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Merck
CN

8.02971

3,4-Dihydro-2H-pyran

for synthesis

Synonym(s):

3,4-Dihydro-2H-pyran

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About This Item

Empirical Formula (Hill Notation):
C5H8O
CAS Number:
Molecular Weight:
84.12
UNSPSC Code:
12352005
EC Index Number:
203-810-4
NACRES:
NA.22
MDL number:
Assay:
≥98.0% (GC)
Form:
liquid
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vapor pressure

77.8 hPa ( 20 °C)

Quality Level

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

SMILES string

O1CCCC=C1

InChI

1S/C5H8O/c1-2-4-6-5-3-1/h2,4H,1,3,5H2

InChI key

BUDQDWGNQVEFAC-UHFFFAOYSA-N

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


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pictograms

FlameExclamation mark

signalword

Danger

Hazard Classifications

Aquatic Chronic 3 - Eye Irrit. 2 - Flam. Liq. 2 - Skin Irrit. 2 - Skin Sens. 1B

supp_hazards

Storage Class

3 - Flammable liquids

wgk

WGK 3

flash_point_f

5.0 °F - closed cup

flash_point_c

-15 °C - closed cup



Certificates of Analysis (COA)

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Global Trade Item Number

SKUGTIN
802971025004022536377544
802971010004022536377537