Boron oxide - ≥99.9% metals basis, used for Metallurgical analysis of silicates, including the determination of silica and alkali. Blowpipe analysis. A flux used to decompose silicates. various applications , CAS No.1303-86-2

CAS: 1303-86-2 Cat. No.: B118450 Formula: B2O3 Molecular Weight: 69.62 EC Number: 215-125-8
AVAILABLE TO ORDER
GRADE & PURITY ≥99.9% metals basis
Synonyms
Diboron trioxide | Boric anhydride, 99.98% trace metals basis | Boric anhydride; | Boric Anhydride (Boron Trioxide B2O3) granular | Boric anhydride, puriss. p.a., >=98% (T) | Titanium Nitride (TiN) Powder | Boric anhydride, Vetec(TM) reagent grade, 98% |
Storage
Room temperature,Argon charged,Desiccated
Shipped In
Normal
★
Size
Germany (EU)
USA*
Price
Qty
100g
B118450-100g
—
3 In stock

€33.76

€39.83
Save €6.07 (15.25%)
500g
B118450-500g
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3 In stock

€128.34

€150.03
Save €21.69 (14.46%)
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Why this grade

≥99.9% metals basis for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Room temperature,Argon charged,Desiccated Ships Normal Check lot-specific COA for exact specifications.

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Quality documents

SDS, COA, datasheet, and spec sheet available for download. Lot-specific COA accessible via lot number lookup.

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Literature proof

Cited in 236 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Overview

It is hard and brittle, slightly bitter, and hygroscopic. It is soluble in alcohol and glycerol, and slowly dissolves in 30 parts cold water or 5 parts boiling water. It is irritating. Used in metallurgy, in silicate analysis for the determination of silica and alkalis. Also used in blowpipe analysis. A flux for decomposing silicates.

Specifications

Synonyms
Diboron trioxide | Boric anhydride, 99.98% trace metals basis | Boric anhydride; | Boric Anhydride (Boron Trioxide B2O3) granular | Boric anhydride, puriss. p.a., >=98% (T) | Titanium Nitride (TiN) Powder | Boric anhydride, Vetec(TM) reagent grade, 98% |
Specifications & Purity
≥99.9% metals basis
Application
Metallurgical analysis of silicates, including the determination of silica and alkali. Blowpipe analysis. A flux used to decompose silicates.
Storage
Room temperature,Argon charged,Desiccated
Shipped In
Normal
Purity
≥99.9% metals basis
Names and Identifiers
Pubchem Sid
Pubchem Sid Url
https://pubchem.ncbi.nlm.nih.gov/substance/508814014
Canonical Smiles
B(=O)OB=O
IUPAC Name
oxo(oxoboranyloxy)borane
InChIKey
JKWMSGQKBLHBQQ-UHFFFAOYSA-N
INCHI
1S/B2O3/c3-1-5-2-4
Isomeric SMILES
B(=O)OB=O
WGK Germany
1
Molecular Weight
69.62
Reaxy-Rn
9549840
Reaxys-RN_link_address
https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=9549840&ln=

Documentation

📋 Safety Data Sheet (SDS)

Comprehensive hazard, handling, storage, and regulatory compliance document.

<<<<<<< HEAD Download SDS → ======= Download SDS → >>>>>>> release248-p3

✅ Certificate of Analysis (COA)

Lot-specific quality data. Enter your lot number to retrieve the exact COA.

Look up COA →

📊 Datasheet

Quick-reference summary of product specifications and applications.

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🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomInorganic compounds
SuperclassMixed metal/non-metal compounds
ClassMetalloid organides
SubclassMetalloid oxides
Intermediate Tree Nodes Not available
Direct ParentMetalloid oxides
Alternative Parents Metalloid salts  Inorganic salts  Inorganic oxides  
Molecular FrameworkNot available
Substituents Metalloid oxide - Inorganic oxide - Inorganic salt - Inorganic metalloid salt
DescriptionThis compound belongs to the class of inorganic compounds known as metalloid oxides. These are inorganic compounds containing an oxygen atom of an oxidation state of -2, in which the heaviest atom bonded to the oxygen is a metalloid.
External Descriptors boron oxide
3D Structure
Interactive Chemical Structure Model





Certificates (CoA,COO,BSE/TSE and Analysis Chart)
C of A & Other Certificates(BSE/TSE, COO):
Analytical Chart:

Find and download the COA for your product by matching the lot number on the packaging.

