Catalog Number
ACMA00017414
Product Name
Triacetaldehyde
Description
Paraldehyde appears as a clear colorless liquid with a pleasant odor. Flash point 96°F. Melting point 54°F. Less dense than water. Vapors are heavier than air.;Liquid;Liquid;COLOURLESS LIQUID WITH CHARACTERISTIC ODOUR.
IUPAC Name
2,4,6-trimethyl-1,3,5-trioxane
Molecular Weight
132.16g/mol
Molecular Formula
C6H12O3;C6H12O3
Canonical SMILES
CC1OC(OC(O1)C)C
InChI
InChI=1S/C6H12O3/c1-4-7-5(2)9-6(3)8-4/h4-6H,1-3H3
InChI Key
SQYNKIJPMDEDEG-UHFFFAOYSA-N
Boiling Point
262 °F at 760 mm Hg (NTP, 1992);124.3 °C;124.5 °C;124.5 °C
Melting Point
54.7 °F (NTP, 1992);12.6 °C;12.6 °C;12.6 °C;12.6°C;12.6 °C
Flash Point
96 °F (NTP, 1992);96 °F (OPEN CUP);24 °C c.c.
Density
0.9943 at 68 °F (USCG, 1999);0.9923 @ 20 °C/4 °C;0.99 g/cm³
Solubility
Sparingly soluble (NTP, 1992);125g/L;0.85 M;112 mg/mL at 30 °C;SOL IN 8 PARTS WATER AT 25 °C; 17 PARTS BOILING WATER;Sol in water: 1 in 9 parts at 20 °C, 1 in 10 parts at 30 °C, & 1 in 11.5 parts at 37 °C;Sol in sodium chloride solution: 1 in 9.5 parts at 20 °C, 1 in 11 parts at 30 °C, & 1 in 12.5 parts at 37 °C;MISCIBLE WITH ALC, CHLOROFORM, ETHER, OILS;water solubility = 12g/100 g water at 13 degC;112 mg/mL at 30 °C;Solubility in water, g/100ml at 13 °C: 12
Color/Form
COLORLESS, TRANSPARENT LIQUID
Corrosivity
... Has solvent /like/ action upon rubber, polystyrene, & styrene-acrylonitrile copolymer
Covalently-Bonded Unit Count
1
Exact Mass
132.078644g/mol
Heat of Vaporization
75 cal/g (latent heat of vaporization)
Log P
0.67 (LogP);0.67;Log Kow = 0.67;0.67;0.67
MeSH Entry Terms
Paraldehyde
Monoisotopic Mass
132.078644g/mol
Odor
CHARACTERISTIC AROMATIC ODOR;Agreeable odor
Other Experimental
GIVES ACETALDEHYDE ON HEATING WITH DIL HCL OR ON WARMING WITH SEVERAL DROPS CONCENTRATED H₂SO₄;CONGEALS NOT BELOW 11 °C & DISTILS BETWEEN 120 DEG & 126 °C;SPECIFIC HEAT 0.434; BULK DENSITY 8.27 LB/GAL (20 °C);vapor pressure = 11.03 mm Hg at 25 degC;Heat capacity = 1.947 J/g-degK at25 degC;Heat of formation from acetaldehyde = -113.0 kJ/mole
Refractive Index
INDEX OF REFRACTION: 1.4049 AT 20 °C/D
Stability
ON EXPOSURE TO LIGHT & AIR, IT DECOMP TO ACETALDEHYDE & IS OXIDIZED TO ACETIC ACID;DECOMPOSES ON STANDING, STABLE TOWARD ALKALIES.;Preparations of paraldehyde that have a brownish color or a sharp penetrating odor of acetic acid should not be used.
UN Number
1264;1264;1264;1264
Vapor Density
4.5;Relative vapor density (air = 1): 4.5
Vapor Pressure
11.03 mmHg;25.3 mm Hg at 20 °C;Vapor pressure, kPa at 20 °C: 1
Viscosity
1.128 centipoise at 70 °F
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