Tetrahydrophthalic anhydride(THPA) - ≥99% , CAS No.85-43-8

CAS: 85-43-8 Cat. No.: T195333 Molecular Weight: 152.14 EC Number: 201-605-4
AVAILABLE TO ORDER
GRADE & PURITY ≥99%
Synonyms
CAS-85-43-8 | 1,2,3,6-Tetrahydrophthalic anhydride | THPA | Tetrahydroftalanhydrid | Rikacid TH | 3a,4,7,7a-Tetrahydro-2-benzofuran-1,3-dione | 3a,4,7,7a-Tetrahydroisobenzofuran-1,3-dione | Tetrahydrophthalic acid anhydride | Tetrahydrophthalic anhydride
Storage
Room temperature,Argon charged
Shipped In
Normal
 ·  off list, applied to all prices below.
Size
Status
Price
Qty
25g
T195333-25g
1
$9.90
100g
T195333-100g
4
$11.90
500g
T195333-500g
2
$37.90
Enter a quantity for the sizes you want to add.
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Why this grade

≥99% for sensitive chromatographic and analytical workflows requiring minimal baseline interference.

🌡

Storage & shipping

Room temperature,Argon charged 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 6 peer-reviewed publications across chromatography, organic synthesis, and cross-coupling reactions.

Specifications

Synonyms
CAS-85-43-8 | 1, 2, 3, 6-Tetrahydrophthalic anhydride | THPA | Tetrahydroftalanhydrid | Rikacid TH | 3a, 4, 7, 7a-Tetrahydro-2-benzofuran-1, 3-dione | 3a, 4, 7, 7a-Tetrahydroisobenzofuran-1, 3-dione | Tetrahydrophthalic acid anhydride | Tetrahydrophthalic anhydride
Specifications & Purity
≥99%
Storage
Room temperature, Argon charged
Shipped In
Normal
Purity
≥99%
Names and Identifiers
Pubchem Sid488180163
Pubchem Sid Urlhttps://pubchem.ncbi.nlm.nih.gov/substance/488180163
Canonical SmilesC1C=CCC2C1C(=O)OC2=O
IUPAC Name3a,4,7,7a-tetrahydro-2-benzofuran-1,3-dione
InChIKeyKMOUUZVZFBCRAM-UHFFFAOYSA-N
INCHI1S/C8H8O3/c9-7-5-3-1-2-4-6(5)8(10)11-7/h1-2,5-6H,3-4H2
Isomeric SMILES C1C=CCC2C1C(=O)OC2=O
Alternate CAS 935-79-5
UN Number 1760
Packing Group I
Molecular Weight 152.14
Reaxy-Rn 82340
Reaxys-RN_link_address https://www.reaxys.com/reaxys/secured/hopinto.do?context=S&query=IDE.XRN=82340&ln=

Documentation

📋 Safety Data Sheet (SDS)

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

Download SDS →

✅ 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.

View datasheet →

🔬 Specification Sheet

Full quality attributes and acceptance criteria for this grade.

View spec sheet →

Advanced Data

Taxonomic Classification

Taxonomy Tree

KingdomOrganic compounds
SuperclassOrganoheterocyclic compounds
ClassIsobenzofurans
SubclassNot available
Intermediate Tree Nodes Not available
Direct ParentIsobenzofurans
Alternative Parents Dicarboxylic acids and derivatives  Tetrahydrofurans  Carboxylic acid anhydrides  Lactones  Oxacyclic compounds  Organic oxides  Hydrocarbon derivatives  Carbonyl compounds  
Molecular FrameworkAliphatic heteropolycyclic compounds
Substituents Isobenzofuran - Dicarboxylic acid or derivatives - Tetrahydrofuran - Carboxylic acid anhydride - Lactone - Oxacycle - Carboxylic acid derivative - Organic oxygen compound - Organic oxide - Hydrocarbon derivative - Organooxygen compound - Carbonyl group - Aliphatic heteropolycyclic compound
DescriptionThis compound belongs to the class of organic compounds known as isobenzofurans. These are organic aromatic compounds containing an isobenzofuran moiety.
External Descriptors Not available
3D Structure
Interactive Chemical Structure Model





Mechanisms of Action
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.

