Dimethyl-bis-<4-tolyl>-phosphonium, also known as DMTP, is an organophosphorus compound with the chemical formula (CH3)2P(C6H4-4-CH3)2. It is a colorless, crystalline solid that is soluble in organic solvents. DMTP is a versatile reagent in organic synthesis, particularly in the formation of carbon-carbon bonds through the Witting reaction, where it acts as a source of the phosphonium ylide. It is also used as a ligand in transition metal-catalyzed reactions and as a precursor to other phosphorus-containing compounds. The compound is synthesized by the reaction of dimethyl phosphonate with 4-methylphenylmagnesium bromide. Due to its reactivity and potential applications, DMTP is an important intermediate in the field of organophosphorus chemistry.

1499-36-1

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Basic information
1. Product Name: Dimethyl-bis-<4-tolyl>-phosphonium
2. Synonyms:
3. CAS NO:1499-36-1
4. Molecular Formula:
5. Molecular Weight: 370.213
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-bis-<4-tolyl>-phosphonium(CAS DataBase Reference)
10. NIST Chemistry Reference: Dimethyl-bis-<4-tolyl>-phosphonium(1499-36-1)
11. EPA Substance Registry System: Dimethyl-bis-<4-tolyl>-phosphonium(1499-36-1)
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: 1499-36-1(Hazardous Substances Data)

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Check Digit Verification of cas no

The CAS Registry Mumber 1499-36-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,4,9 and 9 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 1499-36:
(6*1)+(5*4)+(4*9)+(3*9)+(2*3)+(1*6)=101
101 % 10 = 1
So 1499-36-1 is a valid CAS Registry Number.

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