Product Identification

Product Name

2,6-Di-tert-butyl-p-cresol

Synonyms

2,6-Di-tert-butyl-4-methylphenol
2,6-di-tert-Butyl-p-cresol
BHT

CAS

128-37-0

Formula

C15H24O

Molecular Weight

220.36

EINECS

204-881-4

RTECS

GO7875000

RTECS Class

Tumorigen; Mutagen; Reproductive Effector; Human Data; Primary Irritant

Merck

13,1547

Beilstein/Gmelin

1911640

Beilstein Reference

4-06-00-03511

EC Class

dangerous for the environment

Physical and Chemical Properties

Appearance

White to pale yellow crystalline solid, slight phenolic odor.

Solubility in water

0.6 mg/L

Melting Point

69 - 70

Boiling Point

265

Vapor Pressure

0.006 (25 C)

Density

1.069 g/cm3 (19.85 C)

pKa/pKb

12.75 (pKa)

Partition Coefficient

5.32

Heat Of Vaporization

52.2 kJ/mol

Usage

Antioxidant.

Vapor Density

7.6

Saturation Concentration

13 ppm (0.001%) at 20 C (calculated)

Refractive Index

1.4859 (75 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.

Inhalation

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

Skin

Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. 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

Store in a cool, dry place. Do not store in direct sunlight. Keep container closed when not in use.

Handling

Wash thoroughly after handling. Wash hands before eating. Remove contaminated clothing and wash before reuse. Use with adequate ventilation. Avoid contact with skin and eyes. Avoid ingestion and inhalation.

Hazards Identification

Inhalation

Causes respiratory tract irritation.

Skin

Causes skin irritation.

Eyes

Causes eye irritation.

Ingestion

Causes gastrointestinal irritation with nausea, vomiting and diarrhea. May be harmful if swallowed.

EC Risk Phrase

R 22 36/38

EC Safety Phrase

S 26 36/37/39

UN (DOT)

3077

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

May cause reproductive and fetal effects.

Exposure limit(s)

TLV: ppm; 10 mg/m3 (ACGIH 1992-1993). NIOSH REL: TWA 10 mg/m3

Poison Class

4

Fire Fighting Measures

Flash Point

118

Autoignition

345

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. Extinguishing media: Water spray may cause frothing. Use dry chemical or carbon dioxide.

Upper exp. limit

4.9

Lower exp. limit

.5

Fire Potential

This chemical is combustible.

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container. Reduce airborne dust and prevent scattering by moistening with water. Clean up spills immediately, using the appropriate protective equipment. Avoid generating dusty conditions. Provide ventilation.

Stability and Reactivity

Disposal Code

3

Incompatibilities

Acid chlorides, acid anhydrides, oxidizing agents, bases, steel (corrodes it), brass, copper, copper alloys, and direct sunlight.

Stability

Stable under normal temperatures and pressures.

Decomposition

Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Transport Information

UN Number

3077

HS Code

2907 19 00