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Selenious Acid Commercial Pure and USP Grade Supplier, Manufacturer's Representative

FInOrIC, etymologically derived from our business line of Fine Inorganic, Organic and Industrial Chemicals, offers chemicals for Oil & Gas Exploration, Hydraulic Fracturing, Production, Stimulation, Coiled Tubing, Food & Feed Ingredients, Mineral Fortifiers and Pharmaceutical Excipients, in 55 countries across 5 continents. Backed by company owned & operated full-fledged chemical manufacturing facilities in Pleasanton, Midland & Houston, Texas with associated manufacturing sites in India, UAE and China we are a truly multi-national chemical manufacturer and distributor.

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For MSDS Sheet Click MSDS SDS of Selenious Acid Suppliers

Selenious Acid
Commercial Pure and USP Grade Suppliers
Selenious Acid

Selenous acid (or selenious acid) is the chemical compound with the formula H2SeO3. Structurally, it is more accurately described by (HO)2SeO.
The major use is in changing the color of steel, especially the steel in guns & razor blades the so-called "bluing" process which uses selenous acid. Some older were also made of blued steel. It is also used in darkening of copper, brass and bronze, producing a rich dark brown color.

Specifications of Commercial Pure Selenious Acid
CAS Number: [7783-00-8]
Molecular formula: H2SeO3
Molecular weight: 128.97
Description: White to off-white hygroscopic crystalline mass.
Residue on ignition: Max. 0.1 %.
Assay: Between 93.0% and 101.0%.


Selenious Acid USP Grade
H2SeO3 -- 128.97
Selenium dioxide, monohydrated. --- [7783-00-8].
Selenious Acid contains not less than 93.0 percent and not more than 101.0 percent of H2SeO3.

Identification
A: Dissolve about 50 mg in 5 mL of water, add about 100 mg of sodium bicarbonate, and mix: gas bubbles develop.
B: Dissolve about 50 mg in 5 mL of 0.1 N hydrochloric acid, and add about 50 mg of stannous chloride: a curdy tan-orange precipitate is formed.

Tests
Residue on ignition: not more than 1.0 mg, from 10.0 g (0.01%).
Insoluble matter: Dissolve 1 g in 5 mL of water: it dissolves completely and the solution is clear.
Selenate and sulfate: Dissolve about 0.5 g in 10 mL of water, add 0.1 mL of hydrochloric acid and 1 mL of barium chloride, and mix: no turbidity or precipitate is formed in 10 minutes.
Assay: Transfer about 100 mg of Selenious Acid, accurately weighed, to a suitable glass-stoppered flask, and dissolve in 50 mL of water. Add 10 mL of potassium iodide solution (3 in 10) and 5 mL of hydrochloric acid, mix, insert the stopper in the flask, and allow to stand for 10 minutes. Add 50 mL of water and 3 mL of starch, and titrate with 0.1 N sodium thiosulfate until the solution is colorless, then titrate with 0.1 N iodine VS to a blue endpoint. Subtract the volume of 0.1 N iodine from the volume of 0.1 N sodium thiosulfate to obtain the volume of 0.1 N sodium thiosulfate equivalent to selenious acid. Each mL of 0.1 N sodium thiosulfate is equivalent to 3.225 mg of H2SeO3.

Suppliers, Manufacturer's Representative:

Finoric LLC
Beasley Houston, Midland & Pleasanton, Texas, USA.

Tel: 1-855-346-6742 (1-855-FINORIC)
Email:
info@finoric.com

Most products offered from our Houston & Midland Texas area warehouse

We are looking for Technical Sales Representatives in New York, Chicago and Los Angeles Area.

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Calcium Sulfate Chromic Chloride
Cupric or Copper Chloride Magnesium Butyrate
Magnesium Chloride Anhydrous Magnesium Chloride Hexahydrate
Magnesium Sulfate Manganese Chloride
Manganese Sulfate Potassium Chloride
Sodium Acetate Anhydrous Sodium Acetate Trihydrate
Sodium Butyrate Sodium Diacetate
Sodium Nitrate, Sodium Nitrite Sodium Thiosulfate Pentahydrate
Sodium Thiosulfate Anhydrous Zinc Ammonium Chloride
Zinc Chloride Zinc Sulfate
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Palletized and Shrink Wrapped 25kg 50kg 55 lbs Export Import Palletized and Shrink Wrapped Drum Packing Selenious Acid Suppliers

26 June, 2018