8.02971

3,4-Dihydro-2H-pyran

for synthesis

• Synonym(s): 3,4-Dihydro-2H-pyran
• Empirical Formula (Hill Notation): C₅H₈O
• CAS Number: 110-87-2
• Molecular Weight: 84.12
• MDL number: MFCD00006558
• UNSPSC Code: 12352005
• EC Index Number: 203-810-4

Properties

• vapor pressure: 77.8 hPa ( 20 °C)
• Quality Level: 200
• assay: ≥98.0% (GC)
• form: liquid
• autoignition temp.: 240 °C
• potency: >4000 mg/kg LD₅₀, oral (Rat)
• expl. lim.: 1.1-13.8 % (v/v)
• pH: 7 (20 °C, 5 g/L in H₂O)
• bp: 85.5 °C/1013 hPa
• mp: -70 °C
• transition temp: flash point -9 °C
• solubility: 7.7 g/L
• density: 0.929 g/cm³ at 20 °C
• storage temp.: 2-30°C
• InChI: 1S/C5H8O/c1-2-4-6-5-3-1/h2,4H,1,3,5H2
• InChI key: BUDQDWGNQVEFAC-UHFFFAOYSA-N

Description

Application

• 1, 5-Pentanediol production from 3, 4-dihydro-2H-pyran: A novel method for synthesizing bio-based 1,5-pentanediol from 3,4-dihydro-2H-pyran is explored, highlighting its potential industrial application. (Zhao et al., 2024).

Analysis Note

Assay (GC, area%): ≥ 98.0 % (a/a)
Density (d 20 °C/ 4 °C): 0.926 - 0.929
Water (GC): ≤ 0.50 % (a/a)
Identity (IR): passes test

Safety Information

• pictograms: GHS02,GHS07
• signalword: Danger
• hcodes: H225 - H315 - H317 - H319 - H412
• pcodes: P210 - P233 - P273 - P280 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Aquatic Chronic 3 - Eye Irrit. 2 - Flam. Liq. 2 - Skin Irrit. 2 - Skin Sens. 1B
• supp_hazards: EUH019
• Storage Class: 3 - Flammable liquids
• wgk_germany: WGK 3
• flash_point_f: 5.0 °F - closed cup
• flash_point_c: -15 °C - closed cup