Benzophenone-3,3′,4,4′-tetracarboxylic dianhydride(BTDA) - sublimed grade, ≥96%, low metal ion , CAS No.2421-28-5

CAS: 2421-28-5 Cat. No.: B121925 Molecular Weight: 322.23 Beilstein Registry Number: 761777 EC Number: 219-348-1
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GRADE & PURITY Sublimed grade ? Sublimed grade — purified by sublimation, giving very low non-volatile impurities. Use for electronics and applications needing high chemical purity. ≥96% low metal ion
Synonyms
BTDA | 2,2-Diphenyl-4-(dimethylamino)valeronitrile | 4,4'-Carbonyldiphthalic anhydride | benzophenone tetracarboxylic acid dianhydride | Benzophenone-3,3':4,4'-tetracarboxylic dianhydride | A817151 | CAS-2421-28-5 | 3,3',4,4'-Benzophenonetetracarboxylic a
Storage
Argon charged,Room temperature
Shipped In
Normal
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Size
Status
Price
Qty
5g
B121925-5g
2

$55.90

$77.90
Save $22.00 (28.24%)
25g
B121925-25g
1

$199.90

$269.90
Save $70.00 (25.94%)
100g
B121925-100g
2

$503.90

$863.90
Save $360.00 (41.67%)
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Why this grade

sublimed grade, ≥96%, low metal ion Sublimed grade for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

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Storage & shipping

Argon charged,Room temperature 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 42 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
BTDA | 2, 2-Diphenyl-4-(dimethylamino)valeronitrile | 4, 4'-Carbonyldiphthalic anhydride | benzophenone tetracarboxylic acid dianhydride | Benzophenone-3, 3':4, 4'-tetracarboxylic dianhydride | A817151 | CAS-2421-28-5 | 3, 3', 4, 4'-Benzophenonetetracarboxylic a
Specifications & Purity
sublimed grade, ≥96%, low metal ion
Storage
Argon charged, Room temperature
Shipped In
Normal
Grade
Sublimed grade
Purity
≥96%
Names and Identifiers
Canonical SmilesC1=CC2=C(C=C1C(=O)C3=CC4=C(C=C3)C(=O)OC4=O)C(=O)OC2=O
IUPAC Name5-(1,3-dioxo-2-benzofuran-5-carbonyl)-2-benzofuran-1,3-dione
InChIKeyVQVIHDPBMFABCQ-UHFFFAOYSA-N
INCHI1S/C17H6O7/c18-13(7-1-3-9-11(5-7)16(21)23-14(9)19)8-2-4-10-12(6-8)17(22)24-15(10)20/h1-6H
Isomeric SMILES C1=CC2=C(C=C1C(=O)C3=CC4=C(C=C3)C(=O)OC4=O)C(=O)OC2=O
WGK Germany 1
Molecular Weight 322.23
Beilstein 761777
Reaxy-Rn 761777
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=761777&ln=

Documentation

📋 Safety Data Sheet (SDS)

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

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✅ 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.

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Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassBenzenoids
ClassBenzene and substituted derivatives
SubclassBenzophenones
Intermediate Tree Nodes Not available
Direct ParentBenzophenones
Alternative Parents Tetracarboxylic acids and derivatives  Phthalic anhydrides  Isobenzofuranones  Aryl ketones  Carboxylic acid anhydrides  Oxacyclic compounds  Organic oxides  Hydrocarbon derivatives  
Molecular FrameworkAromatic heteropolycyclic compounds
Substituents Benzophenone - Tetracarboxylic acid or derivatives - Phthalic_anhydride - Phthalic anhydride - Benzofuranone - Isobenzofuranone - Isocoumaran - Aryl ketone - Carboxylic acid anhydride - Ketone - Carboxylic acid derivative - Oxacycle - Organoheterocyclic compound - Hydrocarbon derivative - Organic oxygen compound - Organooxygen compound - Organic oxide - Aromatic heteropolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as benzophenones. These are organic compounds containing a ketone attached to two phenyl groups.
External Descriptors Not available
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.

10 results found

Lot NumberCertificate TypeDateItem
L2106260Certificate of AnalysisSep 10, 2025 B121925
L2106305Certificate of AnalysisSep 10, 2025 B121925
L2106306Certificate of AnalysisSep 10, 2025 B121925
E1317001Certificate of AnalysisJan 06, 2025 B121925
C2406087Certificate of AnalysisMar 09, 2024 B121925
C2406088Certificate of AnalysisMar 09, 2024 B121925
C2406089Certificate of AnalysisMar 09, 2024 B121925
C2406090Certificate of AnalysisMar 09, 2024 B121925
C2406091Certificate of AnalysisMar 09, 2024 B121925
C2406092Certificate of AnalysisMar 09, 2024 B121925
Chemical and Physical Properties
SolubilityVery soluble in Dimethylformamide; Soluble in Tetrahydrofuran,Acetone
SensitivityMoisture sensitive
Flash Point(°F)615°F
Flash Point(°C)324°C
Boil Point(°C)320°C/5mm
Melt Point(°C)226°C
Molecular Weight322.220 g/mol
XLogP32.000
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count7
Rotatable Bond Count2
Exact Mass322.011 Da
Monoisotopic Mass322.011 Da
Topological Polar Surface Area104.000 Ų
Heavy Atom Count24
Formal Charge0
Complexity597.000
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
Documents & Articles
Citations of This Product
References
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