1568-20-3

• 

• Basic information

  1. Product Name: 5-methyl-2-pyrazoline
  2. Synonyms: 5-methyl-2-pyrazoline;4,5-Dihydro-5-methyl-1H-pyrazole
  3. CAS NO:1568-20-3
  4. Molecular Formula: C₄H₈N₂
  5. Molecular Weight: 84.11972
  6. EINECS: N/A
  7. Product Categories: N/A
  8. Mol File: 1568-20-3.mol
  9. Article Data: 2

• 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: 5-methyl-2-pyrazoline(CAS DataBase Reference)
  10. NIST Chemistry Reference: 5-methyl-2-pyrazoline(1568-20-3)
  11. EPA Substance Registry System: 5-methyl-2-pyrazoline(1568-20-3)

• 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: 1568-20-3(Hazardous Substances Data)

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• Article

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• 1H-Pyrazole, 4,5-dihydro-5-methyl-

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• SAGECHEM LIMITED
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• 5-methyl-2-pyrazoline

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• Shanghai Run-Biotech Co., Ltd.
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1568-20-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1568-20-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,5,6 and 8 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1568-20:
(6*1)+(5*5)+(4*6)+(3*8)+(2*2)+(1*0)=83
83 % 10 = 3
So 1568-20-3 is a valid CAS Registry Number.

1568-20-3Upstream product

• 123-73-9 trans-Crotonaldehyde 
• 2004-76-4 1-formyl-5-methyl-4,5-dihydro-1H-pyrazole 
• 7647-01-0 hydrogenchloride 
• 123-73-9 crotonaldehyde 
• 19039-98-6 (all-E)-di-but-2-enylidene-hydrazine 

1568-20-3Downstream Products

• 1911-30-4 3-methyl-4,5-dihydro-1H-pyrazole 
• 1087076-03-6 5,5-dimethyl-3-(5-methyl-4,5-dihydro-1H-pyrazol-1-yl)cyclohex-2-en-1-one 
• 1453-58-3 3-Methylpyrazole 
• 590-88-5 1-methyltrimethylenediamine 

1568-20-3Relevant articles and documents

Thermally induced opening of the diaziridine ring in 6-aryl-2-methyl-1,5- diazabicyclo[3.1.0]hexanes

Koptelov,Saik

, p. 1501 - 1506 (2006)

Thermally induced opening of the diaziridine ring in 6-aryl-2-methyl-1,5- diazabicyclo[3.1.0]-hexanes at the carbon-nitrogen bond is characterized by low regioselectivity; isomerization of unstable intermediate azomethine imines leads to mixtures of the corresponding 1-arylmethyl-5-methyl-4,5-dihydro-1H-pyrazoles and 1-arylmethyl-3-methyl-4,5-dihydro-1H-pyrazoles at a ratio of ～6:5. Analogous regioselectivity in opening of the three-membered ring is observed in the presence of phenyl isocyanate. In this case, adducts with cis arrangement of the aryl and methyl groups are formed as the major products (cis/trans ratio ～3:1).

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