-
Name
3,4-dihydro-2,5-dimethyl-2H-pyran-2-carbaldehyde
- EINECS
- CAS No. 1920-21-4
- Article Data13
- CAS DataBase
- Density 1.047g/cm3
- Solubility
- Melting Point -64.15°C
- Formula C8H12 O2
- Boiling Point 201.4°C at 760 mmHg
- Molecular Weight 140.182
- Flash Point 74.1°C
- Transport Information
- Appearance
- Safety Moderately toxic by ingestion. A skin and eye irritant. When heated to decomposition it emits acrid smoke and irritating fumes.
- Risk Codes
-
Molecular Structure
- Hazard Symbols
- Synonyms 2,3-Dihydro-2,5-dimethyl-2-formyl-1,4-pyran;2,5-Dimethyl-3,4-dihydro-2H-pyran-2-carboxaldehyde; Methacrolein dimer;Methacrylaldehyde dimer; NSC 44984
- PSA 26.30000
- LogP 1.65820
2,3-Dihydro-2,5-dimethyl-2-formyl-1,4-pyran Chemical Properties
IUPAC Name: 2,5-Dimethyl-3,4-dihydropyran-2-carbaldehyde
Molecular Formula: C8H12O2
Molecular Weight: 140.17968 g/mol
Density: 1.047 g/cm3
Boiling Point: 201.4 °C at 760 mmHg
Flash Point: 74.1 °C
Freely Rotating Bonds: 1
Polar Surface Area: 26.3 Å2
Index of Refraction: 1.512
Molar Refractivity: 40.19 cm3
Molar Volume: 133.7 cm3
Polarizability: 15.93 ×10-24 cm3
Surface Tension: 37.1 dyne/cm
Enthalpy of Vaporization: 43.76 kJ/mol
Vapour Pressure: 0.308 mmHg at 25°C
The Cas Register Number of 2,3-Dihydro-2,5-dimethyl-2-formyl-1,4-pyran is 1920-21-4.The chemical synonyms of 2,3-Dihydro-2,5-dimethyl-2-formyl-1,4-pyran (CAS NO.1920-21-4) are 1,4-Pyran, 2,3-dihydro-2,5-dimethyl-2-formyl- ; 2,3-Dihydro-2, 5-dimethyl-2-formyl-1,4-pyran ; 2,3-Dihydro-2,5-dimethyl-2-formyl-1,4-pyran ; 2H-Pyran-2-carboxaldehyde, 3, 4-dihydro-2,5-dimethyl- ; 2H-Pyran-2-carboxaldehyde, 3,4-dihydro-2,5-dimethyl- ; 2H-Pyran-2-carboxaldehyde, 3,4-dihydro-2,5-dimethyl- (8CI) ; 3,4-Dihydro-2,5-dimethyl-2H-pyran-2-carbaldehyde ; 3,4-Dihydro-2,5-dimethyl-2h-pyran-2-carboxalde .The molecular structure of 2,3-Dihydro-2,5-dimethyl-2-formyl-1,4-pyran (CAS NO.1920-21-4) is 
.
2,3-Dihydro-2,5-dimethyl-2-formyl-1,4-pyran Uses
2,3-Dihydro-2,5-dimethyl-2-formyl-1,4-pyran (CAS NO.1920-21-4) is used in organic synthesise.
2,3-Dihydro-2,5-dimethyl-2-formyl-1,4-pyran Toxicity Data With Reference
| 1. | skn-rbt 10 mg/24H open MLD | AMIHBC AMA Archives of Industrial Hygiene and Occupational Medicine. 10 (1954),61. | ||
| 2. | eye-rbt 20 mg open | AMIHBC AMA Archives of Industrial Hygiene and Occupational Medicine. 10 (1954),61. | ||
| 3. | orl-rat LD50:2460 mg/kg | AMIHBC AMA Archives of Industrial Hygiene and Occupational Medicine. 10 (1954),61. |
2,3-Dihydro-2,5-dimethyl-2-formyl-1,4-pyran Safety Profile
Moderately toxic by ingestion. A skin and eye irritant. When heated to decomposition it emits acrid smoke and irritating fumes.
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