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4-Methyl-2-(2-methyl-1-propenyl)tetrahydropyran (cis- and trans- mixture) Structure

4-Methyl-2-(2-methyl-1-propenyl)tetrahydropyran (cis- and trans- mixture)

Chemical Properties

Boiling point 86 °C20 mm Hg(lit.)
Density  0.873 g/mL at 20 °C(lit.)
vapor pressure  53Pa at 20℃
FEMA  3236 | TETRAHYDRO-4-METHYL-2-(2-METHYLPROPEN-1-YL)PYRAN
refractive index  n20/D 1.454
Flash point 157 °F
storage temp.  under inert gas (nitrogen or Argon) at 2-8°C
color  A colourless mobile liquid.
Odor at 1.00 % in dipropylene glycol. green red rose spicy fresh geranium
Odor Type floral
optical activity [α]20/D 28±1°, neat
Water Solubility  920mg/L at 20℃
JECFA Number 1237
BRN  1680588
LogP 3.3 at 23℃
CAS DataBase Reference 16409-43-1(CAS DataBase Reference)
EPA Substance Registry System 2H-Pyran, tetrahydro-4-methyl-2-(2-methyl-1-propenyl)- (16409-43-1)

Safety Information

Hazard Codes  Xi
Risk Statements  38-36/37/38
Safety Statements  36-26
WGK Germany  3
RTECS  UQ1470000
10-23
HS Code  29329990
Toxicity The acute oral LD50 value in rats was reported as 4.3 g/kg (3.7-4.9 g/kg) and the acute dermal LD50 value in rabbits as > 5 g/kg (Moreno, 1973).

Usage And Synthesis

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