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1-Cyclopentene-1,2-dicarboxylic anhydride

1-Cyclopentene-1,2-dicarboxylic anhydride Structure
1-Cyclopentene-1,2-dicarboxylic anhydride structure
CAS No.
3205-94-5
Chemical Name:
1-Cyclopentene-1,2-dicarboxylic anhydride
Synonyms
5,6-Dihydro-1H-cyclopenta[c]furan-1,3(4H)-dione;Cyclopentane-1,2-dicarboxylic anhydride;NSC 291644;1-Cyclopentene-1,2-dicarboxylic anhydride;5,6-dihydro-4H-cyclopenta[c]furan-1,3-dione;1H，3H，4H，5H，6H-Cyclopenta[c]furan-1,3-dione;Cyclopentene-1,2-dicarboxylic acid anhydride;1-Cyclopentene-1,2-dicarboxylic anhydride 96%;5,6-dihydro-4H-cyclopenta[c]furan-1,3-quinone;1H-Cyclopenta[c]furan-1,3(4H)-dione, 5,6-dihydro-
CBNumber:
CB2204873
Molecular Formula:
C7H6O3
Molecular Weight:
138.12
MDL Number:
MFCD00013330
MOL File:
3205-94-5.mol
MSDS File:
SDS
Last updated:2026-11-04 16:47:36
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1-Cyclopentene-1,2-dicarboxylic anhydride Properties

Melting point 42-45 °C (lit.)
Boiling point 133-135 °C/10 mmHg (lit.)
Density 1.2667 (rough estimate)
refractive index n20/D 1.4978(lit.)
Flash point >230 °F
storage temp. under inert gas (nitrogen or Argon) at 2-8°C
form solid
Appearance Colorless to off-white Solid-liquid mixture
BRN 123650
InChI 1S/C7H6O3/c8-6-4-2-1-3-5(4)7(9)10-6/h1-3H2
InChIKey GBBPFLCLIBNHQO-UHFFFAOYSA-N
SMILES O=C1OC(=O)C2=C1CCC2
Comptox DTXSID DTXSID60315061
UNSPSC Code 12162002
NACRES NA.23

SAFETY

Risk and Safety Statements

Symbol(GHS)  Exclamation Mark (GHS07)
GHS07
Signal word  Warning
Hazard statements  H315-H319-H335
Precautionary statements  P261-P305+P351+P338
target organs Respiratory system
PPE dust mask type N95 (US), Eyeshields, Gloves
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36
WGK Germany  3
F  21
Storage Class 11 - Combustible Solids
Hazard Classifications Eye Irrit. 2
Skin Irrit. 2
STOT SE 3

1-Cyclopentene-1,2-dicarboxylic anhydride price More Price(21)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
aablocks AA003E6J 5,6-Dihydro-1H-cyclopenta[c]furan-1,3(4H)-dione 95.00% 3205-94-5 50mg $139 2026-05-28 Buy
aablocks AA003E6J 5,6-Dihydro-1H-cyclopenta[c]furan-1,3(4H)-dione 95.00% 3205-94-5 100mg $188 2026-05-28 Buy
aablocks AA003E6J 5,6-Dihydro-1H-cyclopenta[c]furan-1,3(4H)-dione 98% 3205-94-5 250mg $248 2026-05-28 Buy
aablocks AA003E6J 5,6-Dihydro-1H-cyclopenta[c]furan-1,3(4H)-dione 95.00% 3205-94-5 500mg $372 2026-05-28 Buy
aablocks AA003E6J 5,6-Dihydro-1H-cyclopenta[c]furan-1,3(4H)-dione 95.00% 3205-94-5 1g $464 2026-05-28 Buy
Product number Packaging Price Buy
AA003E6J 50mg $139 Buy
AA003E6J 100mg $188 Buy
AA003E6J 250mg $248 Buy
AA003E6J 500mg $372 Buy
AA003E6J 1g $464 Buy

1-Cyclopentene-1,2-dicarboxylic anhydride Chemical Properties, Uses, Production

Uses

Valuable Diels-Alder dienophile, for example, in approach to the bicycloundecane system in taxanes.

Purification Methods

If IR has OH peaks, then some hydrolysis to the diacid (m 178o) must have occurred. In this case reflux it with an appropriate volume of Ac2O for 30minutes, evaporate the Ac2O and distil it in vacuo. The distillate solidifies and can be recrystallised from EtOAc/hexane (1:1). The diacid distils without decomposition due to formation of the anhydride. The dimethyl ester has m 120-125o/11mm. [Askain Chem Ber 98 2322 1965, Beilstein 17/11 V 125.]

