Selenous acid, 98%

Name: Selenous acid, 98%
Brand: Vaqora Chemicals
SKU: VQ-015327

About Selenous acid, 98%

Selenous acid (CAS 7783-00-8) is a main-group metal compound offered by Vaqora Chemicals (Synthesis grade) at a purity of 98%. With the molecular formula H2O3Se, it has a molar mass of 128.99 g/mol. Common synonyms include Selenious acid and Monohydrated selenium dioxide.

The material typically appears as white to almost white to off-white powder or crystals. Key physical data: a melting point of 70 °C and a density of 3.004 g/mL. Store in a tightly closed container in a cool, dry and well-ventilated place. The GHS classification uses the signal word “Danger”, so appropriate gloves, eye protection and ventilation are recommended.

Key uses span metallurgy and plating and materials research. Buyers come mainly from academic and industrial research.

Available in 25 g, 100 g, 500 g and 5 kg packs, Selenous acid is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Metallurgy & plating
Materials research

Industries

Specifications & identifiers

Chemical identifiers
Product name	Selenous acid, 98%
Catalogue No.	VQ-015327
CAS Number	7783-00-8
IUPAC name	selenous acid
Molecular formula	H₂O₃Se
Molecular weight	128.99 g/mol
Exact mass	129.9169
Grade	Synthesis
Purity / assay	98%
HSN code	28111990
InChIKey	MCAHWIHFGHIESP-UHFFFAOYSA-N
SMILES	O[Se](=O)O
PubChem CID	1091

Physical properties
Physical form	Crystalline
Appearance	White to almost white to off-white powder or crystals
Melting point	70 °C
Density	3.004 g/mL
H-bond donors / acceptors	2 / 3
TPSA	57.5 Å²
UN number	UN 3283
Synonyms	Selenious acid, Monohydrated selenium dioxide, Selenium dioxide, monohydrated, selenige Saeure, dihydroxidooxidoselenium, Selenious acid (USP), Selenium (as selenious acid), (SeO(OH)2), [SeO(OH)2], Acid, Selenous, Acid, Selenious, Hydrogen Selenite

Safety & hazard information (GHS)

Toxic

Health hazard

Environmental hazard

Signal word: Danger

Hazard statements

H301+H331Toxic if swallowed or if inhaled
H301Toxic if swallowed
H331Toxic if inhaled
H373May causes damage to organs through prolonged or repeated exposure
H400Very toxic to aquatic life
H410Very toxic to aquatic life with long lasting effects

Precautionary statements: P260, P261, P264, P270, P271, P273, P301 + P316, P304 + P340, P316, P319, P321, P330, P391, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 7783-00-8

Synthesis

Selenous acid, 97%

CAS: 7783-00-8
Formula: H₂O₃Se
MW: 128.99 g/mol

VQ-015326

Frequently asked questions

What is the CAS number of Selenous acid, 98%?

The CAS Registry Number of Selenous acid, 98% is 7783-00-8. It is also known as Selenious acid, Monohydrated selenium dioxide, Selenium dioxide, monohydrated.

What is the molecular formula and molecular weight of Selenous acid, 98%?

Selenous acid, 98% has the molecular formula H2O3Se and a molecular weight of 128.99 g/mol. Its IUPAC name is selenous acid.

Which grade and pack sizes of Selenous acid, 98% can I order?

We supply Selenous acid, 98% in Synthesis (98%) grade, in 25 g, 100 g, 500 g, 5 kg, 4 x 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Selenous acid, 98%?

Yes. Every lot of Selenous acid, 98% is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Selenous acid, 98% be shipped internationally?

Yes. Selenous acid, 98% is classified as hazardous (UN 3283), so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.