CIS-DECAHYDRONAPHTHALENE Property

Melting point:

−43 °C(lit.)

Boiling point:

193 °C(lit.)

Density 

0.897 g/mL at 25 °C(lit.)

vapor density 

4.76 (vs air)

vapor pressure 

42 mm Hg ( 92 °C)

refractive index 

n20/D 1.481(lit.)

Flash point:

137 °F

storage temp. 

Sealed in dry,Room Temperature

form 

clear liquid

color 

Colorless to Almost colorless

explosive limit

0.7-4.9%, 100°F

Water Solubility 

8.92g/L(300 ºC)

Merck 

14,2846

BRN 

1900822

Dielectric constant

2.2（20℃）

Stability:

Stable. Incompatible with oxidizing agents. May form explosive peroxides. Heat and light accelerate peroxide formation.

CAS DataBase Reference

493-01-6(CAS DataBase Reference)

EPA Substance Registry System

cis-Decahydronaphthalene (493-01-6)

Safety

Hazard Codes 

Xn,N,C

Risk Statements 

20-36/37/38-65-51/53-34

Safety Statements 

26-36-62-61-45-36/37/39

RIDADR 

UN 1147 3/PG 3

WGK Germany 

3

RTECS 

QJ3150000

Autoignition Temperature

482 °F

HazardClass 

3.2

PackingGroup 

III

HS Code 

29021990

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H226Flammable liquid and vapour

H304May be fatal if swallowed and enters airways

H314Causes severe skin burns and eye damage

H331Toxic if inhaled

H411Toxic to aquatic life with long lasting effects

Precautionary statements

P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.

P303+P361+P353IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower.

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

CIS-DECAHYDRONAPHTHALENE Chemical Properties,Usage,Production

Chemical Properties

colourless liquid

Uses

cis-Decahydronaphthalene is used as a quantitation standard in the determination of sesquiterpanes.

Definition

ChEBI: Decalin is an ortho-fused bicyclic hydrocarbon that is the decahydro- derivative of naphthalene. It has a role as a solvent.

Purification Methods

Purification methods described for the mixed isomers are applicable here. The individual isomers can be separated by very efficient fractional distillation, followed by fractional crystallisation by partial freezing. The cis-isomer reacts preferentially with AlCl3 and can be removed from the trans-isomer by stirring the mixture with a limited amount of AlCl3 for 48hours at room temperature, filtering and distilling. [Seyer & Walker J Am Chem Soc 60 2125 1938, Baker & Schuetz J Am Chem Soc 69 1250 1949.] A very pure authentic sample is best obtained by synthesis from cis-1,2-bis-chloroethylcyclohexane [Whitesides & Gutowski J Org Chem 41 2882 1976, Beilstein 5 IV 310.]