Product Identification

Product Name

1-Hydroxy-3,4-dimethylbenzene

Synonyms

3,4-Dimethylphenol
4-Hydroxy-o-xylene

CAS

95-65-8

Formula

C8H10O

Molecular Weight

122.17

EINECS

202-439-5

RTECS

ZE6300000

RTECS Class

Agricultural Chemical and Pesticide; Tumorigen

Merck

12,10215

Beilstein/Gmelin

1099267

Beilstein Reference

4-06-00-03099

EC Index Number

604-006-00-X

EC Class

Toxic; Corrosive; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Colorless to light tan crystalline powder or solid.

Solubility in water

Slightly soluble

Melting Point

62 - 65

Boiling Point

227

Vapor Pressure

0.05 (25 C)

Density

1.023 g/cm3 (17 C)

pKa/pKb

10.38 (pKa)

Partition Coefficient

2.23

Heat Of Vaporization

48.2 kJ/mol

Usage

Starting materials in the phenolic resins. Xylenols.

Odor threshold

0.003 mg/m3

Refractive Index

1.5442 (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. Get medical aid if cough or other symptoms appear.

Skin

Get medical aid. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing 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, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.

Handling

Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation.

Hazards Identification

Inhalation

May cause respiratory tract irritation.

Skin

Causes skin irritation. May cause skin burns.

Eyes

Causes eye irritation. May cause eye burns.

Ingestion

May cause irritation of the digestive tract. May be harmful if swallowed. A case of fatal xylenol ingestion by a long stay mental hospital patient is described. Clinical course was similar to that observed in other phenolic poisonings with active bowel sounds, nausea, vomiting, severe metabolic acidosis, hypotension, and cardiac and renal failure.

Hazards

When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.

EC Risk Phrase

R 24/25 34 51/53

EC Safety Phrase

S 26 36/37/39 45 61

UN (DOT)

2261

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

Chronic ingestion may cause effects similar to those of acute ingestion.

Fire Fighting Measures

Flash Point

80-95

Autoignition

599

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Upper exp. limit

6.4

Lower exp. limit

1.1

Fire Potential

This material is probably combustible.

Accidental Release Measures

Small spills/leaks

Sweep up or absorb material, then place into a suitable clean, dry, closed container for disposal. Avoid generating dusty conditions.

Stability and Reactivity

Disposal Code

9

Incompatibilities

Bases - acid chlorides - acid anhydrides - oxidizing agents - corrodes steel - brass - copper - copper alloys.

Stability

Stable under normal temperatures and pressures.

Decomposition

Carbon monoxide, carbon dioxide.

Combustion Products

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

Transport Information

UN Number

2261

Hazard Class

6.1

Packing Group

II

HS Code

2907 14 00