Product Identification

Product Name

p-Menth-1,4(8)-diene

Synonyms

1-Methyl-4-(1-methylethylidene)cyclohexene
1-Methyl-4-propan-2-ylidenecyclohexene
Isoterpinene
p-Mentha-1,4(8)-diene

CAS

586-62-9

Formula

C10H16

Molecular Weight

136.26

EINECS

209-578-0

RTECS

WZ6870000

RTECS Class

Other

Beilstein/Gmelin

1851203

Beilstein Reference

4-05-00-00437

Physical and Chemical Properties

Appearance

Water-white to pale amber liq. Sweet, pine odor.

Solubility in water

Insoluble

Boiling Point

185

Vapor Pressure

1 (40 C)

Density

0.86 g/cm3 (20 C)

Partition Coefficient

4.23

Usage

Solvent for resins, essential oils, manufacture of synthetic resins, chemical derivatives.

Vapor Density

4.7

Refractive Index

1.4883 (20 C)

First Aid Measures

Ingestion

Activated charcoal may cause vomiting and aspiration. It should be reserved for patients with large ingestions or significant coingestants. Protect patients airway with a cuffed endotracheal tube. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents. Seizures: administer a benzodiazepine iv; diazepam (adult: 5 to 10 mg, repeat every 10 to 15 min as needed. Child: 0.2 To 0.5 Mg/kg, repeat every 5 min as needed) or lorazepam (adult: 4 to 8 mg; child: 0.05 To 0.1 Mg/kg). Consider phenobarbital if seizures recur after diazepam 30 mg (adults) or 10 mg (children > 5 years). Monitor for hypotension, dysrhythmias, respiratory depression, and need for endotracheal intubation. Evaluate for hypoglycemia, electrolyte disturbances, hypoxia.

Inhalation

Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.

Skin

Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.

Eyes

Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Handling and Storage

Storage

Store in a cool, dry, well ventilated place away from all sources of ignition.

Handling

All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Inhalation

Inhalation of vapors may produce respiratory irritation. Aspiration pneumonitis, pneumatocele or pulmonary edema has developed after ingestion, iv injection, or the use of turpentine as a vaginal douche.

Skin

May cause irritation or burns.

Eyes

See Skin.

Hazards

Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. May polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water. Substance may be transported hot.

UN (DOT)

2541

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Exposure Effects

Headache and dizziness may occur with vapor exposure. Seizures may develop after large ingestions. CNS depression including coma may occur following turpentine ingestion. The use of turpentine and water as a vaginal douche has resulted in abortion.

Poison Class

4

Fire Fighting Measures

Flash Point

38

Fire Fighting

Do not extinguish fire unless flow can be stopped. Use water in flooding quantities as fog. Solid streams of water may be ineffective. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible. Use foam, dry chemical, or carbon dioxide. Keep run-off water out of sewers and water sources.

Upper exp. limit

6.8

Lower exp. limit

.8

Fire Potential

HIGHLY FLAMMABLE.

Accidental Release Measures

Small spills/leaks

Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard. Use water spray to knock-down vapors.

Stability and Reactivity

Incompatibilities

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

Stability

No data.

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

2541

Hazard Class

3

Packing Group

III