Sodium thiosulfate pentahydrate

grade

ACS reagent

Quality Level

300

Agency

reag. ISO
reag. Ph. Eur.

product line

EMSURE^®

Assay

99.5-101.0% (iodometric)

form

solid

potency

>5000 mg/kg LD₅₀ oral (Rat)

impurities

≤0.005% Insoluble matter

pH

6.0-7.5 (20 °C 100 g/L in H₂O)

mp

48 °C

density

1.74 g/cm³ at 20 °C

bulk density

1000 kg/m³

anion traces

chloride (Cl^–): ≤0.008%
sulfate sulfite (as SO₄^2-): ≤0.1%
sulfide (S^2-): passes test

cation traces

Ca: ≤0.002%
Cu: ≤0.0005%
Fe: ≤0.0005%
K: ≤0.001%
Mg: ≤0.001%
N: ≤0.002%
Pb: ≤0.0005%
heavy metals (as Pb): ≤0.001%

storage temp.

2-30°C

InChI

1S/2Na.H2O3S2.5H2O/c;;1-5(2 3)4;;;;;/h;;(H2 1 2 3 4);5*1H2/q2*+1;;;;;;/p-2

InChI key

PODWXQQNRWNDGD-UHFFFAOYSA-L