Short Description::
CAS NO: 7757-83-7, Na2SO3, Sodium Sulphite sulfite Anhydrous, Sodium Sulfite
Long Description::
Application::
In the photographic industry to protect developer solutions from oxidation and (as hypo clear solution) to wash fixer (sodium thiosulfate) from film and photo-paper emulsions.
Dose::
It is used in chemical manufacturing as a sulfonation and sulfomethylation agent.
Note::
The storekeepers ensure that the chemicals are stored in sealed packaging so that these remain free from contamination & moisture during the transit.
Technical Specifications::
|
ANALYTICAL PROPERTIES
|
PHOTO GRADE Sodium Sulphite
|
|
SODIUM SULPHITE WT%
|
98.5 MIN
|
|
SODIUM SULPHATE WT%
|
1.5 MAX
|
|
SODIUM CHLORIDE WT%
|
0.10 MAX
|
|
SODIUM CARBONATE WT%
|
0.1 MAX
|
|
MOISTURE %
|
0.05 MAX
|
|
INSOLUBLES %
|
0.1 MAX
|
|
IRON(Fe) PPM
|
5 MAX
|
|
HEAVY METALS(Pb) PPM
|
10 MAX
|
Product remark::
Sodium Metabisulfite also called Sodium disulfite, disodium pentaoxodisulfate, disodium pyrosulfite.
Sodium Metabisulphite C.A.S. number is 7681-57-4 and its Chemical formula. Na2S2O5 and molecular weight is 190.11
Industrial Usages::
HOW to TEST purity of Sodium Sulfite?
PURITY TESTS
Reagents: Hydrochloric acid, hydrazinium sulfate, standard selenium solution (100µg Se/ml)
Procedure
Weigh 2.0 ± 0.1 g of sample and transfer to a 50-ml beaker. Add 10 ml water, 5 ml hydrochloric acid and boil to remove SO2.
Into a second beaker, weigh 1.0 ± 0.1 g of sample, add 0.05 ml standard selenium solution and proceed as above.
To each beaker add 2 g hydrazinium sulfate and warm to dissolve. Let stand for 5 min. Dilute the contents of each beaker to 50 ml in a Nessler tube and compare the colour of the two solutions. The sample should be less pink than the sample with the added standard.
METHOD OF ASSAY
Weigh 0.2 g of the sample to the nearest mg, add to 50.0 ml of 0.1 N iodine in a glass-stoppered flask, and stopper the flask. Allow to stand for 5 min, add 1 ml of hydrochloric acid, and titrate the excess iodine with 0.1 N sodium thiosulfate, adding starch TS as the indicator. Each ml of 0.1 N iodine is equivalent to 4.753 mg of Na2S2O5.
Useful Area::
Our range includes Sodium Thiosulphate, Sodium Acetate, Sodium Metabisulphite, Sodium Bisulphite, Sodium Sulphite Anhydrous, Ammonium Sulphate, Ammonium Chloride, Magnesium Sulphate, Sodium Phosphate (Mono / Di / Tri) etc.
Related Information::
The storekeepers ensure that the chemicals are stored in sealed packaging so that these remain free from contamination & moisture during the transit.
Sodium Metabisulfite supplier and exporter. Sodium Metabisulphite also called sodium pyro sulphite. Food grade of Sodium sulphite is used as preservative agent, reducing agent, Antibrowning agent, antioxidant, flour treatment agent also as preservative in biscuit industries.
We are keeping ready stock of Sodium Metabisulfite in 25 Kg and 50 Kg pack. And we are one of popular sodium metabisulphite supplier in Mumbai, Kandla - Gandhidham, Chennai - Ennore, Visakhapatnam, Kolkata, Fujairah, Dubai, Sharjah, Abu Dhabi, Sodium Sulphite supplier in Barka Ruwi Muscat Oman
Sodium Metabisulfite is White crystals or crystalline powder having an odour of sulfur dioxide
RXMARINE CHEMICAL TAG::