Sodium metabisulfite

SIGALD/13459 - puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E223, dry, 97-100.5%

Synonym: Sodium disulfite; Sodium pyrosulfite

CAS Number: 7681-57-4
Empirical Formula (Hill Notation): Na₂O₅S₂
Molecular Weight: 190.11
EC Number: 231-673-0
MDL Number: MFCD00167602
Linear Formula: Na₂S₂O₅
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-13459-500G-R	500 g	$0.00 1/EA CALL FOR PRICE	Add To Favorites
45-13459-1KG-R	1 kg	$60.20 1/EA	Add To Favorites
45-13459-5KG-R	5 kg	$235.00 1/EA	Add To Favorites
45-13459-4X5KG-R	5 kg	$0.00 4/EA CALL FOR PRICE	Add To Favorites

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This image depicts SKU: 13459-500G-R

Properties
Descriptions
Safety Info.
Basic Data

anion traces	chloride (Cl^-): ≤100 mg/kg
assay	97-100.5%
cation traces	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
composition	SO₂, 65.0-67.4%
form	powder or crystals
grade	puriss.
impurities	residue of solvents, complies
	≤0.02% thiosulfate (S₂O₃)
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
mp	>300 °C (lit.)
pH	3.5-5.0 (20 °C, 5%)
quality	dry
	meets analytical specification of Ph. Eur., BP, NF, FCC, E223
Quality Level	200
SMILES string	[Na+].[Na+].[O-]S(=O)S([O-])(=O)=O
suitability	complies for appearance of solution

Application:	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.
General description:	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.

Symbol	GHS05,GHS07
Signal word	Danger
Hazard statements	H302 - H318
Precautionary statements	P264 - P270 - P280 - P301 + P312 - P305 + P351 + P338 - P501
Hazard Codes	Xn
Risk Statements	22-31-41-52
Safety Statements	26-39-46
RIDADR	NONH for all modes of transport
WGK Germany	WGK 1
Flash Point(F)	Not applicable
Flash Point(C)	Not applicable
Supplemental Hazard Statements	EUH031

Purity	97-100.5%
mp	>300 °C (lit.)
UNSPSC	12352302

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