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13459

Sigma-Aldrich

Metabisolfito di sodio

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

Sinonimo/i:

Bisolfito di sodio, Pirosolfito di sodio

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About This Item

Formula condensata:
Na2S2O5
Numero CAS:
7681-57-4
Peso molecolare:
190.11
Numero CE:
231-673-0
Numero MDL:
MFCD00167602
Codice UNSPSC:
12352302
ID PubChem:
329750183
NACRES:
NA.21

Grado

puriss.

Saggio

97-100.5%

Forma fisica

powder or crystals

Qualità

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

Composizione

SO2, 65.0-67.4%

Impurezze

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

pH

3.5-5.0 (20 °C, 5%)

Punto di fusione

>300 °C (lit.)

Anioni in tracce

chloride (Cl-): ≤100 mg/kg

Cationi in tracce

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

Compatibilità

complies for appearance of solution

Stringa SMILE

[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
HRZFUMHJMZEROT-UHFFFAOYSA-L

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Categorie correlate

Descrizione generale

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.

Applicazioni

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.

Pittogrammi

CorrosionExclamation mark
GHS05,GHS07

Avvertenze

Danger

Indicazioni di pericolo

H302,H318

Classi di pericolo

Acute Tox. 4 Oral - Eye Dam. 1

Rischi supp

EUH031

Codice della classe di stoccaggio

13 - Non Combustible Solids

Classe di pericolosità dell'acqua (WGK)

WGK 1

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Certificati d'analisi (COA)

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