Product Identification

Product Name

1-Methylnaphthalene

Synonyms

alpha-Methylnaftalen
alpha-Methylnaphthalene

CAS

90-12-0

Formula

C11H10

Molecular Weight

142.19999999999999

EINECS

201-966-8

RTECS

QJ9630000

RTECS Class

Mutagen

Beilstein/Gmelin

506793

Beilstein Reference

4-05-00-01687

EC Class

harmful, dangerous for the environment

Physical and Chemical Properties

Appearance

Colorless liquid.

Solubility in water

30 mg/L

Melting Point

-33 to -32

Boiling Point

240

Vapor Pressure

0.05 (25 C)

Density

1.022 g/cm3 (20 C)

pKa/pKb

37(at 25℃) (pKa)

Partition Coefficient

3.87

Heat Of Vaporization

46.0 kJ/mol

Heat Of Combustion

-5784 kJ/mol

Usage

Organic synthesis.

Saturation Concentration

71 ppm at 25 C (calculated)

Vapor Density

4.91

Odor threshold

0.02 ppm.

Refractive Index

1.6170 (20 C)

First Aid Measures

Ingestion

If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.

Inhalation

Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.

Skin

Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Remove contaminated clothing and shoes.

Eyes

Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Handling and Storage

Storage

Keep away from heat and flame. Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with eyes, skin, and clothing. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.

Hazards Identification

Inhalation

Causes respiratory tract irritation.

Skin

Causes skin irritation.

Eyes

Causes eye irritation.

Ingestion

May be harmful if swallowed. Causes digestive tract irritation.

Hazards

Containers may explode when heated.

EC Risk Phrase

R 22 36/37/38 51/53

EC Safety Phrase

S 26 36/37/39 60 61

UN (DOT)

3082

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

Respirators

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Exposure Effects

Hemolytic anemia has developed in neonates following in utero exposure. In utero exposure causes cataracts in rats.

Poison Class

3

Fire Fighting Measures

Flash Point

82

Autoignition

529

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Combustible Liquid. Containers may explode when heated. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use water spray to cool fire-exposed containers.

Upper exp. limit

5.3

Lower exp. limit

.8

Fire Potential

This chemical is combustible.

Accidental Release Measures

Small spills/leaks

Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Wash area with soap and water. Clean up spills immediately, using the appropriate protective equipment. Provide ventilation.

Stability and Reactivity

Disposal Code

1

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents.

Decomposition

Carbon monoxide, carbon dioxide.

Combustion Products

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

Transport Information

UN Number

3082

Hazard Class

9

Packing Group

III

HS Code

2902 90 80