39 results found

Lot NumberCertificate TypeDateItem
I2620818I2620818Certificate of AnalysisSep 14, 2026 B118450
I2620817I2620817Certificate of AnalysisSep 14, 2026 B118450
I2620816I2620816Certificate of AnalysisSep 14, 2026 B118450
D2629068D2629068Certificate of AnalysisApr 17, 2026 B118450
D2629069D2629069Certificate of AnalysisApr 17, 2026 B118450
D2629070D2629070Certificate of AnalysisApr 17, 2026 B118450
L2509689L2509689Certificate of AnalysisDec 01, 2025 B118450
I2525237I2525237Certificate of AnalysisJul 17, 2025 B118450
I2525199I2525199Certificate of AnalysisJul 17, 2025 B118450
G2530296G2530296Certificate of AnalysisJul 17, 2025 B118450
G2530298G2530298Certificate of AnalysisJul 17, 2025 B118450
E2520205E2520205Certificate of AnalysisMay 08, 2025 B118450
E2520689E2520689Certificate of AnalysisMay 08, 2025 B118450
D2502166D2502166Certificate of AnalysisMar 17, 2025 B118450
D2502165D2502165Certificate of AnalysisMar 17, 2025 B118450
A2506072A2506072Certificate of AnalysisDec 23, 2024 B118450
G2509038G2509038Certificate of AnalysisDec 23, 2024 B118450
A2506071A2506071Certificate of AnalysisDec 23, 2024 B118450
L2402119L2402119Certificate of AnalysisNov 04, 2024 B118450
L2402118L2402118Certificate of AnalysisNov 04, 2024 B118450
I2425141I2425141Certificate of AnalysisJun 12, 2024 B118450
I2425140I2425140Certificate of AnalysisJun 12, 2024 B118450
G2402160G2402160Certificate of AnalysisJun 12, 2024 B118450
G2402178G2402178Certificate of AnalysisJun 12, 2024 B118450
C2406148C2406148Certificate of AnalysisFeb 26, 2024 B118450
C2406149C2406149Certificate of AnalysisFeb 26, 2024 B118450
C2406150C2406150Certificate of AnalysisFeb 26, 2024 B118450
L2305073L2305073Certificate of AnalysisNov 17, 2023 B118450
J2311238J2311238Certificate of AnalysisSep 18, 2023 B118450
D2319266D2319266Certificate of AnalysisFeb 28, 2023 B118450
D2319311D2319311Certificate of AnalysisFeb 28, 2023 B118450
I2202206I2202206Certificate of AnalysisJul 22, 2022 B118450
I2202204I2202204Certificate of AnalysisJul 22, 2022 B118450
F2223162F2223162Certificate of AnalysisMar 15, 2022 B118450
G2307563G2307563Certificate of AnalysisMar 15, 2022 B118450
F2223187F2223187Certificate of AnalysisMar 15, 2022 B118450
I2413075I2413075Certificate of AnalysisMar 15, 2022 B118450
I2412070I2412070Certificate of AnalysisMar 15, 2022 B118450
F2223188F2223188Certificate of AnalysisMar 15, 2022 B118450
Chemical and Physical Properties
Sensitivitymoisture sensitive
x_boil_point_char1860 °C
x_melt_point_char450°C
Molecular Weight69.630 g/mol
XLogP3
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count3
Rotatable Bond Count0
Exact Mass70.0034 Da
Monoisotopic Mass70.0034 Da
Topological Polar Surface Area43.400 Ų
Heavy Atom Count5
Formal Charge0
Complexity34.200
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
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