained from the crystallization of sodium acetate in water. On heating at 75°C, it melts, while on heating above 120°C it loses water of crystallization and gets converted into anhydrous form. The hyperfine proton and 13C splittings have been evaluated by recording ESR spectra of its irradiated single crystals. ESR studies suggested the existence of trapped methyl radicals. Its crystals are monoclinic and their structure has been investigated by photographic methods. Unit cell parameters were evaluated.

Application

Sodium acetate trihydrate may be used in the fabrication of silicone/sodium acetate trihydrate hybrid, a water-responsive shape memory hybrid.

Other Notes

Enzyme substrate for acetate kinase (EC 2.7.2.1)

Storage Class

11 - Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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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Eagleson M.
Concise Encyclopedia Chemistry, 995-995 (1994)
The crystal structure of sodium acetate trihydrate.
Cameron TS, et al.
Acta Crystallographica Section B, Structural Science, 32(1), 87-90 (1976)
Methyl radical in irradiated single crystals of sodium acetate trihydrate.
Rogers MT and Kispert LD.
J. Chem. Phys. , 46(1), 221-223 (1967)
Water-responsive shape memory hybrid: Design concept and demonstration.
Fan K, et al.
Express Polymer Letters, 5(5), 409-416 (2011)
Kit Frederiksen et al.
European journal of pharmaceutics and biopharmaceutics : official journal of Arbeitsgemeinschaft fur Pharmazeutische Verfahrenstechnik e.V, 91, 9-15 (2015-01-18)
Polymeric film-forming systems (FFSs) are potential drug delivery systems for topical application to the skin. The FFSs form thin and transparent polymeric films in situ upon solvent evaporation. Their application convenience and cosmetic attributes, superior to conventional semi-solids, may offer

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