Osmic acid, AR ≥99.9%

Name: Osmic acid, AR ≥99.9%
Brand: Vaqora Chemicals
SKU: VQ-045689

About Osmic acid, AR ≥99.9%

Vaqora Chemicals supplies Osmic acid (AR grade), a precious metal compound registered under CAS number 20816-12-0 with a typical assay of ≥99.9%. Formula O4Os, molecular weight 254.2 g/mol. Its systematic (IUPAC) name is tetraoxoosmium. Common synonyms include Osmium tetraoxide and Perosmic oxide.

Store sealed in a dry, well-ventilated location away from incompatible materials. Under GHS it is labelled “Danger”, so handle it with suitable PPE and consult the SDS.

It is commonly used for materials research and chemical synthesis. Buyers come mainly from academic and industrial research.

We offer Osmic acid in 1 g and 5 mL packs with a batch-specific COA, and ship to customers worldwide. A Safety Data Sheet (SDS) and technical specifications are available on request. Larger quantities and custom packaging are available. Request a quote for pricing and lead time.

Typical applications

Materials research
Chemical synthesis

Industries

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Osmic acid, AR ≥99.9%
Catalogue No.	VQ-045689
CAS Number	20816-12-0
IUPAC name	tetraoxoosmium
Molecular formula	O₄Os
Molecular weight	254.2 g/mol
Exact mass	255.9411
Grade	AR
Purity / assay	≥99.9%
HSN code	28439019
InChIKey	VUVGYHUDAICLFK-UHFFFAOYSA-N
SMILES	O=[Os](=O)(=O)=O
PubChem CID	30318

Physical properties
Physical form	Other
H-bond donors / acceptors	0 / 4
TPSA	68.3 Å²
Synonyms	Osmium tetraoxide, Perosmic oxide, Osmium(VIII) oxide, Osmic acid anhydride, Perosmic acid anhydride, Osmium oxide (OsO4), (T-4)-, Acid, Osmic, Tetroxide, Osmium, Osmium oxide, (T-4)-, Osmium(VIII)oxide, Osmiumtetroxide

Safety & hazard information (GHS)

Corrosive

Toxic

Signal word: Danger

Hazard statements

H300Fatal if swallowed
H310Fatal in contact with skin
H314Causes severe skin burns and eye damage
H330Fatal if inhaled

Precautionary statements: P260, P262, P264, P270, P271, P280, P284, P301 + P316, P301 + P330 + P331, P302 + P352, P302 + P361 + P354, P304 + P340, P305 + P354 + P338, P316, P320, P321, P330, P361 + P364, P363, 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 20816-12-0

Osmic acid, 99.9%

CAS: 20816-12-0
Formula: O₄Os
MW: 254.2 g/mol

VQ-015398

Osmic acid, solution, 2% w/v

CAS: 20816-12-0
Formula: O₄Os
MW: 254.2 g/mol

VQ-015399

Frequently asked questions

What is the CAS number of Osmic acid, AR ≥99.9%?

The CAS Registry Number of Osmic acid, AR ≥99.9% is 20816-12-0. It is also known as Osmium tetraoxide, Perosmic oxide, Osmium(VIII) oxide.

What is the molecular formula and molecular weight of Osmic acid, AR ≥99.9%?

Osmic acid, AR ≥99.9% has the molecular formula O4Os and a molecular weight of 254.2 g/mol. Its IUPAC name is tetraoxoosmium.

Which grade and pack sizes of Osmic acid, AR ≥99.9% can I order?

We supply Osmic acid, AR ≥99.9% in AR (≥99.9%) grade, in 1 g, 5 mL packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Osmic acid, AR ≥99.9%?

Yes. Every lot of Osmic acid, AR ≥99.9% 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 Osmic acid, AR ≥99.9% be shipped internationally?

Yes. Osmic acid, AR ≥99.9% is classified as hazardous, 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.