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32318

Sigma-Aldrich

Sodium acetate trihydrate

puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99.5%

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Synonym(s):
Acetic acid sodium salt trihydrate
Linear Formula:
CH3COONa · 3H2O
CAS Number:
Molecular Weight:
136.08
Beilstein/REAXYS Number:
3732037
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent
puriss. p.a.

agency

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

assay

≥99.5%

form

crystalline

autoignition temp.

1112 °F

impurities

≤0.0005% heavy metals (as Pb)
≤0.005% KMnO4 red. matter (as HCOOH)
≤0.005% in water soluble matter

loss

39.0-40.5% loss on drying, 130 °C

pH

7.5-9.0 (20 °C, 5%)

anion traces

chloride (Cl-): ≤0.001%
phosphate (PO43-): ≤5 mg/kg
sulfate (SO42-): ≤20 mg/kg

cation traces

Al: ≤0.2 mg/kg
As: ≤2 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

suitability

in accordance 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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1 of 4

This Item
236500SX025571188
vibrant-m

32318

Sodium acetate trihydrate

Essential Grade
vibrant-m

236500

Sodium acetate trihydrate

-
vibrant-m

SX0255

Sodium acetate trihydrate

-
vibrant-m

71188

Sodium acetate trihydrate

Premium Grade
assay

≥99.5%

assay

≥99%

assay

99.0-101.0% (perchloric acid titration)

assay

≥99.5% (NT)

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

impurities

≤0.0005% heavy metals (as Pb), ≤0.005% in water soluble matter, ≤0.005% KMnO4 red. matter (as HCOOH)

impurities

MnO4- reducers, passes test, ≤0.005% insolubles

impurities

≤0.005% Insoluble matter

impurities

insoluble matter, passes filter test, ≤0.005% KMnO4-reducing matter (as HCOOH)

suitability

in accordance for appearance of solution

suitability

-

suitability

-

suitability

-

cation traces

Al: ≤0.2 mg/kg, Ca: ≤10 mg/kg, Cu: ≤5 mg/kg, K: ≤50 mg/kg, Pb: ≤5 mg/kg, As: ≤2 mg/kg, Fe: ≤5 mg/kg, Zn: ≤5 mg/kg, Cd: ≤5 mg/kg, Mg: ≤5 mg/kg

cation traces

Ca: ≤0.005%, Fe: ≤5 ppm, K: ≤0.005%, Mg: ≤0.002%, heavy metals (as Pb): ≤5 ppm

cation traces

Ca: ≤0.001%, Fe: ≤0.0005%, K: ≤0.005%, Mg: ≤0.0005%, heavy metals (as Pb): ≤0.0005%

cation traces

Al: ≤5 mg/kg, As: ≤0.1 mg/kg, Bi: ≤5 mg/kg, Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤50 mg/kg, Li: ≤5 mg/kg, Mg: ≤5 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

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 its crystal 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


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Water-responsive shape memory hybrid: Design concept and demonstration.
Fan K, et al.
Express Polymer Letters, 5(5), 409-416 (2011)
Methyl radical in irradiated single crystals of sodium acetate trihydrate.
Rogers MT and Kispert LD.
J. Chem. Phys. , 46(1), 221-223 (1967)
The crystal structure of sodium acetate trihydrate.
Cameron TS, et al.
Acta Crystallographica Section B, Structural Science, 32(1), 87-90 (1976)
Kyle Lakatos et al.
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