Sodium disulfite

Product Name

Sodium disulfite, (sodium metabisulfite) for analysis EMSURE^® ACS,Reag. Ph Eur

SMILES string

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

InChI

1S/2Na.H2O5S2/c;;1-6(2)5-7(3)4/h;;(H,1,2)(H,3,4)/q2*+1;/p-2

InChI key

LDTLADDKFLAYJA-UHFFFAOYSA-L

grade

ACS reagent

agency

reag. Ph. Eur.

product line

EMSURE^®

assay

98.0-100.5% (iodometric)

form

powder

potency

1540 mg/kg LD₅₀, oral (Rat)
>2000 mg/kg LD₅₀, skin (Rat)

impurities

≤0.005% Insoluble matter

pH

3.5-5 (20 °C, 50 g/L in H₂O)

mp

150 °C (decomposition)

solubility

650 g/L

density

2.36 g/cm³ at 20 °C

bulk density

1000‑1200 kg/m³

anion traces

chloride (Cl^-): ≤0.005%
thiosulfate (S₂O₃^2-): ≤0.05%passes test

cation traces

As: ≤0.0001%
Fe: ≤0.0005%
heavy metals (as Pb): ≤0.001%

storage temp.

2-30°C

Quality Level

300