Dipentene

Product Name:

Dipentene

CAS:

138-86-3

MF:

C10H16

MW:

136.23

EINECS:

205-341-0

Mol File:

138-86-3.mol

Melting point 

-84--104 °C

Boiling point 

176-177 °C(lit.)

density 

0.844 g/mL at 25 °C(lit.)

vapor density 

4.7 (vs air)

vapor pressure 

<3 mm Hg ( 14.4 °C)

refractive index 

n20/D 1.473(lit.)

Fp 

119 °F

storage temp. 

2-8°C

form 

Liquid

color 

Clear colorless to pale yellow

Odor

Pleasant, pine-like; lemon-like.

Odor Threshold

0.038ppm

explosive limit

0.7-6.1%, 150°F

Water Solubility 

<1 g/100mL

Merck 

14,5493

BRN 

3587825

Stability:

Stable. Flammable. Incompatible with strong oxidizing agents.

InChIKey

AJSJXSBFZDIRIS-UHFFFAOYSA-N

CAS DataBase Reference

138-86-3(CAS DataBase Reference)

NIST Chemistry Reference

Limonene(138-86-3)

EPA Substance Registry System

Limonene (138-86-3)

Hazard Codes 

Xi,N

Risk Statements 

10-38-43-50/53

Safety Statements 

24-37-60-61

RIDADR 

UN 2052 3/PG 3

WGK Germany 

2

RTECS 

OS8350000

F 

8-10-23

Autoignition Temperature

458 °F

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

HS Code 

29021990

Hazardous Substances Data

138-86-3(Hazardous Substances Data)

Toxicity

LD50 orally in Rabbit: 5300 mg/kg

Chemical Properties

colourless or light yellow liquid

Chemical Properties

Dipentene has a pleasant, lemon-like odor free from camphoraceous and turpentine-like notes. Limonene is the most important and widespread terpene; it is known in the d- and l- optically active forms and in the optically inactive dl-form (known as dipentene).

Uses

Dipentene is used for perfuming and to mask odor. It is a chemical constituent of citrus oil.

Preparation

Dipentene may be obtained by steam distillation of citrus peels and pulp resulting from the production of juice and cold pressed oils, or from deterpenation of citrus oils; it is sometimes redistilled.

Aroma threshold values

Detection: 4 to 229 ppb

Taste threshold values

Taste characteristics at 30 ppm: sweet, orange, citrus and terpy.

General Description

A colorless liquid with an odor of lemon. Flash point 113°F. Density about 7.2 lb /gal and insoluble in water. Hence floats on water. Vapors heavier than air. Used as a solvent for rosin, waxes, rubber; as a dispersing agent for oils, resins, paints, lacquers, varnishes, and in floor waxes and furniture polishes.

Air & Water Reactions

Flammable. Insoluble in water.

Reactivity Profile

Cinene may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas.

Health Hazard

Liquid irritates eyes; prolonged contact with skin causes irritation. Ingestion causes irritation of gastrointestinal tract.

Fire Hazard

Behavior in Fire: Containers may explode.

Chemical Reactivity

Reactivity with Water No reaction; Reactivity with Common Materials: No reaction; Stability During Transport: Stable; Neutralizing Agents for Acids and Caustics: Not pertinent; Polymerization: Not pertinent; Inhibitor of Polymerization: Not pertinent.

Contact allergens

Dipentene corresponds to a racemic mixture of d-limonene and l-limonene. Dipentene can be prepared from wood turpentine or by synthesis. It is used as a solvent for waxes, rosin and gums, in printing inks, perfumes, rubber compounds, paints, enamels, and lacquers. An irritant and sensitizer, dipentene caused contact dermatitis mainly in painters, polishers, and varnishers

Contact allergens

Limonene is a racemic form of dand l-limonene. d-Limonene is contained in Citrus species such as citrus, orange, mandarin, and bergamot. l-Limonene is contained in Pinus pinea. The racemic form (dand l-limonene) is also named dipentene.

Raw materials

Turpentine oil-->Camphor-->ALPHA-PINENE-->FEMA 2771-->Cornmint oil-->TERPENE-->White camphor oil-->Citrus Oil

Preparation Products

Iron oxide red phenolic antirust paint-->1,4-Dicyanobenzene-->Hydrogen peroxide p-menthane-->P-MENTHANE-->Terpene resin。Synthetic