1,9-DIPHENYL-1,3,6,8-NONATETRAEN-5-ONE Property

Melting point:

144-145 °C (lit.)

Boiling point:

388.73°C (rough estimate)

Density 

1.0402 (rough estimate)

refractive index 

1.4880 (estimate)

form 

powder to crystal

color 

Light yellow to Yellow to Orange

CAS DataBase Reference

622-21-9(CAS DataBase Reference)

EPA Substance Registry System

1,3,6,8-Nonatetraen-5-one, 1,9-diphenyl- (622-21-9)

Safety

Risk Statements 

36/37/38

Safety Statements 

24/25

WGK Germany 

3

TSCA 

Yes

HS Code 

29141990

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P405Store locked up.

1,9-DIPHENYL-1,3,6,8-NONATETRAEN-5-ONE Chemical Properties,Usage,Production

Chemical Properties

yellow powder

Uses

Dicinnamalacetone was used as an indicator in measuring the surface acidity of homoionic montmorillonites by titrating certain Hammett indicators adsorbed on the clay with n-butylamine. It was also used as an indicator (yellow to bright red) for detection of excess hydrogen halides in many organic solvents (except alcohols).

Purification Methods

Crystallise the ketone from *benzene/isooctane (1:1). The 1,3,5-trinitrobenzene complex (1:1) has m 113o (from EtOH), and the 1,3,5-trinitrobenzene complex (1:2) has m 110o (from EtOH). [Beilstein 7 H 524, 7 I 293, 7 II 484, 7 III 2756, 7 IV 1834.] The 2,4-dinitrophenylhydrazone has m 199-200o.