Sodium metabisulfite CAS 7681-57-4

Sodium metabisulfite, SO2 58.5% min;disodiummetabisulfite;disodiumpyrosulphite;fertisilo;metabisulfitedesodium;Sodiummetabisufite;SodiumMetabisulphiteAcs;SodiumMetabisulphiteExtraPure

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Model:
7681-57-4
Brand:
bosschem
Code:
7681-57-4

Product Description

Sodium metabisulfite Basic information
Product Name:	Sodium metabisulfite
CAS:	7681-57-4
MF:	2Na.O5S2
MW:	190.11
EINECS:	231-673-0
Mol File:	7681-57-4.mol
Sodium metabisulfite Chemical Properties
Melting point	>300 °C (lit.)
density	1.48
storage temp.	Store at +5°C to +30°C.
solubility	540 g/L (20°C)
form	Powder/Solid
Specific Gravity	1.48
color	White to slightly yellow
PH	3.5-5 (50g/l, H2O, 20℃)
Odor	Sulphorous
PH Range	4.5 at 50 g/l at 20 °C
Water Solubility	540 g/L (20 ºC)
Sensitive	Air & Moisture Sensitive
Merck	148,638
Exposure limits	ACGIH: TWA 5 mg/m3
Exposure limits	NIOSH: TWA 5 mg/m3
Stability:	Stable. Incompatible with strong oxidizing agents, strong acids. Contact with strong acids releases a poisonous gas. May be moisture and air sensitive.
InChIKey	HRZFUMHJMZEROT-UHFFFAOYSA-L
CAS DataBase Reference	7681-57-4(CAS DataBase Reference)
EPA Substance Registry System	Sodium metabisulfite (7681-57-4)

ITEM	SPECIFICATION	TEST RESULT
PURITY(AS Na2S2O5 ):	97.0%MIN	97.26%
SULFUR DIOXIDE(SO2):	65.0%MIN	65.53%
HEAVY METALS(As Pb):	0.0005%MAX	0.00015%
WATER INSOLUBLE:	0.05%MAX	0.02%
IRON(Fe):	0.003%MAX	0.0013%
PH VALUE:	4.0-4.8	4.4

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Sodium metabisulfite CAS 7681-57-4 2Na.O5S2

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Chemical detection methods

Spectroscopic Analysis Methods

Ultraviolet-Vis Spectrophotometry (UV-Vis)
Infrared Spectroscopy (IR/FTIR)
Atomic Absorption Spectroscopy (AAS)
X-ray Fluorescence Spectroscopy (XRF)
Nuclear Magnetic Resonance Spectroscopy (NMR)

Chromatographic Analysis

Gas Chromatography (GC)
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Ion Chromatography (IC)
Thin Layer Chromatography (TLC)

Mass Spectrometry Analysis

GC-MS / LC-MS/MS: Qualitative and Quantitative Analysis
ICP-MS: Trace Metal Elements (ppb Level)
TOF-MS: Precise Molecular Weight Determination

Electrochemical analysis methods

Polypotentiometric methods
Conductivity methods
Polarographic methods / Voltammetric methods
Coulometric analysis

Thermal Analysis Methods

Thermogravimetric Analysis (TGA)
Differential Scanning Calorimetry (DSC)
Differential Thermal Analysis (DTA)

Classical wet chemical analysis

Titration analysis
Gravity analysis