Product Identification

Product Name

4-(4-Hydroxy-3,5-dimethyl-phenyl)-2,6-dimethyl-phenol

Synonyms

2,2',6,6'-Tetramethylbiphenol
3,3',5,5'-Tetramethyl-1,1'-biphenyl-4,4'-diol
4-(4-Hydroxy-3,5-dimethylphenyl)-2,6-dimethylphenol
4,4 -Dihydroxy-3,3 ,5,5 -tetramethylbiphenyl

CAS

2417-04-1

Formula

C16H18O2

Molecular Weight

242.31

Physical and Chemical Properties

Appearance

Light yellow powder.

Solubility in water

24 mg/L (25 C)

Melting Point

221.8

Boiling Point

355

Vapor Pressure

1.6E-5 (25 C)

Density

1.12 g/cm3 (20 C)

pKa/pKb

10.22 (pK)

Partition Coefficient

4.27

Heat Of Vaporization

62.33 kJ/mol

Usage

Antioxidant.

First Aid Measures

Ingestion

If swallowed, wash out mouth with water provided person is conscious. Call a physician.

Inhalation

If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.

Skin

In case of contact, immediately wash skin with soap and copious amounts of water. Remove contaminated clothing and shoes. Call a physician.

Eyes

In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Handling and Storage

Storage

Keep container closed. Store in a cool dry place.

Hazards Identification

Inhalation

Material is irritating to mucous membranes and upper respiratory tract.

Hazards

Emits toxic fumes under fire conditions.

EC Risk Phrase

36/37/38

EC Safety Phrase

26 36

Exposure Controls/Personal Protection

Personal Protection

Compatible chemical-resistant gloves. Chemical safety goggles. Protective clothing.

Respirators

Wear appropriate government approved respirator.

Exposure Effects

Harmful if swallowed, inhaled, or absorbed through skin. Causes eye and skin irritation. Limited evidence of a carcinogenic effect. Target organs: Liver, Kidneys. Possible mutagen. Irritating to eyes, respiratory system and skin.

Fire Fighting Measures

Flash Point

162

Fire Fighting

Extinguish with water spray, carbon dioxide, dry chemical powder or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.

Accidental Release Measures

Small spills/leaks

Sweep up, place in a bag and hold for waste disposal. Avoid raising dust. Ventilate area and wash spill site after material pickup is complete.

Stability and Reactivity

Stability

Stable at normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents.

Decomposition

Oxides of carbon.