Dimethyl acetylenedicarboxylate (DMAD) is a colorless, highly reactive organic compound with the chemical formula C6H6O4. It is a key building block in organic synthesis, particularly in the preparation of various natural products and pharmaceuticals. DMAD is a dicarboxylic acid ester, featuring a triple bond and two ester groups, which makes it a versatile reagent for various chemical reactions. It is commonly used in the synthesis of heterocycles, natural products, and polymers. Due to its high reactivity, it is often handled under controlled conditions to prevent unwanted side reactions. The compound is also known for its use in the preparation of advanced materials and as a precursor in the synthesis of certain pharmaceuticals.

4458-43-9

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Basic information
1. Product Name: dimethyl acetylenedicarboxylate
2. Synonyms: dimethyl acetylenedicarboxylate
3. CAS NO:4458-43-9
4. Molecular Formula:
5. Molecular Weight: 142.111
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: dimethyl acetylenedicarboxylate(CAS DataBase Reference)
10. NIST Chemistry Reference: dimethyl acetylenedicarboxylate(4458-43-9)
11. EPA Substance Registry System: dimethyl acetylenedicarboxylate(4458-43-9)
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: 4458-43-9(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 4458-43-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,5 and 8 respectively; the second part has 2 digits, 4 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 4458-43:
(6*4)+(5*4)+(4*5)+(3*8)+(2*4)+(1*3)=99
99 % 10 = 9
So 4458-43-9 is a valid CAS Registry Number.

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