Sharjah Chemicals is leading Supplier, Manufacture and Exporter of Selenous Acid in Sharjah UAE, Al Qusais, Deira, Saif Zone, Fujairah,Dubai, Abudhabi, Ajman, Diera, UAE Middle East, Al Quoz, Jebel Ali, Umm Al Quawain, Ras Al Khaimah, Masafi, Khor Fakkan, Al Hayl, Al Ain, Ras Al Khor Industrial Area, Al khubaisi,  Um Ramool Industrial Area, Al Qusais Industrial Area,  Jebel Ali.

Product Information:
Selenous Acid (or selenious acid) is the chemical compound with the formula H2SeO3. Structurally, it is more accurately described by (HO)2SeO. It is the principal oxoacid of selenium; the other being selenic acid.

Product Application:

  • The major use is in protecting and changing the color of steel, especially steel parts on firearms.
  • The so-called cold-bluing process uses selenous acid, copper(II) nitrate, and nitric acid to change the color of the steel from silver-grey to blue-grey or black. Alternative procedures use copper sulfate and phosphoric acid instead. This process deposits a coating of copper selenide and is fundamentally different from other bluing processes which generate black iron oxide. Some older razor blades were also made of blued steel.
  • Another use for selenious acid is the chemical darkening and patination of copper, brass and bronze, producing a rich dark brown color that can be further enhanced with mechanical abrasion.
  • It can be use used as an oxidizing agent e.g. in laboratory preparation of glyoxal (ethane-1,2-dione) from glycol.
  • Selenious acid is a key component of the Mecke reagent used for drug checking

Product Note:
Like many selenium compounds, selenous acid is highly toxic in excessive quantities, and ingestion of any significant quantity of selenous acid is usually fatal, however it is an approved dietary source in proper amounts. Symptoms of selenium poisoning can occur several hours after exposure, and may include stupor, nausea, severe hypotension and death

Product Technical Specification:

Appearance white hygroscopic crystals
Density 3.0 g/cm3
Melting point decomposes at 70°C
Solubility in water very soluble
Solubility soluble in ethanol
Acidity (pKa) 2.46, 7.3
Conjugate base Hydrogenselenite
Magnetic susceptibility (χ) −45.4·10−6 cm3/mo


Available Packing Size:….

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Free Delivery / Supply Locations :
Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Ras al Khaimah, Fujairah, Sharjah, Umm Al Quwain, Fujairah, Ruwais, Mina (Port) Zayed, Khalifa Port, Kizad, Port Rashid, Jebel Ali Port, DP WORLD, Jebel Ali Free Zone, Khor Fakkan Container Terminal, Port Rashid, Jebel Ali Port, Mina Kalid Port, Khor Fhakan Port ( Khawr Fakkan, Khawr al-Fakkan ), Sharjah Creek, Ajman, Port of Hamriyah, Mina Zayed Port, Mussafah port, Khalifa Port, Umm al-Nar Port, Um Al Quwain Port, Saqr Port, Port of Fujairah, Dibba Port, Jebel Dhanna, Mina Al Hamriya, Mina Rashid, All United Arab Emirates.