Selenium trioxide
Also known as Selenium oxide (SeO3), selenonylideneoxidane, selenic anhydride
Key facts
What buyers check first
- Physical form
- Powder
- Melting point
- 118 °C
- Density
- 3.6 g/cm³
- Solubility
- Solubility in water: very good
- HS code
- 284290
- Category
- Silicates, borates and other salts
- UN number
- UN 3283
What is Selenium trioxide?
Plain description, key identifiers and synonyms
Selenium trioxide is a white Solid. (USCG, 1999)
Selenium trioxide is a chemical compound used in the manufacture of solar-energy devices.
Identifiers
Registry numbers, names and line notations, tap to copy
- CAS number
- 13768-86-0 CAS number cross-checked
- EC number
- 237-385-1
- Molecular formula
- O3Se
- InChIKey
- VFLXBUJKRRJAKY-UHFFFAOYSA-N
- InChI
- InChI=1S/O3Se/c1-4(2)3
- SMILES (canonical and isomeric)
- O=[Se](=O)=O
Synonyms
- Selenium oxide (SeO3)
- selenonylideneoxidane
- selenic anhydride
- Trioxide, Selenium
- Trioxo-lambda~6~-selane
Physical and chemical properties
Measured values and descriptors computed from the structure
Physical and chemical properties
Measured values, check the supplier specification for your grade
| Physical form | Powderexp.Measured value |
|---|---|
| Melting point | 118 °Cexp.Measured value |
| Density | 3.6 g/cm³exp.Measured value |
| Solubility | Solubility in water: very goodexp.Measured value |
Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.
Computed descriptors
Calculated from the structure, useful for screening and formulation
| Molecular weight | 126.96 g/molcalc.Computed value |
|---|---|
| Exact mass | 127.9013 Dacalc.Computed value |
| LogP (octanol/water) | -0.74calc.Computed value |
| Topological polar surface area | 51.21 Ųcalc.Computed value |
| Hydrogen bond donors | 0calc.Computed value |
| Hydrogen bond acceptors | 3calc.Computed value |
| Rotatable bonds | 0calc.Computed value |
| Heavy atoms | 4calc.Computed value |
| Rings | 0calc.Computed value |
| Aromatic rings | 0calc.Computed value |
| Fraction sp3 carbons | 0calc.Computed value |
| Formal charge | 0calc.Computed value |
| Stereocentres | 0calc.Computed value |
Calculated for screening. Confirm critical figures with the supplier.
Safety and hazards
GHS classification summary, not a safety data sheet
- UN number
- UN 3283
- Transport hazard class
- 6.1
- Packing group
- II
GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.
Full safety data and first aidSelenium trioxide suppliers
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Selenium trioxide price
Indicative price range per kg from live supplier offers
Suppliers quote this chemical on request. Send one free request and compare quotes side by side.
Uses and applications
What the substance is used for, by industry and function
Applications are not documented for this substance yet. Suppliers often describe uses on their product pages, linked in the suppliers list above.
Regulatory status
Inventories, regulations and trade controls that list this substance
No regulatory list memberships are recorded for this substance yet. Always check the rules of the importing and exporting country before trade.
HS code and trade data
Customs classification and reported world trade statistics
Global trade
World import and export statistics for the HS code Selenium trioxide is traded under.
Salts of inorganic acids or peroxoacids, other than double or complex silicates, including aluminosilicates…
* Partner reported figures, a lower bound.
The HS code shown for Selenium trioxide is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.
Frequently asked questions
Quick answers about Selenium trioxide, based on the data on this page
What is Selenium trioxide?
What is the CAS number of Selenium trioxide?
What is the molecular formula and weight of Selenium trioxide?
Is Selenium trioxide hazardous?
What is the HS code of Selenium trioxide?
Where can I buy Selenium trioxide?
What is the price of Selenium trioxide?
Guides for buyers
Practical guides that help when you source, ship or handle Selenium trioxide
- Article, SourcingHow to write an RFQ that gets fast and accurate quotesWhat suppliers need to quote quickly and comparably: exact product identity, quantity and packing, delivery terms, documents, samples and payment, with a ready to use template.Read
- Guide, Trade and logisticsShipping dangerous goods: UN numbers, classes and packing groupsHow the UN dangerous goods system works for chemicals, from the nine classes and UN numbers to packing groups, UN packaging marks, labels, documents and segregation.Read
- Guide, Trade and logisticsHS codes for chemicals and why they matterHow the Harmonized System classifies chemicals, the chapters that matter, the rules for chemically defined compounds and mixtures, and practical steps to find the right code.Read
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