4H,8H-Benzo[1,2-c:5,4-c]diisoxazole, also known as 4,8-dihydrobenzo[1,2-c:5,4-c]diisoxazole, is a chemical compound with the molecular formula C9H8N2O2. It is a heterocyclic compound consisting of two isoxazole rings fused to a benzene ring. 4H,8H-Benzo[1,2-c:5,4-c]diisoxazole(8CI,9CI) is characterized by its unique structure, which features two nitrogen atoms in the isoxazole rings and an oxygen atom in each ring. It is an important intermediate in the synthesis of various pharmaceuticals and agrochemicals due to its potential reactivity and the ability to form diverse derivatives. The compound is typically synthesized through cyclization reactions involving appropriate precursors, such as o-phenylenediamine and carbonyl compounds. Its properties, such as solubility and stability, can be influenced by the presence of substituents on the benzene ring, making it a versatile building block in organic synthesis.

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Basic information
1. Product Name: 4H,8H-Benzo[1,2-c:5,4-c]diisoxazole(8CI,9CI)
2. Synonyms: 4H,8H-Benzo[1,2-c:5,4-c]diisoxazole(8CI,9CI)
3. CAS NO:267-53-8
4. Molecular Formula: C8H6N2O2
5. Molecular Weight: 162.14544
6. EINECS: N/A
7. Product Categories: OXAZOLE
8. Mol File: 267-53-8.mol
Chemical Properties
1. Melting Point: N/A
2. Boiling Point: N/A
3. Flash Point: N/A
4. Appearance: /
5. Density: N/A
6. Refractive Index: N/A
7. Storage Temp.: N/A
8. Solubility: N/A
9. CAS DataBase Reference: 4H,8H-Benzo[1,2-c:5,4-c]diisoxazole(8CI,9CI)(CAS DataBase Reference)
10. NIST Chemistry Reference: 4H,8H-Benzo[1,2-c:5,4-c]diisoxazole(8CI,9CI)(267-53-8)
11. EPA Substance Registry System: 4H,8H-Benzo[1,2-c:5,4-c]diisoxazole(8CI,9CI)(267-53-8)
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: 267-53-8(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 267-53-8 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 2,6 and 7 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 267-53:
(5*2)+(4*6)+(3*7)+(2*5)+(1*3)=68
68 % 10 = 8
So 267-53-8 is a valid CAS Registry Number.

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