Product Identification

Product Name

2,5-Xylenol

Synonyms

2,5-Dimethylphenol
6-Methyl-m-cresol
Hydroxy-p-xylene
p-Xylenol

CAS

95-87-4

Formula

C8H10O

Molecular Weight

122.17

EINECS

202-461-5

RTECS

ZE5775000

RTECS Class

Tumorigen

Merck

12,10215

Beilstein/Gmelin

1099260

Beilstein Reference

4-06-00-03164

EC Index Number

604-006-00-X

EC Class

Toxic; Corrosive; Dangerous for the Environment

Physical and Chemical Properties

Appearance

Colorless to off-white crystalline solid.

Solubility in water

46 g/L

Melting Point

75

Boiling Point

212

Vapor Pressure

0.13 (25 C)

Density

1.169 g/cm3 (15 C)

pKa/pKb

10.42 (pKa)

Partition Coefficient

2.33

Heat Of Vaporization

46.6 kJ/mol

Usage

Used in phosphate esters, alkylated xylenols, antioxidants.

Odor threshold

2.0 - 2.3 mg/m3

Refractive Index

1.5705 (20 C)

First Aid Measures

Ingestion

Do NOT induce vomiting. 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. DO NOT use mouth-to-mouth respiration.

Skin

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

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 only in a well ventilated area. Minimize dust generation and accumulation. Do not get in eyes, on skin, or on clothing. Keep container tightly closed. Avoid contact with heat, sparks and flame. Do not ingest or inhale.

Hazards Identification

Inhalation

May cause respiratory tract irritation.

Skin

Causes skin irritation.

Eyes

Causes eye irritation. May cause conjunctivitis and corneal inflammation.

Ingestion

Harmful if swallowed. May cause irritation of the digestive tract. May cause kidney damage. Human fatalities have been reported from acute poisoning. 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, and 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

87

Autoignition

599

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. Dust can be an explosion hazard when exposed to heat or flame. 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

Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Avoid generating dusty conditions. Provide ventilation.

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