31448
Sodium metabisulfite
puriss. p.a., ACS reagent, reag. Ph. Eur., dry, 98-100.5%
Synonym(s):
Sodium disulfite, Sodium pyrosulfite
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About This Item
Linear Formula:
Na2S2O5
CAS Number:
Molecular Weight:
190.11
NACRES:
NB.24
PubChem Substance ID:
UNSPSC Code:
12352302
EC Number:
231-673-0
MDL number:
Assay:
98-100.5%
Form:
powder
Quality Segment
agency
reag. Ph. Eur.
grade
ACS reagent, puriss. p.a.
assay
98-100.5%
form
powder
quality
dry
impurities
≤0.01% thiosulfate (S2O3)
pH
3.5-5.0 (20 °C, 5%)
mp
>300 °C (lit.)
anion traces
chloride (Cl-): ≤50 mg/kg
cation traces
As: ≤0.5 mg/kg, Ca: ≤50 mg/kg, Cd: ≤50 mg/kg, Co: ≤50 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤100 mg/kg, Ni: ≤50 mg/kg, Pb: ≤5 mg/kg, Zn: ≤10 mg/kg
SMILES string
[Na+].[Na+].[O-]S(=O)S([O-])(=O)=O
InChI
1S/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
InChI key
HRZFUMHJMZEROT-UHFFFAOYSA-L
General description
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signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 4 Oral - Eye Dam. 1
supp_hazards
Storage Class
13 - Non Combustible Solids
wgk
WGK 1
flash_point_f
Not applicable
flash_point_c
Not applicable
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