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13459

Sigma-Aldrich

Sodium metabisulfite

puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5%

Sinônimo(s):

Sodium disulfite, Sodium pyrosulfite

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About This Item

Fórmula linear:
Na2S2O5
Número CAS:
7681-57-4
Peso molecular:
190.11
Número CE:
231-673-0
Número MDL:
MFCD00167602
Código UNSPSC:
12352302
ID de substância PubChem:
329750183
NACRES:
NA.21

grau

puriss.

Ensaio

97-100.5%

Formulário

powder or crystals

qualidade

dry
meets analytical specification of Ph. Eur., BP, NF, FCC, E223

composição

SO2, 65.0-67.4%

Impurezas

residue of solvents, complies
≤0.02% thiosulfate (S2O3)

pH

3.5-5.0 (20 °C, 5%)

pf

>300 °C (lit.)

traços de ânion

chloride (Cl-): ≤100 mg/kg

traços de cátion

As: ≤2 mg/kg
Cu: ≤10 mg/kg
Fe: ≤10 mg/kg
Hg: ≤1 mg/kg
Pb: ≤2 mg/kg
Se: ≤5 mg/kg
Zn: ≤10 mg/kg

adequação

complies for appearance of solution

cadeia de caracteres SMILES

[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

chave InChI

HRZFUMHJMZEROT-UHFFFAOYSA-L

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Descrição geral

Sodium metabisulfite (MBS, Sodium disulfite) is an inorganic salt. It is the sodium salt of disulphurous (pyrosulfurous) acid. It is widely used as reducing agent in textile and photography industry. It is commonly added to various foods and wines as preservative.

Aplicação

Sodium metabisulfite was used to initiate the cross-linking of polybutadiene in the cores of the vesicle membranes by free radical polymerization in solution. It has been used to prevent the oxidation (as antioxidant) during the preparation of stock solutions of 6-hydroxydopamine in various studies.

Pictogramas

CorrosionExclamation mark
GHS05,GHS07

Palavra indicadora

Danger

Frases de perigo

H302,H318

Classificações de perigo

Acute Tox. 4 Oral - Eye Dam. 1

Perigos de suplementos

EUH031

Código de classe de armazenamento

11 - Combustible Solids

Classe de risco de água (WGK)

WGK 1

Ponto de fulgor (°F)

Not applicable

Ponto de fulgor (°C)

Not applicable

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Certificados de análise (COA)

Lot/Batch Number
BCCG2164
BCCF3722
BCCD5350
BCCC2730
BCCB1608

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