2,3-dihydro-furan-2,5-dicarboxylic acid, also known as maleic acid anhydride or succinic anhydride, is a cyclic organic compound with the chemical formula C4H2O3. It is a colorless, crystalline solid that is soluble in water and various organic solvents. 2,3-dihydro-furan-2,5-dicarboxylic acid is an important intermediate in the chemical industry, used in the production of various chemicals, including unsaturated polyester resins, alkyd resins, and various pharmaceuticals. It is also used as a chelating agent and a reagent in organic synthesis. The compound is produced industrially through the oxidation of butane or butene, and it plays a significant role in the synthesis of various chemicals and materials due to its versatile chemical properties.

2043-99-4

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Basic information
1. Product Name: 2,3-dihydro-furan-2,5-dicarboxylic acid
2. Synonyms: 2,3-dihydro-furan-2,5-dicarboxylic acid
3. CAS NO:2043-99-4
4. Molecular Formula:
5. Molecular Weight: 158.111
6. EINECS: N/A
7. Product Categories: N/A
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: N/A
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: 2,3-dihydro-furan-2,5-dicarboxylic acid(CAS DataBase Reference)
10. NIST Chemistry Reference: 2,3-dihydro-furan-2,5-dicarboxylic acid(2043-99-4)
11. EPA Substance Registry System: 2,3-dihydro-furan-2,5-dicarboxylic acid(2043-99-4)
Safety Data
1. Hazard Codes: N/A
2. Statements: N/A
3. Safety Statements: N/A
4. WGK Germany:
5. RTECS:
6. HazardClass: N/A
7. PackingGroup: N/A
8. Hazardous Substances Data: 2043-99-4(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 2043-99-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,0,4 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 2043-99:
(6*2)+(5*0)+(4*4)+(3*3)+(2*9)+(1*9)=64
64 % 10 = 4
So 2043-99-4 is a valid CAS Registry Number.

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