Product Identification

Product Name

4-(1,1-Dimethylethyl)-1,2-benzenediol

Synonyms

1,2-Benzenediol, 4-(1,1-dimethylethyl)-
4-tert-Butyl-1,2-benzenediol
4-tert-Butyl-1,2-dihydroxybenzene
4-tert-Butylcatechol
5-tert-Butylcatechol

CAS

98-29-3

Formula

C10H14O2

Molecular Weight

166.22

EINECS

202-653-9

RTECS

UX1400000

RTECS Class

Tumorigen; Mutagen; Primary Irritant

Beilstein/Gmelin

2043335

Beilstein Reference

4-06-00-06014

EC Class

harmful, corrosive, dangerous for the environment

Physical and Chemical Properties

Appearance

White crystals.

Solubility in water

2 g/L

Melting Point

53

Boiling Point

285

Vapor Pressure

0.0016 (25 C)

Density

1.0317 g/cm3 (75 C)

pKa/pKb

9.66 (pKa)

Partition Coefficient

2.94

Heat Of Vaporization

54.6 kJ/mol

Heat Of Combustion

-5471 kJ/mol

Saturation Concentration

3.68 ppm (0.00013%) at 25 C (calculated)

First Aid Measures

Ingestion

Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Get medical aid.

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. 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.

Handling and Storage

Storage

Store in a cool, dry place. Do not store in direct sunlight. Store in a tightly closed container. Do not expose to air.

Handling

Wash thoroughly after handling. Wash hands before eating. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid breathing dust, vapor, mist, or gas. Take precautionary measures against static discharges. Do not get on skin or in eyes. Avoid ingestion and inhalation.

Hazards Identification

Ingestion

May cause gastrointestinal irritation with nausea, vomiting and diarrhea.

Inhalation

May cause respiratory tract irritation. Inhalation of vapor may cause respiratory tract irritation.

Skin

Causes severe skin irritation. Harmful if absorbed through the skin.

Eyes

Causes severe eye irritation.

Hazards

Contact with metals may evolve flammable hydrogen gas.

EC Risk Phrase

R 21 36/37/38 43

EC Safety Phrase

S 26 28 36/37

UN (DOT)

2811

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.

Poison Class

2

Fire Fighting Measures

Flash Point

129

Autoignition

160

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Dusts at sufficient concentrations can form explosive mixtures with air. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Containers may explode when heated. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam. Cool containers with flooding quantities of water until well after fire is out.

Upper exp. limit

5.8

Lower exp. limit

.9

Fire Potential

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container. Clean up spills immediately, using the appropriate protective equipment. Scoop up with a nonsparking tool, then place into a suitable container for disposal. Avoid generating dusty conditions. Remove all sources of ignition.

Stability and Reactivity

Disposal Code

3

Stability

Stable under normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents, iron, and carbon steel

Decomposition

Carbon monoxide, carbon dioxide.

Combustion Products

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

Transport Information

UN Number

2811

Hazard Class

6.1

Packing Group

I; II; III

HS Code

2907 29 00