14 results found

Lot NumberCertificate TypeDateItem
K2130626Certificate of AnalysisJun 10, 2025 T195333
K2130628Certificate of AnalysisJun 10, 2025 T195333
F2605147Certificate of AnalysisApr 12, 2025 T195333
F2615060Certificate of AnalysisApr 12, 2025 T195333
H2501491Certificate of AnalysisApr 12, 2025 T195333
H2501610Certificate of AnalysisApr 12, 2025 T195333
H2501611Certificate of AnalysisApr 12, 2025 T195333
H2501612Certificate of AnalysisApr 12, 2025 T195333
B2311412Certificate of AnalysisNov 08, 2024 T195333
B2311413Certificate of AnalysisNov 04, 2024 T195333
K2412633Certificate of AnalysisJul 05, 2024 T195333
H2121381Certificate of AnalysisJun 07, 2023 T195333
H2121379Certificate of AnalysisJun 07, 2023 T195333
H2121380Certificate of AnalysisJun 07, 2023 T195333

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Chemical and Physical Properties
SolubilitySoluble in benzene and toluene; Slightly soluble in ether
SensitivityMoisture sensitive
Boil Point(°C)195℃
Melt Point(°C)101.4 °C
Molecular Weight152.150 g/mol
XLogP30.800
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count3
Rotatable Bond Count0
Exact Mass152.047 Da
Monoisotopic Mass152.047 Da
Topological Polar Surface Area43.400 Ų
Heavy Atom Count11
Formal Charge0
Complexity218.000
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count2
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
The total count of all stereochemical bonds0
Covalently-Bonded Unit Count1
Citations of This Product
References
1. Gu Guo, Yuanlong Guo, Hailiang Sheng, Pengcheng Liu, Lei Dai, Michael North, Lei Deng, Xiaofeng Luo, Haibo Xie.  (2023)  Synthesis of cellulose graft cyclic anhydride and epoxide alternating copolyesters in a DBU/ DMSO/CO2 solvent system.  INDUSTRIAL CROPS AND PRODUCTS,      [PMID:] [10.1016/j.indcrop.2023.117413]
2. Jinyun Xu, Hongjie Wang, He Wang, Yamin Liu, Wenyu Wang, Xin Jin, Changfa Xiao.  (2022)  Hydrogen bond strategy designed textile composite electrodes for supercapacitor with highly efficient utilization of polypyrrole.  Surfaces and Interfaces,      [PMID:] [10.1016/j.surfin.2022.101957]
3. Xu Renxin, Cheng Shixin, Zhou Jing, Shen Jie, Li Zheng, Tan Xing.  (2018)  Thermal and Mechanical Properties of Epoxy Resin Modified with N-(4-hydroxyphenyl)terahydrophthalic Anhydrideimide.  JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION,  33  (3): (744-748).  [PMID:] [10.1007/s11595-018-1887-8]
4. Renxin Xu, Detian Meng, Huajun Sun, Jing Zhou, Shixin Cheng, Zheng Li.  (2018)  Synthesis and properties of cycloaliphatic epoxy resins containing imide and diphenyl sulfone.  HIGH PERFORMANCE POLYMERS,      [PMID:] [10.1177/0954008318774822]
5. Dian Li, Luyan Sun, Yuting Zhang, Meng Yu, Jia Guo, Changchun Wang.  (2016)  Flexible assembly of targeting agents on porous magnetic nano-cargos by inclusion complexation for accurate drug delivery.  Materials Chemistry Frontiers,  (3): (521-529).  [PMID:] [10.1039/C6QM00049E]
6. Yongjian Wang, Huizhen Wang, Xueming Lv, Congcong Liu, Linshuang Qi, Xindi Song, Ao Yu.  (2013)  Enhancement of All-Trans Retinoic Acid-Induced Differentiation by pH-Sensitive Nanoparticles for Solid Tumor Cells.  MACROMOLECULAR BIOSCIENCE,  14  (3): (369-379).  [PMID:24115498] [10.1002/mabi.201300295]
Solution Calculators
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