1-Cyclopentene-1,2-dicarboxylic anhydride Preparation Products And Raw materials

Raw materials

Preparation Products

1-Cyclopentene-1,2-dicarboxylic anhydride Suppliers

Global Suppliers ( 48)
Supplier Tel Email Country ProdList Advantage
Zhejiang Tianmei Bioengineering Co., Ltd. 19967302939 3007630027@qq.com China 1532 58
Energy Chemical 400-0056266 sales8178@energy-chemical.com China 44567 61
Shanghai Hanhong Scientific Co.,Ltd. 021-54306202 13764082696 info@hanhongsci.com China 42917 64
Syntechem Co.,Ltd info@syntechem.com China 12973 57
Letopharm Limited +86-21-5821 5861 sales@letopharm.com China 70 55
ShangHai Caerulum Pharma Discovery Co., Ltd. 18149758185 18149758185 sales-cpd@caerulumpharma.com China 3493 58
Shanghai HuanChuan Industry Co.,Ltd. 021-61478794 sales@hcshhai.com China 9781 50
Cool Pharm, Ltd 021-60455363 18019463053 sales@coolpharm.com China 8455 58
Sigma-Aldrich 021-61415566 800-8193336 orderCN@merckgroup.com China 51389 80
Alfa Chemistry 1-516-6625404 support@alfa-chemistry.com United States 9170 60
Supplier Advantage
Zhejiang Tianmei Bioengineering Co., Ltd. 58
Energy Chemical 61
Shanghai Hanhong Scientific Co.,Ltd. 64
Syntechem Co.,Ltd 57
Letopharm Limited 55
ShangHai Caerulum Pharma Discovery Co., Ltd. 58
Shanghai HuanChuan Industry Co.,Ltd. 50
Cool Pharm, Ltd 58
Sigma-Aldrich 80
Alfa Chemistry 60

View Latest Price from 1-Cyclopentene-1,2-dicarboxylic anhydride manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE pictures 2026-06-30 1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE
3205-94-5
 1kg 98% 1000kg Shaanxi Dideu New Materials Co. Ltd
1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE pictures 2026-03-20 1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE
3205-94-5
 $10.00 1kg 99% 100 mt Hebei Chuanghai Biotechnology Co., Ltd
1-Cyclopentene-1,2-dicarboxylic anhydride pictures 2021-07-02 1-Cyclopentene-1,2-dicarboxylic anhydride
3205-94-5
 $10.00-15.00 1KG 99%+ HPLC Zhuozhou Wenxi import and Export Co., Ltd

1-Cyclopentene-1,2-dicarboxylic anhydride Spectrum

1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE(3205-94-5)1HNMR1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE(3205-94-5)FT-IR1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE(3205-94-5)Raman1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE(3205-94-5)IR

3205-94-5 (1-Cyclopentene-1,2-dicarboxylic anhydride) Related Search:

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Cyclopentene-1,2-dicarboxylic acid anhydride 4,5,6,6a-Tetrahydro-1H-cyclopenta[c]furan-1,3(3aH)-dione 5,6-dihydro-4H-cyclopenta[c]furan-1,3-dione 5,6-dihydro-4H-cyclopenta[c]furan-1,3-quinone NSC 291644 1-Cyclopentene-1,2-dicarboxylic anhydride 96% 1H，3H，4H，5H，6H-Cyclopenta[c]furan-1,3-dione 1-CYCLOPENTENE-1,2-DICARBOXYLIC ANHYDRIDE ISO 9001：2015 REACH 1H-Cyclopenta[c]furan-1,3(4H)-dione, 5,6-dihydro- Cyclopentane-1,2-dicarboxylic anhydride 5,6-Dihydro-1H-cyclopenta[c]furan-1,3(4H)-dione 1-Cyclopentene-1,2-dicarboxylic anhydride 3205-94-5 Carboxylic Acid Anhydrides Carbonyl Compounds Building Blocks Organic Building Blocks Carbonyl Compounds Carboxylic Acid Anhydrides Organic Building Blocks Building Blocks Carbonyl Compounds Carboxylic Acid Anhydrides Chemical Synthesis Organic Building Blocks