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Basic Information
CAS No.: 99-72-9
Name: FEMA 3078
Molecular Structure:
Molecular Structure of 99-72-9 (FEMA 3078)
Formula: C10H12 O
Molecular Weight: 148.205
Synonyms: Hydratropaldehyde,p-methyl- (6CI,7CI,8CI); 2-(4-Methylphenyl)propanal; 2-(4-Tolyl)propanal;2-(p-Methylphenyl)propanal; 2-(p-Methylphenyl)propionaldehyde;2-(p-Tolyl)propanal; 2-(p-Tolyl)propionaldehyde; p-Methylhydratropaldehyde; a,4-Dimethylbenzeneacetaldehyde
EINECS: 202-782-0
Density: 0.967 g/cm3
Boiling Point: 226.8 ºCat 760 mmHg
Flash Point: 101 ºC
Safety: Moderately toxic by ingestion. When heated to decomposition it emits acrid smoke and irritating fumes. See also ALDEHYDES.
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Chemistry

Empirical Formula of 2-(p-Tolyl)propionic aldehyde (CAS NO.99-72-9): C10H12O
Molecular Weight: 148.2017 g/mol
EINECS: 202-782-0 
Index of Refraction: 1.505
Density: 0.967 g/cm3
Flash Point: 101 °C
Enthalpy of Vaporization: 46.33 kJ/mol
Boiling Point: 226.8 °C at 760 mmHg
Vapour Pressure: 0.0804 mmHg at 25 °C
Structure of 2-(p-Tolyl)propionic aldehyde (CAS NO.99-72-9):
            
IUPAC Name of 2-(p-Tolyl)propionic aldehyde (CAS NO.99-72-9): 2-(4-Methylphenyl)propanal

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
rabbit LD50 skin > 5gm/kg (5000mg/kg)   Food and Cosmetics Toxicology. Vol. 14, Pg. 607, 1976.
rat LD50 oral 3500mg/kg (3500mg/kg)   Food and Cosmetics Toxicology. Vol. 14, Pg. 607, 1976.

Consensus Reports

Reported in EPA TSCA Inventory.

Safety Profile

Moderately toxic by ingestion. When heated to decomposition it emits acrid smoke and irritating fumes. See also ALDEHYDES.

Specification

 2-(p-Tolyl)propionic aldehyde ,its cas register number is 99-72-9. It also can be called 2-(4-Methylphenyl)propanal ; Benzeneacetaldehyde, alpha,4-dimethyl- ; p-Methylhydratropaldehyde ;and 4-Methylhydratropaldehyde .