1920-21-4

• 常用中文名：2H-Pyran-2-carboxaldehyde,3,4-dihydro-2,5-dimethyl-
• 常用英文名：2H-Pyran-2-carboxaldehyde,3,4-dihydro-2,5-dimethyl-
• CAS号：1920-21-4
• 分子式：C₈H₁₂O₂
• 分子量：140.18000
• 发布时间：2016-08-06 15:52:46
• 更新时间：2025-08-25 19:48:55

名称

• 英文名: 2,5-dimethyl-3,4-dihydropyran-2-carbaldehyde
• 英文别名: 2H-Pyran-2-carboxaldehyde,3,4-dihydro-2,5-dimethyl; Methacrylaldehyde dimer; 2,5-dimethyl-3,4-dihydro-2H-pyran-2-carbaldehyde; 3,4-dihydro-2,5-dimethyl-2H-pyran-2-carboxaldehyde; 3,4-Dihydro-2,5-dimethyl-2H-pyran-2-carbaldehyde; Methacrolein dimer; 1,4-Pyran,2,3-dihydro-2,5-dimethyl-2-formyl; 2,3-Dihydro-2,5-dimethyl-2-formyl-1,4-pyran; EINECS 217-647-1

物化性质

• 密度: 1.047g/cm3
• 沸点: 201.4ºC at 760 mmHg
• 分子式: C₈H₁₂O₂
• 分子量: 140.18000
• 闪点: 74.1ºC
• 精确质量: 140.08400
• PSA: 26.30000
• LogP: 1.65820
• 蒸汽压: 0.308mmHg at 25°C
• 折射率: 1.512

毒性和生态

CHEMICAL IDENTIFICATION RTECS NUMBER : UP7875000 CHEMICAL NAME : 1,4-Pyran, 2,3-dihydro-2,5-dimethyl-2-formyl- CAS REGISTRY NUMBER : 1920-21-4 BEILSTEIN REFERENCE NO. : 0114546 LAST UPDATED : 199806 DATA ITEMS CITED : 3 MOLECULAR FORMULA : C8-H12-O2 MOLECULAR WEIGHT : 140.20 WISWESSER LINE NOTATION : T6O BUTJ C1 FVH F1 HEALTH HAZARD DATA ACUTE TOXICITY DATA TYPE OF TEST : Standard Draize test ROUTE OF EXPOSURE : Administration onto the skin SPECIES OBSERVED : Rodent - rabbit REFERENCE : 85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,803,1986 TYPE OF TEST : Standard Draize test ROUTE OF EXPOSURE : Administration into the eye SPECIES OBSERVED : Rodent - rabbit REFERENCE : 85JCAE "Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986 Volume(issue)/page/year: -,803,1986 ** ACUTE TOXICITY DATA ** TYPE OF TEST : LD50 - Lethal dose, 50 percent kill ROUTE OF EXPOSURE : Oral SPECIES OBSERVED : Rodent - rat DOSE/DURATION : 2460 mg/kg TOXIC EFFECTS : Details of toxic effects not reported other than lethal dose value REFERENCE : AMIHBC AMA Archives of Industrial Hygiene and Occupational Medicine. (Chicago, IL) V.2-10, 1950-54. For publisher information, see AEHLAU. Volume(issue)/page/year: 10,61,1954

合成路线

108-31-6 78-85-3 ~9% 1920-21-4

文献：Zhu, Zuolin; Espenson, James H. Journal of the American Chemical Society, 1997 , vol. 119, # 15 p. 3507 - 3512

78-85-3 ~89% 1920-21-4

文献：Karpiak; Marshalok; Fedevich; Avdosieva; Kovalskyi, Ya. P. Chemistry of Heterocyclic Compounds, 2008 , vol. 44, # 11 p. 1334 - 1338

107-25-5 78-85-3 ~% 38328-65-3 1920-21-4

文献：Srivastava; Pavao; Seabra; Brown Journal of Molecular Structure, 1997 , vol. 412, # 1-2 p. 51 - 58

上下游产品

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