sodium sulphite anhydrous 95% extrapure

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Three black plastic bottles of nitric acid with white hazard labels are arranged in a row against a grey background.

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Two white plastic chemical containers with black lids, labeled "Chemnovato." The left contains Magnesium Sulphate, and the right contains Acetyl Salicylic Acid, both on a gray background.

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Two brown glass bottles labeled "Chloroform 99.8% for HPLC" with hazard symbols, placed side by side on a neutral gray background.

Three dark brown bottles with red caps and Chemnovatic labels contain hydrochloric acid, nitric acid, and sulfuric acid, arranged side by side on a gray background.

Specification

Description

CAS	7757-83-7
Molecular Formula	Na2SO3
Molecular Weight	126.04
Shelf Life	60 Months

Physical Properties
Physical State at 20 °C	Solid	Colour	White crystalline
Odour	Odorless	pH Value	9.0 – 10.5 at 126 g/l at 25 °C
Melting Point/ Freezing Point [°C]	500°C	Density [g/cm3]	2.63
Solubility in Water [% weight]	126 g/l at 20 °C – completely soluble

Specifications
Appearance	White crystalline powder	Assay (Iodometric)	95 – 100.5%
So2	Min 48%	Identity	Passes test
Appearance of Solution	Passes test	Thiosulphate (S2O3)	Max 0.04%
Arsenic (As)	Max 0.0002%	Heavy Metal (As Pb)	Max 0.001%
Iron (Fe)	Max 0.001%	Copper (Cu)	Max 0.0005%
Selenium (Se)	Max 0.001%	Zinc (Zn)	Max 0.0025%

Dangerous Goods Information
UN Number	–	DG Class	–

sodium sulphite anhydrous 95% extrapure

$20.80

Size

UOM

Clear

SKU C02515-00500-HS Category Chemicals